diff options
Diffstat (limited to 'nx-X11/lib/dpstk/DPSScrollW.c')
| -rw-r--r-- | nx-X11/lib/dpstk/DPSScrollW.c | 3500 |
1 files changed, 3500 insertions, 0 deletions
diff --git a/nx-X11/lib/dpstk/DPSScrollW.c b/nx-X11/lib/dpstk/DPSScrollW.c new file mode 100644 index 000000000..9c2f7e005 --- /dev/null +++ b/nx-X11/lib/dpstk/DPSScrollW.c @@ -0,0 +1,3500 @@ + /* + * DPSScrollW.c + * + * (c) Copyright 1993-1994 Adobe Systems Incorporated. + * All rights reserved. + * + * Permission to use, copy, modify, distribute, and sublicense this software + * and its documentation for any purpose and without fee is hereby granted, + * provided that the above copyright notices appear in all copies and that + * both those copyright notices and this permission notice appear in + * supporting documentation and that the name of Adobe Systems Incorporated + * not be used in advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. No trademark license + * to use the Adobe trademarks is hereby granted. If the Adobe trademark + * "Display PostScript"(tm) is used to describe this software, its + * functionality or for any other purpose, such use shall be limited to a + * statement that this software works in conjunction with the Display + * PostScript system. Proper trademark attribution to reflect Adobe's + * ownership of the trademark shall be given whenever any such reference to + * the Display PostScript system is made. + * + * ADOBE MAKES NO REPRESENTATIONS ABOUT THE SUITABILITY OF THE SOFTWARE FOR + * ANY PURPOSE. IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED WARRANTY. + * ADOBE DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL + * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NON- INFRINGEMENT OF THIRD PARTY RIGHTS. IN NO EVENT SHALL ADOBE BE LIABLE + * TO YOU OR ANY OTHER PARTY FOR ANY SPECIAL, INDIRECT, OR CONSEQUENTIAL + * DAMAGES OR ANY DAMAGES WHATSOEVER WHETHER IN AN ACTION OF CONTRACT, + * NEGLIGENCE, STRICT LIABILITY OR ANY OTHER ACTION ARISING OUT OF OR IN + * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. ADOBE WILL NOT + * PROVIDE ANY TRAINING OR OTHER SUPPORT FOR THE SOFTWARE. + * + * Adobe, PostScript, and Display PostScript are trademarks of Adobe Systems + * Incorporated which may be registered in certain jurisdictions + * + * Author: Adobe Systems Incorporated + */ +/* $XFree86$ */ + +#include <X11/IntrinsicP.h> +#include <X11/StringDefs.h> +#include <X11/ShellP.h> +#include <X11/Xproto.h> +#include <stdlib.h> +#include <Xm/Xm.h> + +/* There are no words to describe how I feel about having to do this */ + +#if XmVersion > 1001 +#include <Xm/ManagerP.h> +#else +#include <Xm/XmP.h> +#endif + +#include <Xm/DrawingA.h> +#include <Xm/ScrolledW.h> +#include <Xm/ScrollBar.h> + +#include <DPS/dpsXclient.h> +#include "dpsXcommonI.h" +#include <DPS/dpsXshare.h> +#include "DSWwraps.h" +#include <stdio.h> +#include <DPS/DPSScrollWP.h> + +#undef MIN +#define MIN(a, b) ((a) < (b) ? (a) : (b)) +#undef MAX +#define MAX(a, b) ((a) > (b) ? (a) : (b)) +#undef ABS +#define ABS(x) ((x) >= 0 ? (x) : -(x)) +#undef CEIL +#define CEIL(x) ((int) ((float)((int)(x)) == (x) ? (x) : (x) + 1)) + +/* Define macros to get rectangle entries. All rectangles are stored as + x, y, width, height. NOTE: ONLY FOR USER SPACE RECTANGLES, NOT X + RECTANGLES!!!! */ + +#define LEFT(r) ((r)[0]) +#define RIGHT(r) ((r)[0] + (r)[2]) +#define BOTTOM(r) ((r)[1]) +#define TOP(r) ((r)[1] + (r)[3]) +#define WIDTH(r) ((r)[2]) +#define HEIGHT(r) ((r)[3]) + +/* This is used in converting bounding boxes into user space to ensure + that we don't end up slopping over into another pixel */ + +#define DELTA .001 + +#define Offset(field) XtOffsetOf(DPSScrolledWindowRec, sw.field) + +static float initScale = 1.0; + +static XtResource resources[] = { + {XtNcontext, XtCContext, XtRDPSContext, sizeof(DPSContext), + Offset(context), XtRImmediate, (XtPointer) NULL}, + {XtNareaWidth, XtCAreaWidth, XtRInt, sizeof(int), + Offset(area_width), XtRImmediate, (XtPointer) ((int) (8.5*72))}, + {XtNareaHeight, XtCAreaHeight, XtRInt, sizeof(int), + Offset(area_height), XtRImmediate, (XtPointer) (11*72)}, + {XtNscale, XtCScale, XtRFloat, sizeof(float), + Offset(scale), XtRFloat, (XtPointer) &initScale}, + {XtNctm, XtCCtm, XtRFloatArray, sizeof(float *), + Offset(ctm_ptr), XtRImmediate, (XtPointer) NULL}, + {XtNinvCtm, XtCInvCtm, XtRFloatArray, sizeof(float *), + Offset(inv_ctm_ptr), XtRImmediate, (XtPointer) NULL}, + {XtNuseBackingPixmap, XtCUseBackingPixmap, XtRBoolean, sizeof(Boolean), + Offset(use_backing_pixmap), XtRImmediate, (XtPointer) True}, + {XtNuseFeedbackPixmap, XtCUseFeedbackPixmap, XtRBoolean, sizeof(Boolean), + Offset(use_feedback_pixmap), XtRImmediate, (XtPointer) True}, + {XtNbackingPixmap, XtCBackingPixmap, XtRPixmap, sizeof(Pixmap), + Offset(backing_pixmap), XtRImmediate, (XtPointer) None}, + {XtNfeedbackPixmap, XtCFeedbackPixmap, XtRPixmap, sizeof(Pixmap), + Offset(feedback_pixmap), XtRImmediate, (XtPointer) None}, + {XtNdocumentSizePixmaps, XtCDocumentSizePixmaps, + XtRBoolean, sizeof(Boolean), + Offset(document_size_pixmaps), XtRImmediate, (XtPointer) False}, + {XtNwindowGState, XtCWindowGState, XtRDPSGState, sizeof(DPSGState), + Offset(window_gstate), XtRImmediate, (XtPointer) 0}, + {XtNbackingGState, XtCBackingGState, XtRDPSGState, sizeof(DPSGState), + Offset(backing_gstate), XtRImmediate, (XtPointer) 0}, + {XtNfeedbackGState, XtCFeedbackGState, XtRDPSGState, sizeof(DPSGState), + Offset(feedback_gstate), XtRImmediate, (XtPointer) 0}, + {XtNdirtyAreas, XtCDirtyAreas, XtRFloatArray, sizeof(float *), + Offset(dirty_areas), XtRImmediate, (XtPointer) NULL}, + {XtNnumDirtyAreas, XtCNumDirtyAreas, XtRShort, sizeof(short), + Offset(num_dirty_areas), XtRImmediate, (XtPointer) 0}, + {XtNpixmapLimit, XtCPixmapLimit, XtRInt, sizeof(int), + Offset(pixmap_limit), XtRImmediate, (XtPointer) -1}, + {XtNabsolutePixmapLimit, XtCAbsolutePixmapLimit, XtRInt, sizeof(int), + Offset(absolute_pixmap_limit), XtRImmediate, (XtPointer) 0}, + {XtNwatchProgress, XtCWatchProgress, XtRBoolean, sizeof(Boolean), + Offset(watch_progress), XtRImmediate, (XtPointer) False}, + {XtNwatchProgressDelay, XtCWatchProgressDelay, XtRInt, sizeof(int), + Offset(watch_progress_delay), XtRImmediate, (XtPointer) 1000}, + {XtNminimalDrawing, XtCMinimalDrawing, XtRBoolean, sizeof(Boolean), + Offset(minimal_drawing), XtRImmediate, (XtPointer) False}, + {XtNapplicationScrolling, XtCApplicationScrolling, + XtRBoolean, sizeof(Boolean), + Offset(application_scrolling), XtRImmediate, (XtPointer) False}, + {XtNsetupCallback, XtCCallback, XtRCallback, sizeof(XtCallbackList), + Offset(setup_callback), XtRCallback, (XtPointer) NULL}, + {XtNexposeCallback, XtCCallback, XtRCallback, sizeof(XtCallbackList), + Offset(expose_callback), XtRCallback, (XtPointer) NULL}, + {XtNbackgroundCallback, XtCCallback, XtRCallback, sizeof(XtCallbackList), + Offset(background_callback), XtRCallback, (XtPointer) NULL}, + {XtNfeedbackCallback, XtCCallback, XtRCallback, sizeof(XtCallbackList), + Offset(feedback_callback), XtRCallback, (XtPointer) NULL}, + {XtNresizeCallback, XtCCallback, XtRCallback, sizeof(XtCallbackList), + Offset(resize_callback), XtRCallback, (XtPointer) NULL}, +}; + +static Boolean GiveFeedbackPixmap(Widget w, Pixmap p, int width, int height, int depth, Screen *screen); +static Boolean SetValues(Widget old, Widget req, Widget new, ArgList args, Cardinal *num_args); +static Boolean TakeFeedbackPixmap(Widget w, Pixmap *p, int *width, int *height, int *depth, Screen **screen); +static XtGeometryResult GeometryManager(Widget w, XtWidgetGeometry *desired, XtWidgetGeometry *allowed); +static XtGeometryResult QueryGeometry(Widget w, XtWidgetGeometry *desired, XtWidgetGeometry *allowed); +static void AbortPendingDrawing(Widget w); +static void AddExposureToPending(DPSScrolledWindowWidget dsw, XExposeEvent *ev); +static void AddRectsToDirtyArea(DPSScrolledWindowWidget dsw, float *newRect, int n); +static void AddRectsToPending(DPSScrolledWindowWidget dsw, int *newRect, int n); +static void AddToDirtyArea(Widget w, float *rect, long n); +static void AddUserSpaceRectsToPending(DPSScrolledWindowWidget dsw, float *newRect, int n); +static void CallFeedbackCallback(DPSScrolledWindowWidget dsw, float *r, int n); +static void CheckFeedbackPixmap(DPSScrolledWindowWidget dsw); +static void ClassPartInitialize(WidgetClass widget_class); +static void ConvertPSToX(Widget w, double psX, double psY, int *xX, int *xY); +static void ConvertToOrigPS(DPSScrolledWindowWidget dsw, int xX, int xY, float *psX, float *psY); +static void ConvertToPS(DPSScrolledWindowWidget dsw, float xX, float xY, float *psX, float *psY); +static void ConvertToX(DPSScrolledWindowWidget dsw, float psX, float psY, int *xX, int *xY); +static void ConvertXToPS(Widget w, long xX, long xY, float *psX, float *psY); +static void CopyRectsToCurrentDrawing(DPSScrolledWindowWidget dsw, float *newRect, int n); +static void CopyRectsToDirtyArea(DPSScrolledWindowWidget dsw, float *newRect, int n); +static void CopyToFeedbackPixmap(DPSScrolledWindowWidget dsw, float *rects, int n); +static void Destroy(Widget widget); +static void DrawingAreaExpose(Widget w, XtPointer clientData, XtPointer callData); +static void DrawingAreaGraphicsExpose(Widget w, XtPointer clientData, XEvent *event, Boolean *goOn); +static void EndFeedbackDrawing(Widget w, int restore); +static void FinishDrawing(DPSScrolledWindowWidget dsw); +static void FinishPendingDrawing(Widget w); +static void GetDrawingInfo(Widget w, DSWDrawableType *type, Drawable *drawable, DPSGState *gstate, DPSContext *context); +static void GetScrollInfo(Widget w, int *h_value, int *h_size, int *h_max, int *v_value, int *v_size, int *v_max); +static void HScrollCallback(Widget w, XtPointer clientData, XtPointer callData); +static void Initialize(Widget request, Widget new, ArgList args, Cardinal *num_args); +static void Realize(Widget w, XtValueMask *mask, XSetWindowAttributes *attr); +static void Resize(Widget w); +static void ScrollBy(Widget w, long dx, long dy); +static void ScrollMoved(DPSScrolledWindowWidget dsw); +static void ScrollPoint(Widget w, double psX, double psY, long xX, long xY); +static void ScrollTo(Widget w, long x, long y); +static void SetFeedbackDirtyArea(Widget w, float *rects, int count, XtPointer continue_feedback_data); +static void SetScale(Widget w, double scale, long fixedX, long fixedY); +static void SetScaleAndScroll(Widget w, double scale, double psX, double psY, long xX, long xY); +static void StartFeedbackDrawing(Widget w, XtPointer start_feedback_data); +static void UpdateDrawing(Widget w, float *rects, int count); +static void VScrollCallback(Widget w, XtPointer clientData, XtPointer callData); + +DPSScrolledWindowClassRec dpsScrolledWindowClassRec = { + /* Core class part */ + { + /* superclass */ (WidgetClass) &xmManagerClassRec, + /* class_name */ "DPSScrolledWindow", + /* widget_size */ sizeof(DPSScrolledWindowRec), + /* class_initialize */ NULL, + /* class_part_initialize */ ClassPartInitialize, + /* class_inited */ False, + /* initialize */ Initialize, + /* initialize_hook */ NULL, + /* realize */ Realize, + /* actions */ NULL, + /* num_actions */ 0, + /* resources */ resources, + /* num_resources */ XtNumber(resources), + /* xrm_class */ NULLQUARK, + /* compress_motion */ True, + /* compress_exposure */ XtExposeCompressMultiple, + /* compress_enterleave */ True, + /* visible_interest */ False, + /* destroy */ Destroy, + /* resize */ Resize, + /* expose */ NULL, + /* set_values */ SetValues, + /* set_values_hook */ NULL, + /* set_values_almost */ XtInheritSetValuesAlmost, + /* get_values_hook */ NULL, + /* accept_focus */ NULL, + /* version */ XtVersion, + /* callback offsets */ NULL, + /* tm_table */ NULL, + /* query_geometry */ QueryGeometry, + /* display_accelerator */ NULL, + /* extension */ NULL, + }, + /* Composite class part */ + { + /* geometry_manager */ GeometryManager, + /* change_managed */ NULL, + /* insert_child */ XtInheritInsertChild, + /* delete_child */ XtInheritDeleteChild, + /* extension */ NULL, + }, + /* Constraint class part */ + { + /* resources */ NULL, + /* num_resources */ 0, + /* constraint_size */ 0, + /* initialize */ NULL, + /* destroy */ NULL, + /* set_values */ NULL, + /* extension */ NULL, + }, + /* Manager class part */ + { + /* translations */ XtInheritTranslations, + /* syn_resources */ NULL, + /* num_syn_resources */ 0, + /* syn_constraint_resources */ NULL, + /* num_syn_constraint_resources */ 0, + /* parent_process */ XmInheritParentProcess, + /* extension */ NULL, + }, + /* DPSScrolledWindow class part */ + { + /* set_scale */ SetScale, + /* scroll_point */ ScrollPoint, + /* scroll_by */ ScrollBy, + /* scroll_to */ ScrollTo, + /* set_scale_and_scroll */ SetScaleAndScroll, + /* convert_x_to_ps */ ConvertXToPS, + /* convert_ps_to_x */ ConvertPSToX, + /* add_to_dirty_area */ AddToDirtyArea, + /* take_feedback_pixmap */ TakeFeedbackPixmap, + /* give_feedback_pixmap */ GiveFeedbackPixmap, + /* start_feedback_drawing */ StartFeedbackDrawing, + /* end_feedback_drawing */ EndFeedbackDrawing, + /* set_feedback_dirty_area */ SetFeedbackDirtyArea, + /* finish_pending_drawing */ FinishPendingDrawing, + /* abort_pending_drawing */ AbortPendingDrawing, + /* get_drawing_info */ GetDrawingInfo, + /* update_drawing */ UpdateDrawing, + /* get_scroll_info */ GetScrollInfo, + /* extension */ NULL, + } +}; + +WidgetClass dpsScrolledWindowWidgetClass = + (WidgetClass) &dpsScrolledWindowClassRec; + +/***** UTILITY FUNCTIONS *****/ + +static void PrintRectList(float *r, short num_r) +{ + int i; + + for (i = 0; i < num_r; i++) { + printf("Rectangle %d: ", i); + printf("X %g Y %g W %g H %g\n", r[0], r[1], r[2], r[3]); + r += 4; + } +} + +/* Make sure the list pointed to by r can hold n more rectangles. Always + grow by at least min_grow */ + +static void GrowRectList( + float **r, + short *r_size, + short num_r, + int n, int min_grow) +{ + if (*r_size < num_r + n) { + if (min_grow > 1 && num_r + n - *r_size < min_grow) { + *r_size += min_grow; + } else *r_size = num_r + n; + *r = (float *) XtRealloc((char *) *r, *r_size * 4 * sizeof(float)); + } +} + +static void GrowIntRectList( + int **r, + short *r_size, + short num_r, + int n, int min_grow) +{ + if (*r_size < num_r + n) { + if (min_grow > 1 && num_r + n - *r_size < min_grow) { + *r_size += min_grow; + } else *r_size = num_r + n; + *r = (int *) XtRealloc((char *) *r, *r_size * 4 * sizeof(int)); + } +} + +static Boolean Intersects(float *r1, float *r2) +{ + if (RIGHT(r1) <= LEFT(r2)) return False; + if (RIGHT(r2) <= LEFT(r1)) return False; + if (TOP(r1) <= BOTTOM(r2)) return False; + if (TOP(r2) <= BOTTOM(r1)) return False; + + return True; +} + +/* Subtract sub from src, putting result into dst. Return rectangle count */ + +static int Subtract(float *src, float *sub, float *dst) +{ + int n = 0; + + /* If bottom of sub is greater than bottom of src, there's a + rectangle across the bottom */ + if (BOTTOM(sub) > BOTTOM(src)) { + LEFT(dst) = LEFT(src); + BOTTOM(dst) = BOTTOM(src); + WIDTH(dst) = WIDTH(src); + HEIGHT(dst) = BOTTOM(sub) - BOTTOM(src); + n++; + dst += 4; + } + + /* If left of sub is greater than left of src, there's a left rectangle. */ + if (LEFT(sub) > LEFT(src)) { + LEFT(dst) = LEFT(src); + BOTTOM(dst) = MAX(BOTTOM(src), BOTTOM(sub)); + WIDTH(dst) = LEFT(sub) - LEFT(src); + HEIGHT(dst) = MIN(TOP(src), TOP(sub)) - BOTTOM(dst); + n++; + dst += 4; + } + + /* If right of sub is less than right of src, there's a right rect */ + if (RIGHT(sub) < RIGHT(src)) { + LEFT(dst) = RIGHT(sub); + BOTTOM(dst) = MAX(BOTTOM(src), BOTTOM(sub)); + WIDTH(dst) = RIGHT(src) - RIGHT(sub); + HEIGHT(dst) = MIN(TOP(src), TOP(sub)) - BOTTOM(dst); + n++; + dst += 4; + } + + /* If top of sub is less than top of src, there's a top rectangle */ + if (TOP(sub) < TOP(src)) { + LEFT(dst) = LEFT(src); + BOTTOM(dst) = TOP(sub); + WIDTH(dst) = WIDTH(src); + HEIGHT(dst) = TOP(src) - TOP(sub); + n++; + dst += 4; + } + + return n; +} + +static void Copy(float *src, float *dst) +{ + LEFT(dst) = LEFT(src); + BOTTOM(dst) = BOTTOM(src); + WIDTH(dst) = WIDTH(src); + HEIGHT(dst) = HEIGHT(src); +} + +static void Intersection(float *r1, float *r2, float *dst) +{ + LEFT(dst) = MAX(LEFT(r1), LEFT(r2)); + BOTTOM(dst) = MAX(BOTTOM(r1), BOTTOM(r2)); + WIDTH(dst) = MIN(RIGHT(r1), RIGHT(r2)) - LEFT(dst); + HEIGHT(dst) = MIN(TOP(r1), TOP(r2)) - BOTTOM(dst); +} + +/* These are used by the SubtractRects and IntersectRects procedures */ + +static float *rbuf = NULL; +static short rbuf_size = 0; +#define GROW_BUF 10 + +/* Replace the rectangle list in src with src minus sub */ + +static void SubtractRects( + float **src, + short *src_size, + short *num_src, + float *sub, + int num_sub) +{ + short num_rbuf; + float *r; + int i; + + /* Go through, subtracting the first sub rectangle from each src + rectangle. Put the result in the internal buffer, then copy this + list to the src. Repeat for each sub rectangle. */ + + while (num_sub > 0) { + num_rbuf = 0; + for (r = *src, i = 0; i < *num_src; r += 4, i++) { + if (Intersects(r, sub)) { + /* Subtract sub from r, putting result into rbuf. First + make sure there are at least 4 spaces in the buffer */ + GrowRectList(&rbuf, &rbuf_size, num_rbuf, 4, GROW_BUF); + + /* Do the subtraction */ + num_rbuf += Subtract(r, sub, rbuf + (num_rbuf*4)); + } else { + /* Copy r into buffer */ + GrowRectList(&rbuf, &rbuf_size, num_rbuf, 1, GROW_BUF); + Copy(r, rbuf + (num_rbuf*4)); + num_rbuf++; + } + } + + /* Copy buffered rectangles back into src */ + GrowRectList(src, src_size, 0, num_rbuf, 1); + for (i = 0; i < num_rbuf * 4; i++) (*src)[i] = rbuf[i]; + *num_src = num_rbuf; + + /* Check if we've taken everything away */ + if (*num_src == 0) return; + + /* Skip on to the next sub rectangle */ + num_sub--; + sub += 4; + } +} + +/* Replace list r1 with the intersection of r1 and r2 */ + +static void IntersectRects( + float **r1, + short *r1_size, + short *num_r1, + float *r2, + int num_r2) +{ + short num_rbuf = 0; + float *r; + int i; + + /* Fairly straightforward. Intersect each rectangle in r1 with each + rectangle in r2, then copy the results to r1 */ + + while (num_r2 > 0) { + for (r = *r1, i = 0; i < *num_r1; r += 4, i++) { + if (Intersects(r, r2)) { + GrowRectList(&rbuf, &rbuf_size, num_rbuf, 1, GROW_BUF); + Intersection(r, r2, rbuf + (num_rbuf*4)); + num_rbuf++; + } + } + num_r2--; + r2 += 4; + } + + /* Copy intersection rectangles back into r1 */ + GrowRectList(r1, r1_size, 0, num_rbuf, 1); + for (i = 0; i < num_rbuf * 4; i++) (*r1)[i] = rbuf[i]; + *num_r1 = num_rbuf; +} + +static void SimplifyRects(float *rect, short *num) +{ + int i, j, k; + float *r, *r1; + + i = 0; + while (i < *num) { + r = rect + (i * 4); + if (WIDTH(r) == 0 || HEIGHT(r) == 0) { + for (k = 4*(i+1); k < *num * 4; k++) rect[k-4] = rect[k]; + (*num)--; + goto LOOPEND; + } + j = i+1; + while (j < *num) { + r1 = rect + (j * 4); + if (TOP(r1) <= TOP(r) && BOTTOM(r1) >= BOTTOM(r) && + LEFT(r1) >= LEFT(r) && RIGHT(r1) <= RIGHT(r)) { + for (k = 4*(j+1); k < *num * 4; k++) rect[k-4] = rect[k]; + (*num)--; + } else if (TOP(r) <= TOP(r1) && BOTTOM(r) >= BOTTOM(r1) && + LEFT(r) >= LEFT(r1) && RIGHT(r) <= RIGHT(r1)) { + for (k = 4*(i+1); k < *num * 4; k++) rect[k-4] = rect[k]; + (*num)--; + goto LOOPEND; + } else j++; + } + i++; +LOOPEND:; + } +} + +static void ComputeOffsets(DPSScrolledWindowWidget dsw, int *dx, int *dy) +{ + if (dsw->sw.doing_feedback && dsw->sw.feedback_pixmap != None) { + *dx = *dy = 0; + } else { + if (dsw->sw.pixmap_width == dsw->sw.drawing_area->core.width) *dx = 0; + else *dx = -dsw->sw.origin_x; + if (dsw->sw.pixmap_height == dsw->sw.drawing_area->core.height) *dy = 0; + else *dy = CEIL(dsw->sw.drawing_height) - dsw->sw.origin_y; + } +} + +static void ClassPartInitialize(WidgetClass widget_class) +{ + register DPSScrolledWindowWidgetClass wc = + (DPSScrolledWindowWidgetClass) widget_class; + DPSScrolledWindowWidgetClass super = + (DPSScrolledWindowWidgetClass) wc->core_class.superclass; + + if (wc->sw_class.set_scale == InheritSetScale) { + wc->sw_class.set_scale = super->sw_class.set_scale; + } + if (wc->sw_class.scroll_point == InheritScrollPoint) { + wc->sw_class.scroll_point = super->sw_class.scroll_point; + } + if (wc->sw_class.scroll_by == InheritScrollBy) { + wc->sw_class.scroll_by = super->sw_class.scroll_by; + } + if (wc->sw_class.scroll_to == InheritScrollTo) { + wc->sw_class.scroll_to = super->sw_class.scroll_to; + } + if (wc->sw_class.set_scale_and_scroll == InheritSetScaleAndScroll) { + wc->sw_class.set_scale_and_scroll = + super->sw_class.set_scale_and_scroll; + } + if (wc->sw_class.convert_x_to_ps == InheritConvertXToPS) { + wc->sw_class.convert_x_to_ps = super->sw_class.convert_x_to_ps; + } + if (wc->sw_class.convert_ps_to_x == InheritConvertPSToX) { + wc->sw_class.convert_ps_to_x = super->sw_class.convert_ps_to_x; + } + if (wc->sw_class.add_to_dirty_area == InheritAddToDirtyArea) { + wc->sw_class.add_to_dirty_area = super->sw_class.add_to_dirty_area; + } + if (wc->sw_class.take_feedback_pixmap == InheritTakeFeedbackPixmap) { + wc->sw_class.take_feedback_pixmap = + super->sw_class.take_feedback_pixmap; + } + if (wc->sw_class.give_feedback_pixmap == InheritGiveFeedbackPixmap) { + wc->sw_class.give_feedback_pixmap = + super->sw_class.give_feedback_pixmap; + } + if (wc->sw_class.start_feedback_drawing == InheritStartFeedbackDrawing) { + wc->sw_class.start_feedback_drawing = + super->sw_class.start_feedback_drawing; + } + if (wc->sw_class.end_feedback_drawing == InheritEndFeedbackDrawing) { + wc->sw_class.end_feedback_drawing = + super->sw_class.end_feedback_drawing; + } + if (wc->sw_class.set_feedback_dirty_area == InheritSetFeedbackDirtyArea) { + wc->sw_class.set_feedback_dirty_area = + super->sw_class.set_feedback_dirty_area; + } + if (wc->sw_class.finish_pending_drawing == InheritFinishPendingDrawing) { + wc->sw_class.finish_pending_drawing = + super->sw_class.finish_pending_drawing; + } + if (wc->sw_class.abort_pending_drawing == InheritAbortPendingDrawing) { + wc->sw_class.abort_pending_drawing = + super->sw_class.abort_pending_drawing; + } + if (wc->sw_class.get_drawing_info == InheritGetDrawingInfo) { + wc->sw_class.get_drawing_info = super->sw_class.get_drawing_info; + } + if (wc->sw_class.update_drawing == InheritUpdateDrawing) { + wc->sw_class.update_drawing = super->sw_class.update_drawing; + } + if (wc->sw_class.get_scroll_info == InheritGetScrollInfo) { + wc->sw_class.get_scroll_info = super->sw_class.get_scroll_info; + } +} + +static void CreateChildren(DPSScrolledWindowWidget dsw) +{ + Widget w; + + w = dsw->sw.scrolled_window = + XtVaCreateManagedWidget("scrolledWindow", + xmScrolledWindowWidgetClass, + (Widget) dsw, + XtNwidth, dsw->core.width, + XtNheight, dsw->core.height, + XmNscrollingPolicy, XmAPPLICATION_DEFINED, + NULL); + + dsw->sw.h_scroll = + XtVaCreateManagedWidget("horizontalScrollBar", + xmScrollBarWidgetClass, w, + XmNorientation, XmHORIZONTAL, + NULL); + XtAddCallback(dsw->sw.h_scroll, XmNvalueChangedCallback, HScrollCallback, + (XtPointer) dsw); + XtAddCallback(dsw->sw.h_scroll, XmNdragCallback, HScrollCallback, + (XtPointer) dsw); + + dsw->sw.v_scroll = + XtVaCreateManagedWidget("verticalScrollBar", + xmScrollBarWidgetClass, w, + XmNorientation, XmVERTICAL, + NULL); + XtAddCallback(dsw->sw.v_scroll, XmNvalueChangedCallback, VScrollCallback, + (XtPointer) dsw); + XtAddCallback(dsw->sw.v_scroll, XmNdragCallback, VScrollCallback, + (XtPointer) dsw); + + + dsw->sw.drawing_area = + XtVaCreateManagedWidget("drawingArea", + xmDrawingAreaWidgetClass, w, NULL); + XtAddCallback(dsw->sw.drawing_area, XtNexposeCallback, DrawingAreaExpose, + (XtPointer) dsw); + XtAddRawEventHandler(dsw->sw.drawing_area, 0, True, + DrawingAreaGraphicsExpose, (XtPointer) dsw); + + XmScrolledWindowSetAreas(w, dsw->sw.h_scroll, dsw->sw.v_scroll, + dsw->sw.drawing_area); +} + +/* ARGSUSED */ + +static void Initialize(Widget request, Widget new, ArgList args, Cardinal *num_args) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) new; + XGCValues gcVal; + Bool inited; + + if (dsw->sw.area_width <= 0) dsw->sw.area_width = 8.5*72; + if (dsw->sw.area_height <= 0) dsw->sw.area_height = 11*72; + if (dsw->sw.scale <= 0) dsw->sw.scale = 1.0; + dsw->sw.ctm_ptr = dsw->sw.ctm; + dsw->sw.inv_ctm_ptr = dsw->sw.inv_ctm; + dsw->sw.backing_pixmap = None; + dsw->sw.feedback_pixmap = None; + dsw->sw.window_gstate = 0; + dsw->sw.backing_gstate = 0; + dsw->sw.feedback_gstate = 0; + dsw->sw.scrolling = False; + dsw->sw.num_pending_expose = dsw->sw.pending_expose_size = 0; + dsw->sw.pending_expose = NULL; + dsw->sw.num_pending_dirty = dsw->sw.pending_dirty_size = 0; + dsw->sw.pending_dirty = NULL; + dsw->sw.num_current_drawing = dsw->sw.current_drawing_size = 0; + dsw->sw.current_drawing = NULL; + dsw->sw.num_prev_dirty_areas = dsw->sw.prev_dirty_areas_size = 0; + dsw->sw.prev_dirty_areas = NULL; + dsw->sw.drawing_stage = DSWStart; + dsw->sw.work = 0; + dsw->sw.big_pixmap = False; + + /* Set the initial dirty area to everything */ + + dsw->sw.dirty_areas_size = 0; + dsw->sw.dirty_areas = NULL; + + GrowRectList(&dsw->sw.dirty_areas, &dsw->sw.dirty_areas_size, 0, 1, 1); + dsw->sw.num_dirty_areas = 1; + LEFT(dsw->sw.dirty_areas) = 0.0; + BOTTOM(dsw->sw.dirty_areas) = 0.0; + WIDTH(dsw->sw.dirty_areas) = dsw->sw.area_width; + HEIGHT(dsw->sw.dirty_areas) = dsw->sw.area_height; + + /* Make the scratch list have at least one element */ + + dsw->sw.num_scratch = dsw->sw.scratch_size = 0; + dsw->sw.scratch = NULL; + GrowRectList(&dsw->sw.scratch, &dsw->sw.scratch_size, 0, 1, 1); + + /* Get the context */ + + if (dsw->sw.context == NULL) { + dsw->sw.context = XDPSGetSharedContext(XtDisplay(dsw)); + } + + /* Watch progress only works with pass-through event dispatching */ + + if (dsw->sw.watch_progress && + XDPSSetEventDelivery(XtDisplay(dsw), dps_event_query) != + dps_event_pass_through) dsw->sw.watch_progress = False; + + if (_XDPSTestComponentInitialized(dsw->sw.context, + dps_init_bit_dsw, &inited) == + dps_status_unregistered_context) { + XDPSRegisterContext(dsw->sw.context, False); + } + + dsw->sw.use_saved_scroll = False; + dsw->sw.context_inited = False; + dsw->sw.doing_feedback = False; + dsw->sw.feedback_displayed = False; + + CreateChildren(dsw); + + dsw->sw.ge_gc = XtGetGC(dsw->sw.drawing_area, 0, (XGCValues *) NULL); + + gcVal.graphics_exposures = False; + dsw->sw.no_ge_gc = XtGetGC(dsw->sw.drawing_area, GCGraphicsExposures, + &gcVal); +} + +static void Destroy(Widget widget) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) widget; + + if (dsw->sw.backing_pixmap != None) { + XFreePixmap(XtDisplay(dsw), dsw->sw.backing_pixmap); + } + if (dsw->sw.feedback_pixmap != None) { + XFreePixmap(XtDisplay(dsw), dsw->sw.feedback_pixmap); + } + + if (dsw->sw.window_gstate != 0) { + XDPSFreeContextGState(dsw->sw.context, dsw->sw.window_gstate); + } + if (dsw->sw.backing_gstate != 0) { + XDPSFreeContextGState(dsw->sw.context, dsw->sw.backing_gstate); + } + if (dsw->sw.feedback_gstate != 0) { + XDPSFreeContextGState(dsw->sw.context, dsw->sw.feedback_gstate); + } + + if (dsw->sw.pending_expose != NULL) { + XtFree((char *) dsw->sw.pending_expose); + } + if (dsw->sw.current_drawing != NULL) { + XtFree((char *) dsw->sw.current_drawing); + } + if (dsw->sw.prev_dirty_areas != NULL) { + XtFree((char *) dsw->sw.prev_dirty_areas); + } + if (dsw->sw.dirty_areas != NULL) XtFree((char *) dsw->sw.dirty_areas); + if (dsw->sw.pending_dirty != NULL) XtFree((char *) dsw->sw.pending_dirty); + if (dsw->sw.scratch != NULL) XtFree((char *) dsw->sw.scratch); + + XtReleaseGC(widget, dsw->sw.ge_gc); + XtReleaseGC(widget, dsw->sw.no_ge_gc); +} + +static void SetOriginAndGetTransform(DPSScrolledWindowWidget dsw) +{ + float psX, psY; + + ConvertToOrigPS(dsw, dsw->sw.origin_x, dsw->sw.origin_y, &psX, &psY); + _DPSSWSetMatrixAndGetTransform(dsw->sw.context, psX, psY, dsw->sw.scale, + dsw->sw.origin_x, dsw->sw.origin_y, + dsw->sw.ctm, dsw->sw.inv_ctm, + &dsw->sw.x_offset, &dsw->sw.y_offset); +} + +static void SetPixmapOrigin(DPSScrolledWindowWidget dsw) +{ + float psX, psY; + + ConvertToOrigPS(dsw, dsw->sw.origin_x, dsw->sw.origin_y, &psX, &psY); + _DPSSWSetMatrix(dsw->sw.context, psX, psY, dsw->sw.scale, + dsw->sw.origin_x, dsw->sw.origin_y); +} + +static void SetPixmapOffset(DPSScrolledWindowWidget dsw) +{ + int ox, oy; + + if (dsw->sw.pixmap_width <= (int) dsw->sw.drawing_area->core.width) ox = 0; + else ox = -dsw->sw.origin_x; + if (dsw->sw.pixmap_height <= (int) dsw->sw.drawing_area->core.height) { + oy = dsw->sw.drawing_area->core.height; + } else oy = dsw->sw.pixmap_height - dsw->sw.origin_y + + dsw->sw.drawing_area->core.height; + + DPSsetXoffset(dsw->sw.context, ox, oy); +} + +static Boolean pixmapError; +static int (*oldHandler)(Display *, XErrorEvent *); + +static int PixmapHandler(Display *dpy, XErrorEvent *error) +{ + if (error->error_code == BadAlloc && + error->request_code == X_CreatePixmap) { + pixmapError = True; + return 0; + } else return (*oldHandler) (dpy, error); +} + +static Pixmap AllocPixmap(DPSScrolledWindowWidget dsw, unsigned w, unsigned h) +{ + Pixmap p; + unsigned int dBytes; + Widget wid = dsw->sw.drawing_area; + unsigned area = (w * h); + + if (dsw->sw.pixmap_limit > 0) { + if (area > (unsigned)dsw->sw.pixmap_limit) return None; + } else if (dsw->sw.pixmap_limit < 0 + && area > (unsigned)(dsw->sw.unscaled_width * dsw->sw.unscaled_height) + && area > (unsigned)(wid->core.width * wid->core.height)) return None; + + if (dsw->sw.absolute_pixmap_limit > 0) { + dBytes = (wid->core.depth + 7) / 8; /* Convert into bytes */ + if (area * dBytes > (unsigned)dsw->sw.absolute_pixmap_limit * 1024) { + return None; + } + } + + XSync(XtDisplay(dsw), False); + oldHandler = XSetErrorHandler(PixmapHandler); + pixmapError = False; + p = XCreatePixmap(XtDisplay(dsw), XtWindow(dsw->sw.drawing_area), w, h, + wid->core.depth); + XSync(XtDisplay(dsw), False); + (void) XSetErrorHandler(oldHandler); + if (pixmapError) return None; + else return p; +} + +static void CreateBackingPixmap(DPSScrolledWindowWidget dsw) +{ + Pixmap p; + + if (dsw->sw.document_size_pixmaps) { + dsw->sw.pixmap_width = + MAX(CEIL(dsw->sw.drawing_width), + (int) dsw->sw.drawing_area->core.width); + dsw->sw.pixmap_height = + MAX(CEIL(dsw->sw.drawing_height), + (int) dsw->sw.drawing_area->core.height); + + p = dsw->sw.backing_pixmap = + AllocPixmap(dsw, dsw->sw.pixmap_width, dsw->sw.pixmap_height); + if (p != None) { + dsw->sw.big_pixmap = + dsw->sw.pixmap_width > + (int) dsw->sw.drawing_area->core.width || + dsw->sw.pixmap_height > + (int) dsw->sw.drawing_area->core.height; + return; + } + } + dsw->sw.big_pixmap = False; + dsw->sw.pixmap_width = dsw->sw.drawing_area->core.width; + dsw->sw.pixmap_height = dsw->sw.drawing_area->core.height; + p = dsw->sw.backing_pixmap = + AllocPixmap(dsw, dsw->sw.pixmap_width, dsw->sw.pixmap_height); + if (p == None) dsw->sw.pixmap_width = dsw->sw.pixmap_height = 0; +} + +static void FreeBackingPixmap(DPSScrolledWindowWidget dsw) +{ + if (dsw->sw.backing_pixmap == None) return; + XFreePixmap(XtDisplay(dsw), dsw->sw.backing_pixmap); + dsw->sw.backing_pixmap = None; + dsw->sw.big_pixmap = False; + dsw->sw.pixmap_width = dsw->sw.pixmap_height = 0; + XDPSFreeContextGState(dsw->sw.context, dsw->sw.backing_gstate); +} + +static void SetDrawingAreaPosition( + DPSScrolledWindowWidget dsw, + float ix, + float iy, + int vx, + int vy, + Boolean setOrigin) +{ + int xoff, yoff; + int hSize, vSize; + float scrollX, scrollY; + + /* Convert ix, iy into X units */ + + ix *= dsw->sw.drawing_width / dsw->sw.area_width; + iy *= dsw->sw.drawing_height / dsw->sw.area_height; + + if ((int)dsw->sw.drawing_area->core.width >= CEIL(dsw->sw.drawing_width)) { + /* The scaled width is narrower than the view window, so + center the picture and set scroll bar to be unscrollable */ + + xoff = ((int) dsw->sw.drawing_area->core.width - + CEIL(dsw->sw.drawing_width)) + / 2.0; + scrollX = 0; + hSize = CEIL(dsw->sw.drawing_width); + } else { + /* The scaled width is larger than the view window, so + turn on the scroll bar, and set up its maximum and + slider size. Do this by converting the image offset into X + coordinates and subtracting the view offset */ + + scrollX = ix - vx; + scrollX = MAX(scrollX, 0); + scrollX = MIN(scrollX, CEIL(dsw->sw.drawing_width) - + (int) dsw->sw.drawing_area->core.width); + hSize = dsw->sw.drawing_area->core.width; + xoff = -(int) (scrollX + 0.5); + } + + /* Now do the same thing for the height. We want to compute the offset + relative to the lower left corner, but X coordinates are relative + to the upper left, so the drawing height must be added in. Also, since + the coordinates go in the other direction, the view offset must be + added, not subtracted. */ + + if ((int) dsw->sw.drawing_area->core.height >= + CEIL(dsw->sw.drawing_height)) { + yoff = ((int) dsw->sw.drawing_area->core.height - + CEIL(dsw->sw.drawing_height)) / 2.0; + scrollY = CEIL(dsw->sw.drawing_height) - + (int) dsw->sw.drawing_area->core.height; + vSize = CEIL(dsw->sw.drawing_height); + } else { + scrollY = iy + vy - (int) dsw->sw.drawing_area->core.height; + scrollY = MAX(scrollY, 0); + scrollY = MIN(scrollY, CEIL(dsw->sw.drawing_height) - + (int) dsw->sw.drawing_area->core.height); + vSize = dsw->sw.drawing_area->core.height; + yoff = -(int) (scrollY + 0.5); + } + + /* Update the scrollbars */ + dsw->sw.scroll_x = (int) (scrollX + 0.5); + dsw->sw.scroll_y = (int) (CEIL(dsw->sw.drawing_height) - + (int) dsw->sw.drawing_area->core.height - + scrollY + 0.5); + + yoff = dsw->sw.drawing_area->core.height - yoff; + + dsw->sw.scroll_h_value = dsw->sw.scroll_x; + dsw->sw.scroll_h_size = hSize; + dsw->sw.scroll_h_max = CEIL(dsw->sw.drawing_width); + dsw->sw.scroll_v_value = dsw->sw.scroll_y; + dsw->sw.scroll_v_size = vSize; + dsw->sw.scroll_v_max = CEIL(dsw->sw.drawing_height); + + if (!dsw->sw.application_scrolling) { + XtVaSetValues(dsw->sw.h_scroll, XmNmaximum, dsw->sw.scroll_h_max, + XmNvalue, dsw->sw.scroll_x, XmNsliderSize, hSize, NULL); + XtVaSetValues(dsw->sw.v_scroll, XmNmaximum, dsw->sw.scroll_v_max, + XmNvalue, dsw->sw.scroll_y, XmNsliderSize, vSize, NULL); + } + + if (setOrigin) { + /* Set the origin in the X window to reflect the new location */ + dsw->sw.origin_x = xoff; + dsw->sw.origin_y = yoff; + } +} + +static void DrawBackground( + DPSScrolledWindowWidget dsw, + DSWDrawableType which) +{ + DSWExposeCallbackRec e; + + e.type = which; + e.directions = DSWFinish; + e.results = DSWUndefined; + e.first = True; + e.background = True; + if (which == DSWBackingPixmap) { + e.drawable = dsw->sw.backing_pixmap; + e.gstate = dsw->sw.backing_gstate; + } else if (which == DSWFeedbackPixmap) { + e.drawable = dsw->sw.feedback_pixmap; + e.gstate = dsw->sw.feedback_gstate; + } else { + e.drawable = XtWindow(dsw->sw.drawing_area); + e.gstate = dsw->sw.window_gstate; + } + e.context = dsw->sw.context; + + SimplifyRects(dsw->sw.current_drawing, &dsw->sw.num_current_drawing); + + XDPSSetContextGState(dsw->sw.context, e.gstate); + _DPSSWSetRectViewClip(dsw->sw.context, dsw->sw.current_drawing, + dsw->sw.num_current_drawing * 4); + + e.rects = dsw->sw.current_drawing; + e.rect_count = dsw->sw.num_current_drawing; + + do { + XtCallCallbackList((Widget) dsw, dsw->sw.background_callback, + (XtPointer) &e); + if (e.results == DSWUndefined) { + if (XtHasCallbacks((Widget) dsw, XtNbackgroundCallback) != + XtCallbackHasNone) { + XtAppWarningMsg(XtWidgetToApplicationContext((Widget) dsw), + "returnError", "backgroundCallback", + "DPSScrollError", + "Background callback did not set result field", + (String *) NULL, (Cardinal *) NULL); + } + e.results = DSWFinished; + } + } while (e.results != DSWFinished); + + + DPSinitviewclip(dsw->sw.context); +} + +static void ClipToDrawingSize( + DPSScrolledWindowWidget dsw, + DSWDrawableType which) +{ + int i; + float r[4]; + + if (CEIL(dsw->sw.drawing_width) >= (int) dsw->sw.drawing_area->core.width && + CEIL(dsw->sw.drawing_height) >= (int) dsw->sw.drawing_area->core.height) return; + + /* Copy current drawing area to scratch */ + + GrowRectList(&dsw->sw.scratch, &dsw->sw.scratch_size, 0, + dsw->sw.num_current_drawing, 1); + dsw->sw.num_scratch = dsw->sw.num_current_drawing; + for (i = 0; i < dsw->sw.num_current_drawing * 4; i++) { + dsw->sw.scratch[i] = dsw->sw.current_drawing[i]; + } + + /* Construct a rectangle of the drawing area */ + + ConvertToPS(dsw, dsw->sw.origin_x + DELTA, dsw->sw.origin_y - DELTA, + r, r+1); + ConvertToPS(dsw, dsw->sw.origin_x + CEIL(dsw->sw.drawing_width) - DELTA, + dsw->sw.origin_y - CEIL(dsw->sw.drawing_height) + DELTA, + r+2, r+3); + r[2] -= r[0]; + r[3] -= r[1]; + + /* Subtract the area of the drawing from the current drawing list */ + + SubtractRects(&dsw->sw.current_drawing, &dsw->sw.current_drawing_size, + &dsw->sw.num_current_drawing, r, 1); + + if (dsw->sw.num_current_drawing != 0) { + DrawBackground(dsw, which); + /* Now intersect the rectangle with the current drawing area */ + IntersectRects(&dsw->sw.scratch, &dsw->sw.scratch_size, + &dsw->sw.num_scratch, r, 1); + /* If nothing left, we won't be drawing anything more, so + synchronize. Otherwise wait until we're done drawing */ + if (dsw->sw.num_scratch == 0) DPSWaitContext(dsw->sw.context); + } + + /* Copy scratch back into the current drawing list */ + GrowRectList(&dsw->sw.current_drawing, &dsw->sw.current_drawing_size, 0, + dsw->sw.num_scratch, 1); + dsw->sw.num_current_drawing = dsw->sw.num_scratch; + for (i = 0; i < dsw->sw.num_scratch * 4; i++) { + dsw->sw.current_drawing[i] = dsw->sw.scratch[i]; + } +} + +static DSWResults ClipAndDraw( + DPSScrolledWindowWidget dsw, + DSWDrawableType which, + DSWDirections howMuch, + Boolean first) +{ + DSWExposeCallbackRec e; + + e.type = which; + e.directions = howMuch; + e.results = DSWUndefined; + e.first = first; + e.background = False; + if (which == DSWBackingPixmap) { + e.drawable = dsw->sw.backing_pixmap; + e.gstate = dsw->sw.backing_gstate; + } else if (which == DSWFeedbackPixmap) { + e.drawable = dsw->sw.feedback_pixmap; + e.gstate = dsw->sw.feedback_gstate; + } else { + e.drawable = XtWindow(dsw->sw.drawing_area); + e.gstate = dsw->sw.window_gstate; + } + e.context = dsw->sw.context; + + if (first) { + XDPSSetContextGState(dsw->sw.context, e.gstate); + if (howMuch != DSWAbort) { + ClipToDrawingSize(dsw, which); + SimplifyRects(dsw->sw.current_drawing, + &dsw->sw.num_current_drawing); + if (dsw->sw.num_current_drawing == 0) return DSWFinished; + _DPSSWSetRectViewClip(dsw->sw.context, dsw->sw.current_drawing, + dsw->sw.num_current_drawing * 4); + } + } + + e.rects = dsw->sw.current_drawing; + e.rect_count = dsw->sw.num_current_drawing; + + do { + XtCallCallbackList((Widget) dsw, dsw->sw.expose_callback, + (XtPointer) &e); + if (e.results == DSWUndefined) { + if (XtHasCallbacks((Widget) dsw, + XtNexposeCallback) != XtCallbackHasNone) { + XtAppWarningMsg(XtWidgetToApplicationContext((Widget) dsw), + "returnError", "exposeCallback", + "DPSScrollError", + "Expose callback did not set result field", + (String *) NULL, (Cardinal *) NULL); + } + e.results = DSWFinished; + } + } while ((e.results != DSWFinished && howMuch == DSWFinish) || + (e.results != DSWFinished && e.results != DSWAborted && + howMuch == DSWAbortOrFinish) || + (e.results != DSWAborted && howMuch == DSWAbort)); + + if (e.results == DSWFinished) { + DPSinitviewclip(dsw->sw.context); + DPSWaitContext(dsw->sw.context); + } + return e.results; +} + +static void SplitExposeEvent( + DPSScrolledWindowWidget dsw, + XExposeEvent *ev) +{ + float *r; + float llx, lly, urx, ury; + int xr[4]; + int i; + int dx, dy; + + ComputeOffsets(dsw, &dx, &dy); + + /* Put the expose event into the scratch list */ + dsw->sw.num_scratch = 1; + r = dsw->sw.scratch; + ConvertToPS(dsw, ev->x + DELTA, ev->y + ev->height - DELTA, &llx, &lly); + ConvertToPS(dsw, ev->x + ev->width - DELTA, ev->y + DELTA, &urx, &ury); + LEFT(r) = llx; + BOTTOM(r) = lly; + WIDTH(r) = urx - llx; + HEIGHT(r) = ury - lly; + + /* Subtract the dirty area from the exposed area and copy the resulting + area to the window */ + SubtractRects(&dsw->sw.scratch, &dsw->sw.scratch_size, + &dsw->sw.num_scratch, + dsw->sw.dirty_areas, dsw->sw.num_dirty_areas); + for (i = 0; i < dsw->sw.num_scratch; i++) { + r = dsw->sw.scratch + 4*i; + ConvertToX(dsw, LEFT(r), TOP(r), xr, xr+1); + ConvertToX(dsw, RIGHT(r), BOTTOM(r), xr+2, xr+3); + xr[2] -= xr[0]; + xr[3] -= xr[1]; + XCopyArea(XtDisplay(dsw), dsw->sw.backing_pixmap, + XtWindow(dsw->sw.drawing_area), dsw->sw.no_ge_gc, + xr[0] + dx, xr[1] + dy, xr[2], xr[3], xr[0], xr[1]); + } + + /* Now do it again, but intersect the exposed area with the dirty area + and add the intersection to the pending list */ + + dsw->sw.num_scratch = 1; + r = dsw->sw.scratch; + LEFT(r) = llx; + BOTTOM(r) = lly; + WIDTH(r) = urx - llx; + HEIGHT(r) = ury - lly; + IntersectRects(&dsw->sw.scratch, &dsw->sw.scratch_size, + &dsw->sw.num_scratch, + dsw->sw.dirty_areas, dsw->sw.num_dirty_areas); + AddUserSpaceRectsToPending(dsw, dsw->sw.scratch, dsw->sw.num_scratch); +} + +/* ARGSUSED */ + +static Bool CheckWatchProgressEvent( + Display *dpy, + XEvent *e, + char *arg) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) arg; + + return (e->xany.window == dsw->sw.backing_pixmap && + (e->type == GraphicsExpose || e->type == NoExpose)) || + (e->xany.window == XtWindow(dsw->sw.drawing_area) && + e->type == Expose); +} + +static void CopyWindowToBackingPixmap( + DPSScrolledWindowWidget dsw) +{ + int llx, lly, urx, ury; + XEvent e; + XExposeEvent *ev = (XExposeEvent *) &e; + int i; + float *r; + int copies = 0; + int dx, dy; + + ComputeOffsets(dsw, &dx, &dy); + + for (i = 0; i < dsw->sw.num_dirty_areas; i++) { + r = dsw->sw.dirty_areas + i*4; + ConvertToX(dsw, LEFT(r), BOTTOM(r), &llx, &lly); + ConvertToX(dsw, RIGHT(r), TOP(r), &urx, &ury); + XCopyArea(XtDisplay(dsw), XtWindow(dsw->sw.drawing_area), + dsw->sw.backing_pixmap, dsw->sw.ge_gc, + llx, ury, urx-llx, lly-ury, llx + dx, ury + dy); + copies++; + } + + /* Unfortunately the Intrinsics won't let us get ahold of the the + GraphicsExpose events for the pixmap, so we have to wait and + get them the old fashioned way. Yuck. */ + + while (copies > 0) { + XIfEvent(XtDisplay(dsw), &e, CheckWatchProgressEvent, + (char *) dsw); + if (e.type == Expose) { + SplitExposeEvent(dsw, ev); + continue; + } else if (e.type == GraphicsExpose) { + ev->x -= dx; + ev->y -= dy; + AddExposureToPending(dsw, ev); + if (ev->count == 0) copies--; + } else copies--; /* NoExpose */ + } + CopyRectsToCurrentDrawing(dsw, dsw->sw.pending_dirty, + dsw->sw.num_pending_dirty); + + dsw->sw.num_pending_dirty = 0; + dsw->sw.num_pending_expose = 0; + if (dsw->sw.num_current_drawing == 0) { + dsw->sw.drawing_stage = DSWDone; + dsw->sw.num_dirty_areas = 0; + } else { + /* The dirty area is now the intersection of the old dirty area and + the newly-created current drawing list */ + IntersectRects(&dsw->sw.dirty_areas, &dsw->sw.dirty_areas_size, + &dsw->sw.num_dirty_areas, + dsw->sw.current_drawing, dsw->sw.num_current_drawing); + } +} + +/* Subtract the window area from the dirty area, and make the + result be the new current drawing list */ + +static void SetCurrentDrawingToBackground( + DPSScrolledWindowWidget dsw) +{ + int i; + float r[4]; + + ConvertToPS(dsw, 0 + DELTA, dsw->sw.drawing_area->core.height - DELTA, + r, r+1); + ConvertToPS(dsw, dsw->sw.drawing_area->core.width - DELTA, 0 + DELTA, + r+2, r+3); + r[2] -= r[0]; + r[3] -= r[1]; + + SubtractRects(&dsw->sw.dirty_areas, &dsw->sw.dirty_areas_size, + &dsw->sw.num_dirty_areas, r, 1); + + GrowRectList(&dsw->sw.current_drawing, &dsw->sw.current_drawing_size, + 0, dsw->sw.num_dirty_areas, 1); + for (i = 0; i < 4 * dsw->sw.num_dirty_areas; i++) { + dsw->sw.current_drawing[i] = dsw->sw.dirty_areas[i]; + } + dsw->sw.num_current_drawing = dsw->sw.num_dirty_areas; +} + +static void CopyPendingExpose(DPSScrolledWindowWidget dsw) +{ + int dx, dy; + int i; + int *r; + + ComputeOffsets(dsw, &dx, &dy); + + for (i = 0; i < dsw->sw.num_pending_expose; i++) { + r = dsw->sw.pending_expose + 4*i; + XCopyArea(XtDisplay(dsw), dsw->sw.backing_pixmap, + XtWindow(dsw->sw.drawing_area), + dsw->sw.no_ge_gc, + LEFT(r) + dx, BOTTOM(r) + dy, WIDTH(r), HEIGHT(r), + LEFT(r), BOTTOM(r)); + } + dsw->sw.num_pending_expose = dsw->sw.num_pending_dirty = 0; +} + +static void UpdateWindowFromBackingPixmap( + DPSScrolledWindowWidget dsw, + float *rects, + int n) +{ + int dx, dy; + int llx, lly, urx, ury; + int i; + float *r; + + ComputeOffsets(dsw, &dx, &dy); + + for (i = 0; i < n; i++) { + r = rects + 4*i; + ConvertToX(dsw, LEFT(r), BOTTOM(r), &llx, &lly); + ConvertToX(dsw, RIGHT(r), TOP(r), &urx, &ury); + + XCopyArea(XtDisplay(dsw), dsw->sw.backing_pixmap, + XtWindow(dsw->sw.drawing_area), + dsw->sw.no_ge_gc, + llx+dx-1, ury+dy-1, urx-llx+2, lly-ury+2, llx-1, ury-1); + } +} + +static void UpdateWindowFromFeedbackPixmap( + DPSScrolledWindowWidget dsw, + float *rects, + int n) +{ + int llx, lly, urx, ury; + int i; + float *r; + + for (i = 0; i < n; i++) { + r = rects + (i * 4); + ConvertToX(dsw, LEFT(r), BOTTOM(r), &llx, &lly); + ConvertToX(dsw, RIGHT(r), TOP(r), &urx, &ury); + + XCopyArea(XtDisplay(dsw), dsw->sw.feedback_pixmap, + XtWindow(dsw->sw.drawing_area), dsw->sw.no_ge_gc, + llx-1, ury-1, urx-llx+2, lly-ury+2, llx-1, ury-1); + } +} + +/* This is the heart of the drawing code; it does one piece of drawing. + It can be called either directly or as a work procedure */ + +static Boolean DoDrawing(XtPointer clientData) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) clientData; + DSWResults results; + DSWDrawableType which; + + if (dsw->sw.drawing_stage == DSWStart && dsw->sw.watch_progress && + dsw->sw.backing_pixmap != None && dsw->sw.num_current_drawing == 0) { + dsw->sw.drawing_stage = DSWDrewVisible; + CopyWindowToBackingPixmap(dsw); + } + + switch (dsw->sw.drawing_stage) { + case DSWStart: + case DSWDrawingVisible: + if (dsw->sw.watch_progress || dsw->sw.backing_pixmap == None) { + which = DSWWindow; + } else which = DSWBackingPixmap; + results = ClipAndDraw(dsw, which, DSWDrawSome, + (dsw->sw.drawing_stage == DSWStart)); + if (results == DSWFinished) { + if (dsw->sw.watch_progress && dsw->sw.backing_pixmap != None) { + dsw->sw.drawing_stage = DSWDrewVisible; + CopyWindowToBackingPixmap(dsw); + } else { + if (dsw->sw.minimal_drawing && dsw->sw.big_pixmap) { + dsw->sw.drawing_stage = DSWDrewVisible; + SetCurrentDrawingToBackground(dsw); + } else { + dsw->sw.drawing_stage = DSWDone; + dsw->sw.num_dirty_areas = 0; + } + if (dsw->sw.num_pending_expose != 0 && + dsw->sw.backing_pixmap != None) { + CopyPendingExpose(dsw); + } + } + } else dsw->sw.drawing_stage = DSWDrawingVisible; + break; + + case DSWDrewVisible: + case DSWDrawingBackground: + results = ClipAndDraw(dsw, DSWBackingPixmap, DSWDrawSome, + (dsw->sw.drawing_stage == DSWDrewVisible)); + if (results == DSWFinished) { + dsw->sw.drawing_stage = DSWDone; + dsw->sw.num_dirty_areas = 0; + } + else dsw->sw.drawing_stage = DSWDrawingBackground; + break; + + case DSWDone: + break; + } + + if (dsw->sw.drawing_stage == DSWDone && dsw->sw.num_pending_dirty != 0) { + CopyRectsToCurrentDrawing(dsw, dsw->sw.pending_dirty, + dsw->sw.num_pending_dirty); + CopyRectsToDirtyArea(dsw, dsw->sw.pending_dirty, + dsw->sw.num_pending_dirty); + dsw->sw.num_pending_dirty = 0; + dsw->sw.num_pending_expose = 0; + dsw->sw.drawing_stage = DSWStart; + } + + if (dsw->sw.drawing_stage == DSWDone) { + dsw->sw.work = 0; + if (dsw->sw.watch_progress) { + /* Some of the background drawing may have been to areas that + are visible */ + UpdateWindowFromBackingPixmap(dsw, dsw->sw.current_drawing, + dsw->sw.num_current_drawing); + } + dsw->sw.num_current_drawing = 0; + if (dsw->sw.scrolling) { + dsw->sw.scrolling = False; + ScrollMoved(dsw); + } + return True; + } else return False; +} + +static void StartDrawing(DPSScrolledWindowWidget dsw) +{ + float r[4]; + + CopyRectsToCurrentDrawing(dsw, dsw->sw.dirty_areas, + dsw->sw.num_dirty_areas); + + if (dsw->sw.watch_progress || dsw->sw.backing_pixmap == None) { + /* Intersect the current drawing area with the pending dirty area + (The pending dirty area represents the window exposures that + have happened so far) */ + IntersectRects(&dsw->sw.current_drawing, &dsw->sw.current_drawing_size, + &dsw->sw.num_current_drawing, + dsw->sw.pending_dirty, dsw->sw.num_pending_dirty); + dsw->sw.num_pending_dirty = dsw->sw.num_pending_expose = 0; + } else { + if (!dsw->sw.big_pixmap || dsw->sw.minimal_drawing) { + /* Intersect the current drawing area to the window to start */ + ConvertToPS(dsw, 0 + DELTA, + dsw->sw.drawing_area->core.height - DELTA, r, r+1); + ConvertToPS(dsw, dsw->sw.drawing_area->core.width - DELTA, + 0 + DELTA, r+2, r+3); + r[2] -= r[0]; + r[3] -= r[1]; + IntersectRects(&dsw->sw.current_drawing, + &dsw->sw.current_drawing_size, + &dsw->sw.num_current_drawing, r, 1); + } + } + + if (dsw->sw.num_current_drawing == 0 && !dsw->sw.watch_progress) { + dsw->sw.drawing_stage = DSWFinished; + dsw->sw.num_dirty_areas = 0; + return; + } + + dsw->sw.drawing_stage = DSWStart; + if (!DoDrawing((XtPointer) dsw)) { + dsw->sw.work = + XtAppAddWorkProc(XtWidgetToApplicationContext((Widget) dsw), + DoDrawing, (XtPointer) dsw); + } +} + +static void RedisplaySliver(DPSScrolledWindowWidget dsw, int deltaX, int deltaY) +{ + float r[8]; + int xr[8]; + int n; + int xllx, xlly, xurx, xury; + float llx, lly, urx, ury; + + /* If one of the deltas is 0, then the area to update is just a + single rectangle. */ + if (deltaX == 0 || deltaY == 0) { + if (deltaX == 0) { + /* Just a single horizontal rectangle */ + + xllx = 0; + xurx = dsw->sw.drawing_area->core.width; + if (deltaY > 0) { + xlly = dsw->sw.drawing_area->core.height; + xury = dsw->sw.drawing_area->core.height - deltaY; + } else { + xlly = -deltaY; + xury = 0; + } + + } else if (deltaY == 0) { + /* Just a single vertical rectangle */ + xlly = dsw->sw.drawing_area->core.height; + xury = 0; + if (deltaX > 0) { + xllx = dsw->sw.drawing_area->core.width - deltaX; + xurx = dsw->sw.drawing_area->core.width; + } else { + xllx = 0; + xurx = -deltaX; + } + } + /* Convert the rectangle into PS coordinates */ + ConvertToPS(dsw, xllx + DELTA, xlly - DELTA, &llx, &lly); + ConvertToPS(dsw, xurx - DELTA, xury + DELTA, &urx, &ury); + r[0] = llx; + r[1] = lly; + r[2] = urx - llx; + r[3] = ury - lly; + xr[0] = xllx; + xr[1] = xury; + xr[2] = xurx - xllx; + xr[3] = xlly - xury; + n = 1; + + } else { + /* Scrolling in both directions, so there are two rectangles. + It's easiest to do if we let them overlap; fortunately that is + legal! First do the horizontal rectangle. */ + xllx = 0; + xurx = dsw->sw.drawing_area->core.width; + if (deltaY > 0) { + xlly = dsw->sw.drawing_area->core.height; + xury = dsw->sw.drawing_area->core.height - deltaY; + } else { + xlly = -deltaY; + xury = 0; + } + ConvertToPS(dsw, xllx + DELTA, xlly - DELTA, &llx, &lly); + ConvertToPS(dsw, xurx - DELTA, xury + DELTA, &urx, &ury); + + /* Store in point array */ + r[0] = llx; + r[1] = lly; + r[2] = urx - llx; + r[3] = ury - lly; + xr[0] = xllx; + xr[1] = xury; + xr[2] = xurx - xllx; + xr[3] = xlly - xury; + + /* Now do vertical rectangle and store in point array */ + xlly = dsw->sw.drawing_area->core.height; + xury = 0; + if (deltaX > 0) { + xllx = dsw->sw.drawing_area->core.width - deltaX; + xurx = dsw->sw.drawing_area->core.width; + } else { + xllx = 0; + xurx = -deltaX; + } + ConvertToPS(dsw, xllx + DELTA, xlly - DELTA, &llx, &lly); + ConvertToPS(dsw, xurx - DELTA, xury + DELTA, &urx, &ury); + r[4] = llx; + r[5] = lly; + r[6] = urx - llx; + r[7] = ury - lly; + xr[4] = xllx; + xr[5] = xury; + xr[6] = xurx - xllx; + xr[7] = xlly - xury; + n = 2; + } + + AddRectsToDirtyArea(dsw, r, n); + AddRectsToPending(dsw, xr, n); + StartDrawing(dsw); +} + +static void SetUpInitialPixmap(DPSScrolledWindowWidget dsw) +{ + float *r = dsw->sw.dirty_areas; + int llx, lly, urx, ury; + + CreateBackingPixmap(dsw); + if (dsw->sw.backing_pixmap != None) { + XDPSSetContextDrawable(dsw->sw.context, dsw->sw.backing_pixmap, + dsw->sw.pixmap_height); + + SetPixmapOffset(dsw); + SetPixmapOrigin(dsw); + XDPSCaptureContextGState(dsw->sw.context, &dsw->sw.backing_gstate); + + if (dsw->sw.pixmap_width != CEIL(dsw->sw.drawing_width) || + dsw->sw.pixmap_height != CEIL(dsw->sw.drawing_height)) { + + /* Make the dirty area match the window */ + if (dsw->sw.pixmap_width > (int)dsw->sw.drawing_area->core.width) { + llx = dsw->sw.origin_x; + urx = llx + CEIL(dsw->sw.drawing_width); + } else { + llx = 0; + urx = dsw->sw.drawing_area->core.width; + } + if (dsw->sw.pixmap_height > + (int) dsw->sw.drawing_area->core.height) { + lly = dsw->sw.origin_y; + ury = dsw->sw.origin_y - CEIL(dsw->sw.drawing_height); + } else { + lly = dsw->sw.drawing_area->core.height; + ury = 0; + } + ConvertToPS(dsw, llx + DELTA, lly - DELTA, r, r+1); + ConvertToPS(dsw, urx - DELTA, ury + DELTA, r+2, r+3); + r[2] -= r[0]; + r[3] -= r[1]; + dsw->sw.num_dirty_areas = 1; + } + if (dsw->sw.doing_feedback) { + CopyRectsToCurrentDrawing(dsw, dsw->sw.dirty_areas, + dsw->sw.num_dirty_areas); + FinishDrawing(dsw); + } else if (!dsw->sw.watch_progress) StartDrawing(dsw); + } +} + +/* ARGSUSED */ + +static void TimerStart(XtPointer clientData, XtIntervalId *id) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) clientData; + + if (dsw->sw.drawing_stage == DSWStart) StartDrawing(dsw); +} + +static void SetUpInitialInformation(DPSScrolledWindowWidget dsw) +{ + int i; + float llx, lly, urx, ury; + float xScale, yScale; + XExposeEvent ev; + XStandardColormap colorCube, grayRamp; + int match; + + /* If the context's colormap matches the widget's colormap, assume that + everything is already set up right in the color cube department. This + allows an application to supply us with a custom color cube by + installing it in the context before calling us */ + + _DPSSWColormapMatch(dsw->sw.context, + dsw->sw.drawing_area->core.colormap, &match); + + if (match) { + XDPSSetContextParameters(dsw->sw.context, XtScreen(dsw), + dsw->sw.drawing_area->core.depth, + XtWindow(dsw->sw.drawing_area), + dsw->sw.drawing_area->core.height, NULL, NULL, + XDPSContextScreenDepth | XDPSContextDrawable); + } else { + grayRamp.colormap = colorCube.colormap = + dsw->sw.drawing_area->core.colormap; + + XDPSCreateStandardColormaps(XtDisplay(dsw), XtWindow(dsw), + (Visual *) NULL, 0, 0, 0, 0, + &colorCube, &grayRamp, False); + + XDPSSetContextParameters(dsw->sw.context, XtScreen(dsw), + dsw->sw.drawing_area->core.depth, + XtWindow(dsw->sw.drawing_area), + dsw->sw.drawing_area->core.height, + (XDPSStandardColormap *) &colorCube, + (XDPSStandardColormap *) &grayRamp, + XDPSContextScreenDepth | XDPSContextDrawable | + XDPSContextRGBMap | XDPSContextGrayMap); + } + + DPSinitgraphics(dsw->sw.context); + _DPSSWGetTransform(dsw->sw.context, dsw->sw.ctm, dsw->sw.orig_inv_ctm); + dsw->sw.x_offset = 0; + dsw->sw.y_offset = dsw->sw.drawing_area->core.height; + for (i = 0; i < 6; i++) dsw->sw.inv_ctm[i] = dsw->sw.orig_inv_ctm[i]; + + ConvertToPS(dsw, 0.0, 100.0, &llx, &lly); + ConvertToPS(dsw, 100.0, 0.0, &urx, &ury); + xScale = ABS(100.0 / (urx - llx)); + yScale = ABS(100.0 / (ury - lly)); + + if (dsw->sw.scale != 1.0) { + DPSscale(dsw->sw.context, dsw->sw.scale, dsw->sw.scale); + _DPSSWGetTransform(dsw->sw.context, dsw->sw.ctm, dsw->sw.inv_ctm); + } + + dsw->sw.drawing_width = dsw->sw.area_width * xScale * dsw->sw.scale; + dsw->sw.drawing_height = dsw->sw.area_height * yScale * dsw->sw.scale; + + dsw->sw.unscaled_width = dsw->sw.drawing_width / dsw->sw.scale + 1; + dsw->sw.unscaled_height = dsw->sw.drawing_height / dsw->sw.scale + 1; + + if (!dsw->sw.use_saved_scroll) { + dsw->sw.scroll_pic_x = dsw->sw.area_width / 2; + dsw->sw.scroll_pic_y = dsw->sw.area_height / 2; + dsw->sw.scroll_win_x = dsw->sw.drawing_area->core.width / 2; + dsw->sw.scroll_win_y = dsw->sw.drawing_area->core.height / 2; + } + + SetDrawingAreaPosition(dsw, dsw->sw.scroll_pic_x, dsw->sw.scroll_pic_y, + dsw->sw.scroll_win_x, dsw->sw.scroll_win_y, True); + SetOriginAndGetTransform(dsw); + XDPSCaptureContextGState(dsw->sw.context, &dsw->sw.window_gstate); + + dsw->sw.drawing_stage = DSWStart; + + if (dsw->sw.use_backing_pixmap) SetUpInitialPixmap(dsw); + + if (dsw->sw.doing_feedback) return; + + if (dsw->sw.watch_progress || dsw->sw.backing_pixmap == None) { + /* If watching progress or no pixmap, clear the window to ensure + that things get started */ + XClearArea(XtDisplay(dsw), XtWindow(dsw->sw.drawing_area), + 0, 0, 0, 0, True); + XSync(XtDisplay(dsw), False); + if (dsw->sw.watch_progress && dsw->sw.watch_progress_delay > 0) { + /* Set a timer so that we start drawing if nothing is visible */ + (void) XtAppAddTimeOut(XtWidgetToApplicationContext((Widget) dsw), + dsw->sw.watch_progress_delay, + TimerStart, (XtPointer) dsw); + } + } else { + /* Put a synthetic expose event in the pending queue */ + ev.x = ev.y = 0; + ev.width = dsw->sw.drawing_area->core.width; + ev.height = dsw->sw.drawing_area->core.height; + SplitExposeEvent(dsw, &ev); + } +} + +static void Realize( + Widget w, + XtValueMask *mask, + XSetWindowAttributes *attr) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + DSWSetupCallbackRec setup; + + /* Let my parent do all the hard work */ + (*dpsScrolledWindowClassRec.core_class.superclass->core_class.realize) + (w, mask, attr); + + /* We delay calling the setup callback so that the caller can use + XtAddCallback to add it */ + setup.context = dsw->sw.context; + XtCallCallbackList((Widget) dsw, dsw->sw.setup_callback, + (XtPointer) &setup); + + /* Now, explicitly realize my children */ + XtRealizeWidget(dsw->sw.scrolled_window); + + /* Et voila, now we have windows! */ + SetUpInitialInformation(dsw); +} + +static void AbortOrFinish(DPSScrolledWindowWidget dsw) +{ + DSWResults results; + DSWDrawableType which; + + if (dsw->sw.work != 0) { + XtRemoveWorkProc(dsw->sw.work); + dsw->sw.work = 0; + } + + switch (dsw->sw.drawing_stage) { + case DSWStart: + return; + /* break; */ + + case DSWDrawingVisible: + if (dsw->sw.watch_progress || dsw->sw.backing_pixmap == None) { + which = DSWWindow; + } else which = DSWBackingPixmap; + results = ClipAndDraw(dsw, which, DSWAbortOrFinish, False); + if (results == DSWAborted) { + dsw->sw.drawing_stage = DSWStart; + if (dsw->sw.backing_pixmap == None || dsw->sw.watch_progress) { + /* Add the current drawing area back into the pending + expose area */ + AddUserSpaceRectsToPending(dsw, dsw->sw.current_drawing, + dsw->sw.num_current_drawing); + } + return; + } + if (dsw->sw.watch_progress && dsw->sw.backing_pixmap != None) { + dsw->sw.drawing_stage = DSWDrewVisible; + CopyWindowToBackingPixmap(dsw); + if (dsw->sw.num_current_drawing != 0) { + results = ClipAndDraw(dsw, DSWBackingPixmap, + DSWAbortOrFinish, True); + } + if (results == DSWAborted) { + dsw->sw.drawing_stage = DSWStart; + return; + } + } else { + if (dsw->sw.backing_pixmap != None) { + if (dsw->sw.num_pending_expose != 0) { + CopyPendingExpose(dsw); + } + + if (dsw->sw.minimal_drawing && dsw->sw.big_pixmap) { + dsw->sw.drawing_stage = DSWDrewVisible; + SetCurrentDrawingToBackground(dsw); + results = ClipAndDraw(dsw, which, + DSWAbortOrFinish, True); + if (results == DSWAborted) { + dsw->sw.drawing_stage = DSWStart; + return; + } + } + } + } + break; + + case DSWDrewVisible: + case DSWDrawingBackground: + results = ClipAndDraw(dsw, DSWBackingPixmap, DSWAbortOrFinish, + (dsw->sw.drawing_stage == DSWDrewVisible)); + if (results == DSWAborted) { + dsw->sw.drawing_stage = DSWStart; + return; + } + break; + + case DSWDone: + break; + } + + dsw->sw.drawing_stage = DSWDone; + dsw->sw.num_dirty_areas = 0; + return; +} + +static void AbortDrawing(DPSScrolledWindowWidget dsw) +{ + DSWDrawableType which; + + if (dsw->sw.work != 0) { + XtRemoveWorkProc(dsw->sw.work); + dsw->sw.work = 0; + } + + switch (dsw->sw.drawing_stage) { + case DSWStart: + case DSWDone: + case DSWDrewVisible: + break; + + case DSWDrawingVisible: + if (dsw->sw.watch_progress || dsw->sw.backing_pixmap == None) { + which = DSWWindow; + } else which = DSWBackingPixmap; + (void) ClipAndDraw(dsw, which, DSWAbort, False); + break; + + case DSWDrawingBackground: + (void) ClipAndDraw(dsw, DSWBackingPixmap, DSWAbort, False); + break; + + } + + dsw->sw.num_pending_expose = dsw->sw.num_pending_dirty = 0; +} + +static void FinishDrawing(DPSScrolledWindowWidget dsw) +{ + DSWDrawableType which; + + if (dsw->sw.work != 0) { + XtRemoveWorkProc(dsw->sw.work); + dsw->sw.work = 0; + } + + switch (dsw->sw.drawing_stage) { + case DSWStart: + case DSWDrawingVisible: + if (dsw->sw.watch_progress || dsw->sw.backing_pixmap == None) { + which = DSWWindow; + } else which = DSWBackingPixmap; + if (dsw->sw.drawing_stage == DSWStart) { + ClipToDrawingSize(dsw, which); + if (dsw->sw.num_current_drawing == 0) return; + } + (void) ClipAndDraw(dsw, which, DSWFinish, + dsw->sw.drawing_stage == DSWStart); + if (dsw->sw.watch_progress && dsw->sw.backing_pixmap != None) { + dsw->sw.drawing_stage = DSWDrewVisible; + CopyWindowToBackingPixmap(dsw); + if (dsw->sw.num_current_drawing != 0) { + (void) ClipAndDraw(dsw, DSWBackingPixmap, DSWFinish, True); + } + } else { + if (dsw->sw.backing_pixmap != None) { + if (dsw->sw.num_pending_expose != 0) { + CopyPendingExpose(dsw); + } + + if (dsw->sw.minimal_drawing && dsw->sw.big_pixmap) { + dsw->sw.drawing_stage = DSWDrewVisible; + SetCurrentDrawingToBackground(dsw); + (void) ClipAndDraw(dsw, which, DSWFinish, True); + } + } + } + break; + + case DSWDrewVisible: + case DSWDrawingBackground: + (void) ClipAndDraw(dsw, DSWBackingPixmap, DSWFinish, + (dsw->sw.drawing_stage == DSWDrewVisible)); + break; + + case DSWDone: + break; + } + + dsw->sw.drawing_stage = DSWDone; + dsw->sw.num_dirty_areas = 0; +} + +static void DoScroll( + DPSScrolledWindowWidget dsw, + int deltaX, int deltaY) +{ + /* Set the PS origin in the X window to the new settings of + the scrollbars */ + dsw->sw.origin_x -= deltaX; + dsw->sw.origin_y -= deltaY; + + /* Update the graphics states for the window and backing pixmap to + reflect new origin */ + (void) XDPSSetContextGState(dsw->sw.context, dsw->sw.window_gstate); + SetOriginAndGetTransform(dsw); + (void) XDPSUpdateContextGState(dsw->sw.context, dsw->sw.window_gstate); + + if (dsw->sw.backing_pixmap != None && !dsw->sw.big_pixmap) { + (void) XDPSSetContextGState(dsw->sw.context, dsw->sw.backing_gstate); + SetPixmapOrigin(dsw); + (void) XDPSUpdateContextGState(dsw->sw.context, + dsw->sw.backing_gstate); + } + + /* Update the stored position of the scroll bars */ + dsw->sw.scroll_x += deltaX; + dsw->sw.scroll_y += deltaY; +} + +static void ShiftPendingExpose( + DPSScrolledWindowWidget dsw, + int deltaX, int deltaY) +{ + int i; + int *r; + + for (i = 0; i < dsw->sw.num_pending_expose; i++) { + r = dsw->sw.pending_expose + 4*i; + r[0] -= deltaX; + r[1] -= deltaY; + } +} + +static void HScrollCallback( + Widget w, + XtPointer clientData, XtPointer callData) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) clientData; + XmScrollBarCallbackStruct *sb = (XmScrollBarCallbackStruct *) callData; + + if (!dsw->sw.application_scrolling) { + dsw->sw.scroll_h_value = sb->value; + ScrollMoved(dsw); + } +} + +static void VScrollCallback( + Widget w, + XtPointer clientData, XtPointer callData) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) clientData; + XmScrollBarCallbackStruct *sb = (XmScrollBarCallbackStruct *) callData; + + if (!dsw->sw.application_scrolling) { + dsw->sw.scroll_v_value = sb->value; + ScrollMoved(dsw); + } +} + +/* ARGSUSED */ + +static void ScrollMoved(DPSScrolledWindowWidget dsw) +{ + int deltaX, deltaY; + + /* If we haven't started drawing yet, it must be because we're waiting + for GraphicsExpose events. Delay scrolling until they come in */ + if (dsw->sw.scrolling && dsw->sw.drawing_stage == DSWStart) return; + + /* Calculate the delta in the scrolling */ + deltaX = dsw->sw.scroll_h_value - dsw->sw.scroll_x; + deltaY = dsw->sw.scroll_v_value - dsw->sw.scroll_y; + + /* If there is some scrolling to do, then scroll the pixmap and + copy the pixmap to the window */ + if (deltaX == 0 && deltaY == 0) return; + + ShiftPendingExpose(dsw, deltaX, deltaY); + + AbortOrFinish(dsw); + + DoScroll(dsw, deltaX, deltaY); + + if (!dsw->sw.big_pixmap) { + /* Copy visible area to new location */ + if (dsw->sw.backing_pixmap != None) { + XCopyArea(XtDisplay(dsw), dsw->sw.backing_pixmap, + dsw->sw.backing_pixmap, dsw->sw.no_ge_gc, + deltaX, deltaY, dsw->sw.drawing_area->core.width, + dsw->sw.drawing_area->core.height, 0, 0); + if (!dsw->sw.doing_feedback || dsw->sw.feedback_pixmap == None) { + XCopyArea(XtDisplay(dsw), dsw->sw.backing_pixmap, + XtWindow(dsw->sw.drawing_area), dsw->sw.no_ge_gc, + 0, 0, dsw->sw.drawing_area->core.width, + dsw->sw.drawing_area->core.height, 0, 0); + } + RedisplaySliver(dsw, deltaX, deltaY); + } else { + if (!dsw->sw.doing_feedback || dsw->sw.feedback_pixmap == None) { + XCopyArea(XtDisplay(dsw), XtWindow(dsw->sw.drawing_area), + XtWindow(dsw->sw.drawing_area), dsw->sw.ge_gc, + deltaX, deltaY, dsw->sw.drawing_area->core.width, + dsw->sw.drawing_area->core.height, 0, 0); + } + if (dsw->sw.doing_feedback) RedisplaySliver(dsw, deltaX, deltaY); + else dsw->sw.drawing_stage = DSWStart; + } + } + + if (dsw->sw.doing_feedback) { + float *r; + + FinishDrawing(dsw); + + r = dsw->sw.prev_dirty_areas; + ConvertToPS(dsw, 0 + DELTA, dsw->sw.drawing_area->core.height - DELTA, + r, r+1); + ConvertToPS(dsw, dsw->sw.drawing_area->core.width - DELTA, 0 + DELTA, + r+2, r+3); + r[2] -= r[0]; + r[3] -= r[1]; + dsw->sw.num_prev_dirty_areas = 1; + + if (dsw->sw.feedback_pixmap != None) { + XDPSSetContextDrawable(dsw->sw.context, dsw->sw.feedback_pixmap, + dsw->sw.drawing_area->core.height); + SetPixmapOrigin(dsw); + XDPSCaptureContextGState(dsw->sw.context, + &dsw->sw.feedback_gstate); + + /* Initialize the feedback pixmap with a copy of the drawing */ + if (dsw->sw.backing_pixmap != None) { + CopyToFeedbackPixmap(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + } else { + CopyRectsToCurrentDrawing(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + (void) ClipAndDraw(dsw, DSWFeedbackPixmap, DSWFinish, True); + } + if (!dsw->sw.feedback_displayed) { + XCopyArea(XtDisplay(dsw), dsw->sw.feedback_pixmap, + XtWindow(dsw->sw.drawing_area), + dsw->sw.no_ge_gc, 0, 0, + dsw->sw.drawing_area->core.width, + dsw->sw.drawing_area->core.height, 0, 0); + } + } + + if (dsw->sw.feedback_displayed) { + CallFeedbackCallback(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + } + if (dsw->sw.feedback_pixmap != None) { + UpdateWindowFromFeedbackPixmap(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + } + dsw->sw.num_pending_dirty = dsw->sw.num_pending_expose = 0; + + } else { + if (dsw->sw.backing_pixmap != None && + dsw->sw.drawing_stage == DSWDone) { + ComputeOffsets(dsw, &deltaX, &deltaY); + if (!dsw->sw.big_pixmap) dsw->sw.scrolling = True; + + XCopyArea(XtDisplay(dsw), dsw->sw.backing_pixmap, + XtWindow(dsw->sw.drawing_area), dsw->sw.no_ge_gc, + deltaX, deltaY, + dsw->sw.drawing_area->core.width, + dsw->sw.drawing_area->core.height, 0, 0); + } else dsw->sw.scrolling = True; + } +} + +static void AddExposureToPending( + DPSScrolledWindowWidget dsw, + XExposeEvent *ev) +{ + float *f; + int *i; + + if (dsw->sw.backing_pixmap == None || dsw->sw.watch_progress || + dsw->sw.doing_feedback) { + GrowRectList(&dsw->sw.pending_dirty, &dsw->sw.pending_dirty_size, + dsw->sw.num_pending_dirty, 1, 1); + + f = dsw->sw.pending_dirty + (dsw->sw.num_pending_dirty * 4); + ConvertToPS(dsw, ev->x + DELTA, ev->y + ev->height - DELTA, f, f+1); + ConvertToPS(dsw, ev->x + ev->width - DELTA, ev->y + DELTA, f+2, f+3); + f[2] -= f[0]; + f[3] -= f[1]; + dsw->sw.num_pending_dirty++; + } + + GrowIntRectList(&dsw->sw.pending_expose, &dsw->sw.pending_expose_size, + dsw->sw.num_pending_expose, 1, 1); + + i = dsw->sw.pending_expose + (dsw->sw.num_pending_expose * 4); + i[0] = ev->x; + i[1] = ev->y; + i[2] = ev->width; + i[3] = ev->height; + dsw->sw.num_pending_expose++; +} + +static void AddRectsToPending( + DPSScrolledWindowWidget dsw, + int *newRect, + int n) +{ + int *r; + int i; + float *f; + + if (dsw->sw.backing_pixmap == None || dsw->sw.watch_progress) { + GrowRectList(&dsw->sw.pending_dirty, &dsw->sw.pending_dirty_size, + dsw->sw.num_pending_dirty, n, 1); + + for (i = 0; i < n; i++) { + f = dsw->sw.pending_dirty + (dsw->sw.num_pending_dirty * 4); + r = newRect + (i * 4); + ConvertToPS(dsw, r[0] + DELTA, r[1] + r[3] - DELTA, f, f+1); + ConvertToPS(dsw, r[0] + r[2] - DELTA, r[1] + DELTA, f+2, f+3); + f[2] -= f[0]; + f[3] -= f[1]; + dsw->sw.num_pending_dirty++; + } + } + + GrowIntRectList(&dsw->sw.pending_expose, &dsw->sw.pending_expose_size, + dsw->sw.num_pending_expose, n, 1); + + r = dsw->sw.pending_expose + (dsw->sw.num_pending_expose * 4); + for (i = 0; i < 4*n; i++) r[i] = newRect[i]; + dsw->sw.num_pending_expose += n; +} + +static void AddUserSpaceRectsToPending( + DPSScrolledWindowWidget dsw, + float *newRect, + int n) +{ + int *r; + int i; + float *f; + + if (dsw->sw.backing_pixmap == None || dsw->sw.watch_progress) { + GrowRectList(&dsw->sw.pending_dirty, &dsw->sw.pending_dirty_size, + dsw->sw.num_pending_dirty, n, 1); + + f = dsw->sw.pending_dirty + (dsw->sw.num_pending_dirty * 4); + for (i = 0; i < 4*n; i++) f[i] = newRect[i]; + dsw->sw.num_pending_dirty += n; + } + + GrowIntRectList(&dsw->sw.pending_expose, &dsw->sw.pending_expose_size, + dsw->sw.num_pending_expose, n, 1); + + for (i = 0; i < n; i++) { + r = dsw->sw.pending_expose + (dsw->sw.num_pending_expose * 4); + f = newRect + (i * 4); + ConvertToX(dsw, LEFT(f), TOP(f), r, r+1); + ConvertToX(dsw, RIGHT(f), BOTTOM(f), r+2, r+3); + r[2] -= r[0]; + r[3] -= r[1]; + dsw->sw.num_pending_expose++; + } +} + +static void CopyRectsToCurrentDrawing( + DPSScrolledWindowWidget dsw, + float *newRect, + int n) +{ + float *r; + int i; + + GrowRectList(&dsw->sw.current_drawing, &dsw->sw.current_drawing_size, + 0, n, 1); + + r = dsw->sw.current_drawing; + for (i = 0; i < 4*n; i++) r[i] = newRect[i]; + dsw->sw.num_current_drawing = n; +} + +static void CopyRectsToDirtyArea( + DPSScrolledWindowWidget dsw, + float *newRect, + int n) +{ + float *r; + int i; + + GrowRectList(&dsw->sw.dirty_areas, &dsw->sw.dirty_areas_size, 0, n, 1); + + r = dsw->sw.dirty_areas; + for (i = 0; i < 4*n; i++) r[i] = newRect[i]; + dsw->sw.num_dirty_areas = n; +} + +static void AddRectsToDirtyArea( + DPSScrolledWindowWidget dsw, + float *newRect, + int n) +{ + float *r; + int i; + + GrowRectList(&dsw->sw.dirty_areas, &dsw->sw.dirty_areas_size, + dsw->sw.num_dirty_areas, n, 1); + + r = dsw->sw.dirty_areas + (4 * dsw->sw.num_dirty_areas); + for (i = 0; i < 4*n; i++) r[i] = newRect[i]; + dsw->sw.num_dirty_areas += n; +} + +static void CopyRectsToPrevDirtyArea( + DPSScrolledWindowWidget dsw, + float *newRect, + int n) +{ + float *r; + int i; + + GrowRectList(&dsw->sw.prev_dirty_areas, + &dsw->sw.prev_dirty_areas_size, 0, n, 1); + + r = dsw->sw.prev_dirty_areas; + for (i = 0; i < 4*n; i++) r[i] = newRect[i]; + dsw->sw.num_prev_dirty_areas = n; +} + +/* ARGSUSED */ + +static void DrawingAreaGraphicsExpose( + Widget w, + XtPointer clientData, + XEvent *event, + Boolean *goOn) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) clientData; + XExposeEvent *ev = (XExposeEvent *) event; + + switch (event->type) { + case GraphicsExpose: + /* GraphicsExpose occur during unbuffered scrolling */ + if (dsw->sw.backing_pixmap == None && dsw->sw.scrolling) { + /* Unbuffered scrolling case */ + AddExposureToPending(dsw, ev); + + if (ev->count == 0) { + AddRectsToDirtyArea(dsw, dsw->sw.pending_dirty, + dsw->sw.num_pending_dirty); + StartDrawing(dsw); + dsw->sw.num_pending_dirty = dsw->sw.num_pending_expose = 0; + } + } + break; + } +} + +static Boolean MoreExposes(Widget w) +{ + XEvent event; + + if (XPending(XtDisplay(w)) > 0) { + if (XCheckTypedWindowEvent(XtDisplay(w), XtWindow(w), + Expose, &event)) { + XPutBackEvent(XtDisplay(w), &event); + return True;; + } + } + return False; +} + +static void DrawingAreaExpose( + Widget w, + XtPointer clientData, XtPointer callData) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) clientData; + XmDrawingAreaCallbackStruct *d = (XmDrawingAreaCallbackStruct *) callData; + XExposeEvent *ev = (XExposeEvent *) d->event; + int dx, dy; + + if (dsw->sw.doing_feedback) { + if (dsw->sw.feedback_pixmap != None) { + XCopyArea(XtDisplay(dsw), dsw->sw.feedback_pixmap, + XtWindow(dsw->sw.drawing_area), + dsw->sw.no_ge_gc, + ev->x, ev->y, ev->width, ev->height, ev->x, ev->y); + } else { + if (dsw->sw.backing_pixmap != None) { + ComputeOffsets(dsw, &dx, &dy); + + XCopyArea(XtDisplay(dsw), dsw->sw.backing_pixmap, + XtWindow(dsw->sw.drawing_area), + dsw->sw.no_ge_gc, ev->x + dx, ev->y + dy, + ev->width, ev->height, ev->x, ev->y); + } + AddExposureToPending(dsw, ev); + if (ev->count != 0 || MoreExposes(w)) return; + + if (dsw->sw.backing_pixmap == None) { + CopyRectsToCurrentDrawing(dsw, dsw->sw.pending_dirty, + dsw->sw.num_pending_dirty); + dsw->sw.drawing_stage = DSWStart; + FinishDrawing(dsw); + } + if (dsw->sw.feedback_displayed) { + CallFeedbackCallback(dsw, dsw->sw.pending_dirty, + dsw->sw.num_pending_dirty); + } + dsw->sw.num_pending_dirty = dsw->sw.num_pending_expose = 0; + } + return; + } + + if (dsw->sw.backing_pixmap != None) { + if (dsw->sw.drawing_stage == DSWStart && dsw->sw.watch_progress) { + SplitExposeEvent(dsw, ev); + if (ev->count == 0) { + if (MoreExposes(w)) return; + StartDrawing(dsw); + dsw->sw.num_pending_dirty = dsw->sw.num_pending_expose = 0; + } + return; + } + + if (dsw->sw.drawing_stage < DSWDrewVisible) { + SplitExposeEvent(dsw, ev); + return; + } + ComputeOffsets(dsw, &dx, &dy); + + XCopyArea(XtDisplay(dsw), dsw->sw.backing_pixmap, + XtWindow(dsw->sw.drawing_area), + dsw->sw.no_ge_gc, + ev->x + dx, ev->y + dy, ev->width, ev->height, ev->x, ev->y); + } else { + AddExposureToPending(dsw, ev); + if (ev->count == 0) { + if (MoreExposes(w)) return; + if (dsw->sw.drawing_stage == DSWDone || + dsw->sw.drawing_stage == DSWStart) { + CopyRectsToDirtyArea(dsw, dsw->sw.pending_dirty, + dsw->sw.num_pending_dirty); + StartDrawing(dsw); + dsw->sw.num_pending_dirty = dsw->sw.num_pending_expose = 0; + } + } + } +} + +static void Resize(Widget w) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + DSWResizeCallbackRec r; + float x, y; + + if (XtIsRealized(w)) (void) AbortOrFinish(dsw); + + r.oldw = dsw->sw.scrolled_window->core.width; + r.oldh = dsw->sw.scrolled_window->core.height; + r.neww = dsw->core.width; + r.newh = dsw->core.height; + r.x = r.y = 0; + + XtCallCallbackList(w, dsw->sw.resize_callback, (XtPointer) &r); + + if (XtIsRealized(w)) { + ConvertToPS(dsw, (float) r.x, (float) r.y, &x, &y); + } else if (r.x != 0 || r.y != 0) ScrollBy(w, r.x, r.y); + + XtResizeWidget(dsw->sw.scrolled_window, w->core.width, w->core.height, 0); + + if (!XtIsRealized(w)) return; + + if (dsw->sw.backing_pixmap != None && + dsw->sw.pixmap_width == CEIL(dsw->sw.drawing_width) && + dsw->sw.pixmap_height == CEIL(dsw->sw.drawing_height) && + dsw->sw.pixmap_width >= (int) dsw->sw.drawing_area->core.width && + dsw->sw.pixmap_height >= (int) dsw->sw.drawing_area->core.width) { + + XDPSSetContextGState(dsw->sw.context, dsw->sw.window_gstate); + DPSinitclip(dsw->sw.context); + DPSinitviewclip(dsw->sw.context); + SetDrawingAreaPosition(dsw, x, y, r.x, r.y, True); + SetOriginAndGetTransform(dsw); + XDPSUpdateContextGState(dsw->sw.context, dsw->sw.window_gstate); + XClearArea(XtDisplay(dsw), XtWindow(dsw->sw.drawing_area), + 0, 0, 0, 0, True); + } else { + dsw->sw.use_saved_scroll = True; + dsw->sw.scroll_pic_x = x; + dsw->sw.scroll_pic_y = y; + dsw->sw.scroll_win_x = r.x; + dsw->sw.scroll_win_y = r.y; + + if (dsw->sw.backing_pixmap != None) { + XFreePixmap(XtDisplay(dsw), dsw->sw.backing_pixmap); + XDPSFreeContextGState(dsw->sw.context, dsw->sw.backing_gstate); + } + dsw->sw.backing_pixmap = None; + dsw->sw.big_pixmap = False; + dsw->sw.pixmap_width = dsw->sw.pixmap_height = 0; + + dsw->sw.num_dirty_areas = 1; + LEFT(dsw->sw.dirty_areas) = 0.0; + BOTTOM(dsw->sw.dirty_areas) = 0.0; + WIDTH(dsw->sw.dirty_areas) = dsw->sw.area_width; + HEIGHT(dsw->sw.dirty_areas) = dsw->sw.area_height; + + SetUpInitialInformation(dsw); + } + + if (dsw->sw.doing_feedback) { + float *r; + int dx, dy; + + CheckFeedbackPixmap(dsw); + r = dsw->sw.prev_dirty_areas; + ConvertToPS(dsw, 0 + DELTA, dsw->sw.drawing_area->core.height - DELTA, + r, r+1); + ConvertToPS(dsw, dsw->sw.drawing_area->core.width - DELTA, 0 + DELTA, + r+2, r+3); + r[2] -= r[0]; + r[3] -= r[1]; + dsw->sw.num_prev_dirty_areas = 1; + + if (dsw->sw.feedback_pixmap != None) { + /* Initialize the feedback pixmap with a copy of the drawing */ + if (dsw->sw.backing_pixmap != None) { + CopyToFeedbackPixmap(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + } else { + CopyRectsToCurrentDrawing(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + (void) ClipAndDraw(dsw, DSWFeedbackPixmap, DSWFinish, True); + } + XCopyArea(XtDisplay(dsw), dsw->sw.feedback_pixmap, + XtWindow(dsw->sw.drawing_area), + dsw->sw.no_ge_gc, 0, 0, + dsw->sw.drawing_area->core.width, + dsw->sw.drawing_area->core.height, 0, 0); + } else { + if (dsw->sw.backing_pixmap != None) { + ComputeOffsets(dsw, &dx, &dy); + + XCopyArea(XtDisplay(dsw), dsw->sw.backing_pixmap, + XtWindow(dsw->sw.drawing_area), + dsw->sw.no_ge_gc, dx, dy, + dsw->sw.drawing_area->core.width, + dsw->sw.drawing_area->core.height, 0, 0); + } else { + CopyRectsToCurrentDrawing(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + dsw->sw.drawing_stage = DSWStart; + FinishDrawing(dsw); + } + } + if (dsw->sw.feedback_displayed) { + CallFeedbackCallback(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + } + if (dsw->sw.feedback_pixmap != None) { + UpdateWindowFromFeedbackPixmap(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + } + dsw->sw.num_pending_dirty = dsw->sw.num_pending_expose = 0; + } +} + +static void CheckFeedbackPixmap(DPSScrolledWindowWidget dsw) +{ + if (dsw->sw.feedback_pixmap != None && + (dsw->sw.feedback_width < (int) dsw->sw.drawing_area->core.width || + dsw->sw.feedback_height < (int) dsw->sw.drawing_area->core.height)) { + XFreePixmap(XtDisplay(dsw), dsw->sw.feedback_pixmap); + dsw->sw.feedback_pixmap = None; + dsw->sw.feedback_width = dsw->sw.feedback_height = 0; + } + if (dsw->sw.use_feedback_pixmap && dsw->sw.feedback_pixmap == None) { + dsw->sw.feedback_pixmap = + AllocPixmap(dsw, dsw->sw.drawing_area->core.width, + dsw->sw.drawing_area->core.height); + if (dsw->sw.feedback_pixmap != None) { + dsw->sw.feedback_width = dsw->sw.drawing_area->core.width; + dsw->sw.feedback_height = dsw->sw.drawing_area->core.height; + } + } + if (dsw->sw.feedback_pixmap != None) { + XDPSSetContextDrawable(dsw->sw.context, dsw->sw.feedback_pixmap, + dsw->sw.drawing_area->core.height); + SetPixmapOrigin(dsw); + XDPSCaptureContextGState(dsw->sw.context, &dsw->sw.feedback_gstate); + } +} + +static void UpdateGStates(DPSScrolledWindowWidget dsw) +{ + /* Create graphics states for the window and backing pixmap in + the new context */ + XDPSSetContextDrawable(dsw->sw.context, XtWindow(dsw->sw.drawing_area), + dsw->sw.drawing_area->core.height); + DPSinitgraphics(dsw->sw.context); + if (dsw->sw.scale != 1.0) { + DPSscale(dsw->sw.context, dsw->sw.scale, dsw->sw.scale); + } + + SetOriginAndGetTransform(dsw); + (void) XDPSCaptureContextGState(dsw->sw.context, &dsw->sw.window_gstate); + if (dsw->sw.backing_pixmap != None) { + XDPSSetContextDrawable(dsw->sw.context, dsw->sw.backing_pixmap, + dsw->sw.pixmap_height); + + SetPixmapOffset(dsw); + SetPixmapOrigin(dsw); + XDPSCaptureContextGState(dsw->sw.context, &dsw->sw.backing_gstate); + } +} + +static void CheckPixmapSize(DPSScrolledWindowWidget dsw) +{ + Boolean freeIt = False; + int w = dsw->sw.pixmap_width, h = dsw->sw.pixmap_height; + Widget wid = dsw->sw.drawing_area; + unsigned int dBytes; + + if (dsw->sw.pixmap_limit > 0) { + if (w * h > dsw->sw.pixmap_limit) freeIt = True; + } else if (dsw->sw.pixmap_limit < 0 && + w * h > dsw->sw.unscaled_width * dsw->sw.unscaled_height && + w * h > (int) wid->core.width * (int) wid->core.height) { + freeIt = True; + } + + if (dsw->sw.absolute_pixmap_limit > 0) { + dBytes = (wid->core.depth + 7) / 8; /* Convert into bytes */ + if (w * h * dBytes > (unsigned)dsw->sw.absolute_pixmap_limit * 1024) { + freeIt = True; + } + } + if (freeIt) { + XFreePixmap(XtDisplay(dsw), dsw->sw.backing_pixmap); + dsw->sw.backing_pixmap = None; + dsw->sw.big_pixmap = False; + dsw->sw.pixmap_width = dsw->sw.pixmap_height = 0; + XDPSFreeContextGState(dsw->sw.context, dsw->sw.backing_gstate); + } +} + +static void ResizeArea(DPSScrolledWindowWidget dsw) +{ + AbortDrawing(dsw); + + /* Make everything dirty */ + dsw->sw.num_dirty_areas = 1; + LEFT(dsw->sw.dirty_areas) = 0.0; + BOTTOM(dsw->sw.dirty_areas) = 0.0; + WIDTH(dsw->sw.dirty_areas) = dsw->sw.area_width; + HEIGHT(dsw->sw.dirty_areas) = dsw->sw.area_height; + + if (dsw->sw.big_pixmap) { + XFreePixmap(XtDisplay(dsw), dsw->sw.backing_pixmap); + dsw->sw.backing_pixmap = None; + dsw->sw.big_pixmap = False; + dsw->sw.pixmap_width = dsw->sw.pixmap_height = 0; + XDPSFreeContextGState(dsw->sw.context, dsw->sw.backing_gstate); + } + + if (!dsw->sw.use_saved_scroll) { + /* Keep the upper left in the same place */ + dsw->sw.scroll_win_x = 0; + dsw->sw.scroll_win_y = 0; + ConvertToPS(dsw, 0.0, 0.0, + &dsw->sw.scroll_pic_x, &dsw->sw.scroll_pic_y); + dsw->sw.use_saved_scroll = True; + } + + SetUpInitialInformation(dsw); +} + +static void ClearDirtyAreas(DPSScrolledWindowWidget dsw) +{ + int i; + float *r; + int llx, lly, urx, ury; + + for (i = 0; i < dsw->sw.num_dirty_areas; i++) { + r = dsw->sw.dirty_areas + (i * 4); + ConvertToX(dsw, LEFT(r), BOTTOM(r), &llx, &lly); + ConvertToX(dsw, RIGHT(r), TOP(r), &urx, &ury); + XClearArea(XtDisplay(dsw), XtWindow(dsw->sw.drawing_area), + llx, ury, urx-llx, lly-ury, True); + } +} + +static void HandleFeedbackPixmapChange(DPSScrolledWindowWidget dsw) +{ + if (!dsw->sw.use_feedback_pixmap) { + /* Get rid of one if we have it */ + if (dsw->sw.feedback_pixmap != None) { + XFreePixmap(XtDisplay(dsw), dsw->sw.feedback_pixmap); + dsw->sw.feedback_pixmap = None; + dsw->sw.feedback_width = dsw->sw.feedback_height = 0; + } + } else { + if (dsw->sw.doing_feedback) { + float *r; + + CheckFeedbackPixmap(dsw); + if (dsw->sw.feedback_pixmap == None) return; + + r = dsw->sw.prev_dirty_areas; + ConvertToPS(dsw, 0 + DELTA, + dsw->sw.drawing_area->core.height - DELTA, r, r+1); + ConvertToPS(dsw, dsw->sw.drawing_area->core.width - DELTA, + 0 + DELTA, r+2, r+3); + r[2] -= r[0]; + r[3] -= r[1]; + dsw->sw.num_prev_dirty_areas = 1; + + /* Initialize the feedback pixmap with a copy of the drawing */ + if (dsw->sw.backing_pixmap != None) { + CopyToFeedbackPixmap(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + } else { + CopyRectsToCurrentDrawing(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + (void) ClipAndDraw(dsw, DSWFeedbackPixmap, DSWFinish, True); + } + if (dsw->sw.feedback_displayed) { + CallFeedbackCallback(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + } + } + } +} + +/* ARGSUSED */ + +static Boolean SetValues( + Widget old, Widget req, Widget new, + ArgList args, + Cardinal *num_args) +{ + DPSScrolledWindowWidget olddsw = (DPSScrolledWindowWidget) old; + DPSScrolledWindowWidget newdsw = (DPSScrolledWindowWidget) new; + Bool inited; + +#define NE(field) newdsw->sw.field != olddsw->sw.field +#define DONT_CHANGE(field) \ + if (NE(field)) newdsw->sw.field = olddsw->sw.field; + + DONT_CHANGE(ctm_ptr); + DONT_CHANGE(inv_ctm_ptr); + DONT_CHANGE(backing_pixmap); + DONT_CHANGE(feedback_pixmap); + DONT_CHANGE(window_gstate); + DONT_CHANGE(backing_gstate); + DONT_CHANGE(feedback_gstate); + + if (NE(context)) { + DSWSetupCallbackRec setup; + + if (newdsw->sw.context == NULL) { + newdsw->sw.context = XDPSGetSharedContext(XtDisplay(newdsw)); + } + if (_XDPSTestComponentInitialized(newdsw->sw.context, + dps_init_bit_dsw, &inited) == + dps_status_unregistered_context) { + XDPSRegisterContext(newdsw->sw.context, False); + } + if (XtIsRealized(newdsw)) { + setup.context = newdsw->sw.context; + XtCallCallbackList((Widget) newdsw, newdsw->sw.setup_callback, + (XtPointer) &setup); + } + UpdateGStates(newdsw); + } + + /* Watch progress only works with pass-through event dispatching */ + + if (NE(watch_progress)) { + if (newdsw->sw.watch_progress && + XDPSSetEventDelivery(XtDisplay(newdsw), dps_event_query) != + dps_event_pass_through) newdsw->sw.watch_progress = False; + } + + if (NE(application_scrolling) && !newdsw->sw.application_scrolling) { + XtVaSetValues(newdsw->sw.h_scroll, XmNmaximum, newdsw->sw.scroll_h_max, + XmNvalue, newdsw->sw.scroll_h_value, + XmNsliderSize, newdsw->sw.scroll_h_size, NULL); + XtVaSetValues(newdsw->sw.v_scroll, XmNmaximum, newdsw->sw.scroll_v_max, + XmNvalue, newdsw->sw.scroll_v_value, + XmNsliderSize, newdsw->sw.scroll_v_size, NULL); + } + + if (newdsw->sw.doing_feedback) { + DONT_CHANGE(scale); + DONT_CHANGE(area_width); + DONT_CHANGE(area_height); + } + + if (NE(pixmap_limit) || NE(absolute_pixmap_limit)) CheckPixmapSize(newdsw); + + if (NE(area_width) || NE(area_height) || NE(scale)) ResizeArea(newdsw); + + /* It's too confusing to let any of these things change in the middle + of drawing */ + + if (NE(use_backing_pixmap) || NE(watch_progress) || + NE(minimal_drawing) || NE(document_size_pixmaps)) { + Boolean freeIt = False, setUp = False; + AbortOrFinish(newdsw); + if (NE(use_backing_pixmap)) { + if (newdsw->sw.use_backing_pixmap) setUp = True; + else freeIt = True; + } + if (NE(document_size_pixmaps)) { + if (newdsw->sw.backing_pixmap != None) freeIt = True; + setUp = True; + } + if (freeIt) FreeBackingPixmap(newdsw); + if (setUp) SetUpInitialPixmap(newdsw); + } + + if (NE(dirty_areas)) { + float *r = newdsw->sw.dirty_areas; + int n = newdsw->sw.num_dirty_areas; + DONT_CHANGE(dirty_areas); + DONT_CHANGE(num_dirty_areas); + AbortOrFinish(newdsw); + AddRectsToDirtyArea(newdsw, r, n); + if (newdsw->sw.watch_progress || newdsw->sw.backing_pixmap == None) { + ClearDirtyAreas(newdsw); + newdsw->sw.drawing_stage = DSWStart; + } else { + AddUserSpaceRectsToPending(newdsw, r, n); + StartDrawing(newdsw); + } + } + + if (NE(use_feedback_pixmap)) HandleFeedbackPixmapChange(newdsw); + + return False; +#undef DONT_CHANGE +} + +static XtGeometryResult GeometryManager( + Widget w, + XtWidgetGeometry *desired, XtWidgetGeometry *allowed) +{ + /* Pass geometry requests up to our parent */ + return XtMakeGeometryRequest(XtParent(w), desired, allowed); +} + +static XtGeometryResult QueryGeometry( + Widget w, + XtWidgetGeometry *desired, XtWidgetGeometry *allowed) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + + /* Pass geometry requests down to our child */ + return XtQueryGeometry(dsw->sw.scrolled_window, desired, allowed); +} + +static void CopyToFeedbackPixmap( + DPSScrolledWindowWidget dsw, + float *rects, + int n) +{ + int llx, lly, urx, ury; + int dx, dy; + int i; + float *r; + + ComputeOffsets(dsw, &dx, &dy); + + for (i = 0; i < n; i++) { + r = rects + (i * 4); + ConvertToX(dsw, LEFT(r), BOTTOM(r), &llx, &lly); + ConvertToX(dsw, RIGHT(r), TOP(r), &urx, &ury); + + XCopyArea(XtDisplay(dsw), dsw->sw.backing_pixmap, + dsw->sw.feedback_pixmap, dsw->sw.no_ge_gc, + llx+dx-1, ury+dy-1, urx-llx+2, lly-ury+2, llx-1, ury-1); + } +} + +static void CallFeedbackCallback( + DPSScrolledWindowWidget dsw, + float *r, + int n) +{ + DSWFeedbackCallbackRec f; + + f.start_feedback_data = dsw->sw.start_feedback_data; + f.continue_feedback_data = dsw->sw.continue_feedback_data; + if (dsw->sw.feedback_pixmap == None) { + f.type = DSWWindow; + f.drawable = XtWindow(dsw->sw.drawing_area); + f.gstate = dsw->sw.window_gstate; + } else { + f.type = DSWFeedbackPixmap; + f.drawable = dsw->sw.feedback_pixmap; + f.gstate = dsw->sw.feedback_gstate; + } + f.context = dsw->sw.context; + f.dirty_rects = r; + f.dirty_count = n; + + XDPSSetContextGState(dsw->sw.context, f.gstate); + _DPSSWSetRectViewClip(dsw->sw.context, r, n * 4); + XtCallCallbackList((Widget) dsw, dsw->sw.feedback_callback, + (XtPointer) &f); + DPSWaitContext(dsw->sw.context); +} + +static void SetScale( + Widget w, + double scale, + long fixedX, long fixedY) +{ + float psX, psY; + + ConvertToPS((DPSScrolledWindowWidget) w, (float) fixedX, (float) fixedY, + &psX, &psY); + SetScaleAndScroll(w, scale, psX, psY, fixedX, fixedY); +} + +void DSWSetScale( + Widget w, + double scale, + long fixedX, long fixedY) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.set_scale) (w, scale, fixedX, fixedY); +} + +static void ScrollPoint( + Widget w, + double psX, double psY, + long xX, long xY) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + + if (!XtIsRealized(w)) { + dsw->sw.use_saved_scroll = True; + dsw->sw.scroll_pic_x = psX; + dsw->sw.scroll_pic_y = psY; + dsw->sw.scroll_win_x = xX; + dsw->sw.scroll_win_y = xY; + return; + } else { + SetDrawingAreaPosition(dsw, psX, psY, xX, xY, False); + ScrollMoved(dsw); + } +} + +void DSWScrollPoint( + Widget w, + double psX, double psY, + long xX, long xY) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.scroll_point) (w, psX, psY, xX, xY); +} + +static void ScrollBy(Widget w, long dx, long dy) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + