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Diffstat (limited to 'libXaw/src/AsciiSink.c')
| -rw-r--r-- | libXaw/src/AsciiSink.c | 1951 |
1 files changed, 1951 insertions, 0 deletions
diff --git a/libXaw/src/AsciiSink.c b/libXaw/src/AsciiSink.c new file mode 100644 index 000000000..ad35a127c --- /dev/null +++ b/libXaw/src/AsciiSink.c @@ -0,0 +1,1951 @@ +/* $Xorg: AsciiSink.c,v 1.4 2001/02/09 02:03:42 xorgcvs Exp $ */ + +/*********************************************************** + +Copyright 1987, 1988, 1994, 1998 The Open Group + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of The Open Group shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from The Open Group. + + +Copyright 1987, 1988 by Digital Equipment Corporation, Maynard, Massachusetts. + + All Rights Reserved + +Permission to use, copy, modify, and distribute this software and its +documentation for any purpose and without fee is hereby granted, +provided that the above copyright notice appear in all copies and that +both that copyright notice and this permission notice appear in +supporting documentation, and that the name of Digital not be +used in advertising or publicity pertaining to distribution of the +software without specific, written prior permission. + +DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING +ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL +DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR +ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, +WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, +ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS +SOFTWARE. + +******************************************************************/ +/* $XFree86: xc/lib/Xaw/AsciiSink.c,v 1.26 2001/12/14 19:54:38 dawes Exp $ */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include <stdio.h> +#include <stdlib.h> +#include <X11/IntrinsicP.h> +#include <X11/StringDefs.h> +#include <X11/Xatom.h> +#include <X11/Xaw/XawInit.h> +#include <X11/Xaw/AsciiSinkP.h> +#include <X11/Xaw/AsciiSrcP.h> +#include <X11/Xaw/TextP.h> +#include "Private.h" + +#ifdef GETLASTPOS +#undef GETLASTPOS /* We will use our own GETLASTPOS */ +#endif + +#define GETLASTPOS \ + XawTextSourceScan(source, 0, XawstAll, XawsdRight, 1, True) + +/* + * Class Methods + */ +static void XawAsciiSinkClassPartInitialize(WidgetClass); +static void XawAsciiSinkInitialize(Widget, Widget, ArgList, Cardinal*); +static void XawAsciiSinkDestroy(Widget); +static void XawAsciiSinkResize(Widget); +static Boolean XawAsciiSinkSetValues(Widget, Widget, Widget, + ArgList, Cardinal*); +static int MaxLines(Widget, unsigned int); +static int MaxHeight(Widget, int); +static void SetTabs(Widget, int, short*); +static void DisplayText(Widget, int, int, + XawTextPosition, XawTextPosition, Bool); +static void InsertCursor(Widget, int, int, XawTextInsertState); +static void FindPosition(Widget, XawTextPosition, int, int, Bool, + XawTextPosition*, int*, int*); +static void FindDistance(Widget, XawTextPosition, int, XawTextPosition, int*, + XawTextPosition*, int*); +static void Resolve(Widget, XawTextPosition, int, int, XawTextPosition*); +static void GetCursorBounds(Widget, XRectangle*); +#ifndef OLDXAW +static void AsciiPreparePaint(Widget, int, int, + XawTextPosition, XawTextPosition, Bool); +static void AsciiDoPaint(Widget); +#endif + +/* + * Prototypes + */ +static void GetGC(AsciiSinkObject); +static int CharWidth(AsciiSinkObject, XFontStruct*, int, unsigned int); +static unsigned int PaintText(Widget w, GC