int value; + + if (dx == 0 && dy == 0) return; + + if (!XtIsRealized(w) && dsw->sw.use_saved_scroll) { + dsw->sw.scroll_win_x += dx; + dsw->sw.scroll_win_y += dy; + } else { + value = dsw->sw.scroll_h_value + dx; + + if (value < 0) value = 0; + else if (value > dsw->sw.scroll_h_max - dsw->sw.scroll_h_size) { + value = dsw->sw.scroll_h_max - dsw->sw.scroll_h_size; + } + dsw->sw.scroll_h_value = value; + + if (!dsw->sw.application_scrolling) { + XtVaSetValues(dsw->sw.h_scroll, XmNvalue, value, NULL); + } + + value = dsw->sw.scroll_v_value + dy; + + if (value < 0) value = 0; + else if (value > dsw->sw.scroll_v_max - dsw->sw.scroll_v_size) { + value = dsw->sw.scroll_v_max - dsw->sw.scroll_v_size; + } + dsw->sw.scroll_v_value = value; + + if (!dsw->sw.application_scrolling) { + XtVaSetValues(dsw->sw.v_scroll, XmNvalue, value, NULL); + } + + ScrollMoved(dsw); + } +} + +void DSWScrollBy(Widget w, long dx, long dy) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.scroll_by) (w, dx, dy); +} + +static void ScrollTo(Widget w, long x, long y) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + int max, size; + + if (XtIsRealized(w)) { + if (x < 0) x = 0; + else if (x > dsw->sw.scroll_h_max - dsw->sw.scroll_h_size) { + x = dsw->sw.scroll_h_max - dsw->sw.scroll_h_size; + } + dsw->sw.scroll_h_value = x; + + if (y < 0) y = 0; + else if (y > dsw->sw.scroll_v_max - dsw->sw.scroll_v_size) { + y = dsw->sw.scroll_v_max - dsw->sw.scroll_v_size; + } + dsw->sw.scroll_v_value = y; + + if (!dsw->sw.application_scrolling) { + XtVaSetValues(dsw->sw.h_scroll, XmNvalue, x, NULL); + XtVaSetValues(dsw->sw.v_scroll, XmNvalue, y, NULL); + } + + ScrollMoved(dsw); + } +} + +void DSWScrollTo(Widget w, long x, long y) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.scroll_to) (w, x, y); +} + +static void SetScaleAndScroll( + Widget w, + double scale, + double psX, double psY, + long xX, long xY) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + Arg arg; + union { + int i; + float f; + } kludge; + + dsw->sw.use_saved_scroll = True; + dsw->sw.scroll_pic_x = psX; + dsw->sw.scroll_pic_y = psY; + dsw->sw.scroll_win_x = xX; + dsw->sw.scroll_win_y = xY; + + kludge.f = scale; + arg.name = XtNscale; + if (sizeof(float) > sizeof(XtArgVal)) arg.value = (XtArgVal) &kludge.f; + else arg.value = (XtArgVal) kludge.i; + XtSetValues(w, &arg, 1); +} + +void DSWSetScaleAndScroll( + Widget w, + double scale, + double psX, double psY, + long xX, long xY) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.set_scale_and_scroll) (w, scale, psX, psY, xX, xY); +} + +static void ConvertXToPS( + Widget w, + long xX, long xY, + float *psX, float *psY) +{ + ConvertToPS((DPSScrolledWindowWidget) w, (float) xX, (float) xY, psX, psY); +} + +void DSWConvertXToPS( + Widget w, + long xX, long xY, + float *psX, float *psY) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.convert_x_to_ps) (w, xX, xY, psX, psY); +} + +static void ConvertPSToX( + Widget w, + double psX, double psY, + int *xX, int *xY) +{ + ConvertToX((DPSScrolledWindowWidget) w, psX, psY, xX, xY); +} + +void DSWConvertPSToX( + Widget w, + double psX, double psY, + int *xX, int *xY) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.convert_ps_to_x) (w, psX, psY, xX, xY); +} + +static void AddToDirtyArea( + Widget w, + float *rect, + long n) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + + if (n == 1 && rect[0] == 0 && rect[1] == 0 && + rect[2] == -1 && rect[2] == -1) { + rect[2] = dsw->sw.area_width; + rect[3] = dsw->sw.area_height; + } + + XtVaSetValues(w, XtNdirtyAreas, rect, XtNnumDirtyAreas, n, NULL); +} + +void DSWAddToDirtyArea( + Widget w, + float *rect, + long n) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.add_to_dirty_area) (w, rect, n); +} + +static Boolean TakeFeedbackPixmap( + Widget w, + Pixmap *p, + int *width, int *height, int *depth, + Screen **screen) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + + if (dsw->sw.doing_feedback) return False; + + *p = dsw->sw.feedback_pixmap; + if (*p == None) { + *width = *height = *depth; + *screen = NULL; + return True; + } + + *width = dsw->sw.feedback_width; + *height = dsw->sw.feedback_height; + *depth = dsw->sw.drawing_area->core.depth; + *screen = dsw->core.screen; + + dsw->sw.feedback_pixmap = None; + dsw->sw.feedback_width = dsw->sw.feedback_height = 0; + return True; +} + +Boolean DSWTakeFeedbackPixmap( + Widget w, + Pixmap *p, + int *width, int *height, int *depth, + Screen **screen) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + return (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.take_feedback_pixmap) (w, p, width, height, + depth, screen); +} + +static void StartFeedbackDrawing( + Widget w, + XtPointer start_feedback_data) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + float *r; + + FinishDrawing(dsw); + CheckFeedbackPixmap(dsw); + if (dsw->sw.feedback_pixmap != None) { + /* Initialize the feedback pixmap with a copy of the drawing */ + GrowRectList(&dsw->sw.prev_dirty_areas, &dsw->sw.prev_dirty_areas_size, + 0, 1, 1); + r = dsw->sw.prev_dirty_areas; + ConvertToPS(dsw, 0 + DELTA, dsw->sw.drawing_area->core.height - DELTA, + r, r+1); + ConvertToPS(dsw, dsw->sw.drawing_area->core.width - DELTA, 0 + DELTA, + r+2, r+3); + r[2] -= r[0]; + r[3] -= r[1]; + dsw->sw.num_prev_dirty_areas = 1; + + if (dsw->sw.backing_pixmap != None) { + CopyToFeedbackPixmap(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + } else { + CopyRectsToCurrentDrawing(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + (void) ClipAndDraw(dsw, DSWFeedbackPixmap, DSWFinish, True); + } + } + dsw->sw.num_prev_dirty_areas = 0; + dsw->sw.doing_feedback = True; + dsw->sw.start_feedback_data = start_feedback_data; +} + +void DSWStartFeedbackDrawing( + Widget w, + XtPointer start_feedback_data) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.start_feedback_drawing) (w, start_feedback_data); +} + +static void EndFeedbackDrawing( + Widget w, + int restore) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + + if (restore) { + if (dsw->sw.backing_pixmap != None) { + UpdateWindowFromBackingPixmap(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + } else { + CopyRectsToCurrentDrawing(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + (void) ClipAndDraw(dsw, DSWWindow, DSWFinish, True); + } + } + if (dsw->sw.feedback_gstate != 0) { + XDPSFreeContextGState(dsw->sw.context, dsw->sw.feedback_gstate); + } + dsw->sw.doing_feedback = dsw->sw.feedback_displayed = False; +} + +void DSWEndFeedbackDrawing( + Widget w, + Bool restore) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.end_feedback_drawing) (w, restore); +} + +static void SetFeedbackDirtyArea( + Widget w, + float *rects, + int count, + XtPointer continue_feedback_data) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + int i; + float *r; + + for (i = 0; i < count; i++) { + r = rects + (i * 4); + if (WIDTH(r) < 0) { + LEFT(r) += WIDTH(r); + WIDTH(r) = -WIDTH(r); + } + if (HEIGHT(r) < 0) { + BOTTOM(r) += HEIGHT(r); + HEIGHT(r) = -HEIGHT(r); + } + } + + if (dsw->sw.backing_pixmap != None) { + if (dsw->sw.feedback_pixmap != None) { + CopyToFeedbackPixmap(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + } else { + UpdateWindowFromBackingPixmap(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + } + } else { + CopyRectsToCurrentDrawing(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + (void) ClipAndDraw(dsw, (dsw->sw.feedback_pixmap == None ? + DSWWindow : DSWFeedbackPixmap), + DSWFinish, True); + } + dsw->sw.continue_feedback_data = continue_feedback_data; + CallFeedbackCallback(dsw, rects, count); + + if (dsw->sw.feedback_pixmap != None) { + CopyRectsToDirtyArea(dsw, dsw->sw.prev_dirty_areas, + dsw->sw.num_prev_dirty_areas); + AddRectsToDirtyArea(dsw, rects, count); + SimplifyRects(dsw->sw.dirty_areas, &dsw->sw.num_dirty_areas); + UpdateWindowFromFeedbackPixmap(dsw, dsw->sw.dirty_areas, + dsw->sw.num_dirty_areas); + dsw->sw.num_dirty_areas = 0; + } + CopyRectsToPrevDirtyArea(dsw, rects, count); + dsw->sw.feedback_displayed = True; +} + +void DSWSetFeedbackDirtyArea( + Widget w, + float *rects, + int count, + XtPointer continue_feedback_data) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.set_feedback_dirty_area) (w, rects, count, + continue_feedback_data); +} + +static void FinishPendingDrawing(Widget w) +{ + FinishDrawing((DPSScrolledWindowWidget) w); +} + +void DSWFinishPendingDrawing(Widget w) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.finish_pending_drawing) (w); +} + +static void AbortPendingDrawing(Widget w) +{ + AbortDrawing((DPSScrolledWindowWidget) w); +} + +void DSWAbortPendingDrawing(Widget w) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.abort_pending_drawing) (w); +} + +static void UpdateDrawing( + Widget w, + float *rects, + int count) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + int i; + float *r; + int llx, lly, urx, ury; + int dx, dy; + + if (dsw->sw.backing_pixmap == None) { + AddToDirtyArea(w, rects, count); + return; + } + + ComputeOffsets(dsw, &dx, &dy); + + for (i = 0; i < count; i++) { + r = rects + (i * 4); + ConvertToX(dsw, LEFT(r), BOTTOM(r), &llx, &lly); + ConvertToX(dsw, RIGHT(r), TOP(r), &urx, &ury); + XCopyArea(XtDisplay(dsw), XtWindow(dsw->sw.drawing_area), + dsw->sw.backing_pixmap, dsw->sw.no_ge_gc, + llx-1, ury-1, urx-llx+2, lly-ury+2, llx+dx-1, ury+dy-1); + } +} + +void DSWUpdateDrawing( + Widget w, + float *rects, + int count) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.update_drawing) (w, rects, count); +} + +static void GetScrollInfo( + Widget w, + int *h_value, int *h_size, int *h_max, int *v_value, int *v_size, int *v_max) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + + if (h_value != NULL) *h_value = dsw->sw.scroll_h_value; + if (h_size != NULL) *h_size = dsw->sw.scroll_h_size; + if (h_max != NULL) *h_max = dsw->sw.scroll_h_max; + if (v_value != NULL) *v_value = dsw->sw.scroll_v_value; + if (v_size != NULL) *v_size = dsw->sw.scroll_v_size; + if (v_max != NULL) *v_max = dsw->sw.scroll_v_max; +} + +void DSWGetScrollInfo( + Widget w, + int *h_value, int *h_size, int *h_max, int *v_value, int *v_size, int *v_max) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.get_scroll_info) (w, h_value, h_size, h_max, + v_value, v_size, v_max); +} + +static void GetDrawingInfo( + Widget w, + DSWDrawableType *type, + Drawable *drawable, + DPSGState *gstate, + DPSContext *context) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + + if (dsw->sw.backing_pixmap != None) { + *type = DSWBackingPixmap; + *drawable = dsw->sw.backing_pixmap; + *gstate = dsw->sw.backing_gstate; + } else { + *type = DSWWindow; + *drawable = XtWindow(dsw->sw.drawing_area); + *gstate = dsw->sw.window_gstate; + } + *context = dsw->sw.context; +} + +void DSWGetDrawingInfo( + Widget w, + DSWDrawableType *type, + Drawable *drawable, + DPSGState *gstate, + DPSContext *context) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.get_drawing_info) (w, type, drawable, gstate, context); +} + +static Boolean GiveFeedbackPixmap( + Widget w, + Pixmap p, + int width, int height, int depth, + Screen *screen) +{ + DPSScrolledWindowWidget dsw = (DPSScrolledWindowWidget) w; + + if ((unsigned) depth != dsw->sw.drawing_area->core.depth + || screen != dsw->core.screen + || dsw->sw.feedback_pixmap != None) return False; + + dsw->sw.feedback_pixmap = p; + dsw->sw.feedback_width = width; + dsw->sw.feedback_height = height; + + return True; +} + +Boolean DSWGiveFeedbackPixmap( + Widget w, + Pixmap p, + int width, int height, int depth, + Screen *screen) +{ + XtCheckSubclass(w, dpsScrolledWindowWidgetClass, NULL); + + return (*((DPSScrolledWindowWidgetClass) XtClass(w))-> + sw_class.give_feedback_pixmap) (w, p, width, height, + depth, screen); +} + +static void ConvertToX( + DPSScrolledWindowWidget dsw, + float psX, + float psY, + int *xX, + int *xY) +{ + *xX = dsw->sw.ctm[0] * psX + dsw->sw.ctm[2] * psY + dsw->sw.ctm[4] + + dsw->sw.x_offset + 0.5; + *xY = dsw->sw.ctm[1] * psX + dsw->sw.ctm[3] * psY + dsw->sw.ctm[5] + + dsw->sw.y_offset + 0.5; +} + +static void ConvertToPS( + DPSScrolledWindowWidget dsw, + float xX, float xY, + float *psX, float *psY) +{ + xX -= dsw->sw.x_offset; + xY -= dsw->sw.y_offset; + + *psX = dsw->sw.inv_ctm[0] * xX + dsw->sw.inv_ctm[2] * xY + + dsw->sw.inv_ctm[4]; + *psY = dsw->sw.inv_ctm[1] * xX + dsw->sw.inv_ctm[3] * xY + + dsw->sw.inv_ctm[5]; +} + +static void ConvertToOrigPS( + DPSScrolledWindowWidget dsw, + int xX, int xY, + float *psX, float *psY) +{ + xX -= dsw->sw.x_offset; + xY -= dsw->sw.y_offset; + + *psX = dsw->sw.orig_inv_ctm[0] * xX + dsw->sw.orig_inv_ctm[2] * xY + + dsw->sw.orig_inv_ctm[4]; + *psY = dsw->sw.orig_inv_ctm[1] * xX + dsw->sw.orig_inv_ctm[3] * xY + + dsw->sw.orig_inv_ctm[5]; +} |