gc, int x, int y, + char *buf, int len, Bool); + +/* + * Defined in TextSink.c + */ +void _XawTextSinkClearToBackground(Widget, int, int, unsigned, unsigned); + +/* + * Initialization + */ +#define offset(field) XtOffsetOf(AsciiSinkRec, ascii_sink.field) +static XtResource resources[] = { + { + XtNfont, + XtCFont, + XtRFontStruct, + sizeof(XFontStruct*), + offset(font), + XtRString, + XtDefaultFont + }, + { + XtNecho, + XtCOutput, + XtRBoolean, + sizeof(Boolean), + offset(echo), + XtRImmediate, + (XtPointer)True + }, + { + XtNdisplayNonprinting, + XtCOutput, + XtRBoolean, + sizeof(Boolean), + offset(display_nonprinting), + XtRImmediate, + (XtPointer) + True + }, +}; +#undef offset + +#define Superclass (&textSinkClassRec) +AsciiSinkClassRec asciiSinkClassRec = { + /* object */ + { + (WidgetClass)Superclass, /* superclass */ + "AsciiSink", /* class_name */ + sizeof(AsciiSinkRec), /* widget_size */ + XawInitializeWidgetSet, /* class_initialize */ + XawAsciiSinkClassPartInitialize, /* class_part_initialize */ + False, /* class_inited */ + XawAsciiSinkInitialize, /* initialize */ + NULL, /* initialize_hook */ + NULL, /* obj1 */ + NULL, /* obj2 */ + 0, /* obj3 */ + resources, /* resources */ + XtNumber(resources), /* num_resources */ + NULLQUARK, /* xrm_class */ + False, /* obj4 */ + False, /* obj5 */ + False, /* obj6 */ + False, /* obj7 */ + XawAsciiSinkDestroy, /* destroy */ + (XtProc)XawAsciiSinkResize, /* obj8 */ + NULL, /* obj9 */ + XawAsciiSinkSetValues, /* set_values */ + NULL, /* set_values_hook */ + NULL, /* obj10 */ + NULL, /* get_values_hook */ + NULL, /* obj11 */ + XtVersion, /* version */ + NULL, /* callback_private */ + NULL, /* obj12 */ + NULL, /* obj13 */ + NULL, /* obj14 */ + NULL, /* extension */ + }, + /* text_sink */ + { + DisplayText, /* DisplayText */ + InsertCursor, /* InsertCursor */ + XtInheritClearToBackground, /* ClearToBackground */ + FindPosition, /* FindPosition */ + FindDistance, /* FindDistance */ + Resolve, /* Resolve */ + MaxLines, /* MaxLines */ + MaxHeight, /* MaxHeight */ + SetTabs, /* SetTabs */ + GetCursorBounds, /* GetCursorBounds */ +#ifndef OLDXAW + NULL /* extension */ +#endif + }, + /* ascii_sink */ + { + NULL, /* extension */ + } +}; + +WidgetClass asciiSinkObjectClass = (WidgetClass)&asciiSinkClassRec; + +/* + * Implementation + */ +static void +XawAsciiSinkClassPartInitialize(WidgetClass wc) +{ +#ifndef OLDXAW + AsciiSinkObjectClass cclass = (AsciiSinkObjectClass)wc; + XrmQuark record_type = XrmPermStringToQuark("TextSink"); + TextSinkExt ext = cclass->text_sink_class.extension; + + while (ext) { + if (ext->record_type == record_type && + ext->version == 1) { + ext->PreparePaint = AsciiPreparePaint; + ext->DoPaint = AsciiDoPaint; + break; + } + ext = (TextSinkExt)ext->next_extension; + } + if (ext == NULL) + XtError("TextSinkClass: cannot resolve extension.\n"); +#endif +} + +static int +CharWidth(AsciiSinkObject sink, XFontStruct *font, int x, unsigned int c) +{ + int width = 0; + + if (c == XawLF) + return (0); + + if (c == XawTAB) { + int i; + Position *tab; + + width = x; + /* Adjust for Left Margin */ + x -= ((TextWidget)XtParent((Widget)sink))->text.left_margin; + + i = 0; + tab = sink->text_sink.tabs; + /*CONSTCOND*/ + while (1) { + if (x >= 0 && x < *tab) + return (*tab - x); + /* Start again */ + if (++i >= sink->text_sink.tab_count) { + x -= *tab; + i = 0; + tab = sink->text_sink.tabs; + if (width == x) + return (0); + } + else + ++tab; + } + /*NOTREACHED*/ + } + + if ((c & 0177) < XawSP || c == 0177) { + if (sink->ascii_sink.display_nonprinting) { + if (c > 0177) { + width = CharWidth(sink, font, x, '\\'); + width += CharWidth(sink, font, x, ((c >> 6) & 7) + '0'); + width += CharWidth(sink, font, x, ((c >> 3) & 7) + '0'); + c = (c & 7) + '0'; + } + else { + width = CharWidth(sink, font, x, '^'); + if ((c |= 0100) == 0177) + c = '?'; + } + } + else + c = XawSP; + } + + if (font->per_char + && (c >= font->min_char_or_byte2 && c <= font->max_char_or_byte2)) + width += font->per_char[c - font->min_char_or_byte2].width; + else + width += font->min_bounds.width; + + return (width); +} + +#ifndef OLDXAW +static int +GetTextWidth(TextWidget ctx, int current_width, XFontStruct *font, + XawTextPosition from, int length) +{ + int i, width = 0; + XawTextBlock block; + XawTextPosition pos = from; + + while (length > 0) { + pos = XawTextSourceRead(ctx->text.source, from, &block, length); + length -= pos - from; + from = pos; + for (i = 0; i < block.length; i++) + width += CharWidth((AsciiSinkObject)ctx->text.sink, font, + current_width + width, + (unsigned char)block.ptr[i]); + } + + return (width); +} + +static +void CalculateBearing(TextWidget ctx, XawTextPosition position, int x, int y, + int ascent, int descent, Bool highlight, Bool right) +{ +/* + * Sample case: + * + * lbearing| width |rbearing + * | | + * | #### + * | ### | + * | #### | + * | #### | + * | ########## | + * | #### | + * | #### | + * | #### | + * | #### | + * |### | + * #### | + * | | + * + */ + AsciiSinkObject sink = (AsciiSinkObject)ctx->text.sink; + XawTextAnchor *anchor; + XawTextEntity *entity; + XawTextProperty *property; + XawTextPaintStruct *paint; + XawTextBlock block; + XFontStruct *font; + + property = NULL; + if (XawTextSourceAnchorAndEntity(ctx->text.source, position, + &anchor, &entity) && + (property = XawTextSinkGetProperty((Widget)sink, + entity->property)) != NULL && + (property->mask & XAW_TPROP_FONT)) + font = property->font; + else + font = sink->ascii_sink.font; + if (right) { + if (font->max_bounds.rbearing > 0) { + int rbearing = font->max_bounds.rbearing - font->max_bounds.width; + unsigned char c; + + (void)XawTextSourceRead(ctx->text.source, position, &block, 1); + c = *(unsigned char*)block.ptr; + if (c == '\t' || c == '\n') + c = ' '; + else if ((c & 0177) < XawSP || c == 0177) { + if (sink->ascii_sink.display_nonprinting) + c = c > 0177 ? (c & 7) + '0' : c + '@'; + else + c = ' '; + } + if (font->per_char && + (c >= font->min_char_or_byte2 && c <= font->max_char_or_byte2)) + rbearing = font->per_char[c - font->min_char_or_byte2].rbearing - + font->per_char[c - font->min_char_or_byte2].width; + if (rbearing > 0) { + paint = XtNew(XawTextPaintStruct); + paint->next = sink->text_sink.paint->bearings; + sink->text_sink.paint->bearings = paint; + paint->x = x - (paint->width = CharWidth(sink, font, 0, c)); + paint->y = y + ascent; + paint->property = property; + paint->max_ascent = ascent; + paint->max_descent = descent; + paint->backtabs = NULL; + paint->highlight = highlight; + paint->length = 1; + paint->text = XtMalloc(1); + paint->text[0] = c; + } + } + } + else { + if (font->min_bounds.lbearing < 0) { + int lbearing = font->min_bounds.lbearing; + unsigned char c; + + (void)XawTextSourceRead(ctx->text.source, position, &block, 1); + c = *(unsigned char*)block.ptr; + if (c == '\t' || c == '\n') + c = ' '; + else if ((c & 0177) < XawSP || c == 0177) { + if (sink->ascii_sink.display_nonprinting) + c = c > 0177 ? '\\' : c + '^'; + else + c = ' '; + } + if (font->per_char && + (c >= font->min_char_or_byte2 && c <= font->max_char_or_byte2)) + lbearing = font->per_char[c - font->min_char_or_byte2].lbearing; + if (lbearing < 0) { + paint = XtNew(XawTextPaintStruct); + paint->next = sink->text_sink.paint->bearings; + sink->text_sink.paint->bearings = paint; + paint->x = x; + paint->width = -CharWidth(sink, font, 0, c); + paint->y = y + ascent; + paint->property = property; + paint->max_ascent = ascent; + paint->max_descent = descent; + paint->backtabs = NULL; + paint->highlight = highlight; + paint->length = 1; + paint->text = XtMalloc(1); + paint->text[0] = c; + } + } + } +} + +static void +AsciiPreparePaint(Widget w, int y, int line, + XawTextPosition from, XawTextPosition to, Bool highlight) +{ + static XmuSegment segment; + static XmuScanline next; + static XmuScanline scanline = {0, &segment, &next}; + static XmuArea area = {&scanline}; + + TextWidget ctx = (TextWidget)XtParent(w); + AsciiSinkObject sink = (AsciiSinkObject)ctx->text.sink; + XawTextPosition left, right, pos, pos2, tmp, length; + XawTextAnchor *anchor; + XawTextEntity *entity; + XawTextProperty *property; + int i, ascent = 0, descent = 0, xl, xr, x = ctx->text.left_margin, bufsiz; + XawTextBlock block; + XFontStruct *font; + XawTextPaintStruct *paint; + + if (!sink->ascii_sink.echo) + return; + + /* pass 1: calculate ascent/descent values and x coordinate */ + /* XXX the MAX ascent/descent value should be in the line table XXX */ + /* XXX the x coordinate can be a parameter, but since it is required + to calculate the ascent/descent, do it here to avoid an extra + search in the entities */ + pos = tmp = left = ctx->text.lt.info[line].position; + right = ctx->text.lt.info[line + 1].position; + right = XawMin(right, ctx->text.lastPos + 1); + while (pos < right) { + if (XawTextSourceAnchorAndEntity(ctx->text.source, pos, + &anchor, &entity)) { + if ((property = XawTextSinkGetProperty((Widget)sink, + entity->property)) != NULL && + (property->mask & XAW_TPROP_FONT)) + font = property->font; + else + font = sink->ascii_sink.font; + tmp = pos; + pos = anchor->position + entity->offset + entity->length; + if ((length = XawMin(from, pos) - tmp) > 0) + x += GetTextWidth(ctx, x, font, tmp, length); + ascent = XawMax(font->ascent, ascent); + descent = XawMax(font->descent, descent); + } + else if (anchor) { + ascent = XawMax(sink->ascii_sink.font->ascent, ascent); + descent = XawMax(sink->ascii_sink.font->descent, descent); + while (entity && pos < right) { + tmp = pos; + if ((pos = anchor->position + entity->offset) < tmp) + pos = tmp; + else { + if ((length = XawMin(from, pos) - tmp) > 0) { + x += GetTextWidth(ctx, x, sink->ascii_sink.font, tmp, + length); + tmp += length; + } + if (pos < right) { + pos += entity->length; + if ((property = XawTextSinkGetProperty((Widget)sink, + entity->property)) != NULL && + (property->mask & XAW_TPROP_FONT)) + font = property->font; + else + font = sink->ascii_sink.font; + if ((length = XawMin(from, pos) - tmp) > 0) + x += GetTextWidth(ctx, x, font, tmp, length); + ascent = XawMax(font->ascent, ascent); + descent = XawMax(font->descent, descent); + } + } + entity = entity->next; + } + + if (anchor->entities == NULL) { + tmp = XawMin(pos, from); + if ((length = from - tmp) > 0) + x += GetTextWidth(ctx, x, sink->ascii_sink.font, tmp, length); + break; + } + } + else { + tmp = XawMin(pos, from); + if ((length = from - tmp) > 0) + x += GetTextWidth(ctx, x, sink->ascii_sink.font, tmp, length); + ascent = XawMax(sink->ascii_sink.font->ascent, ascent); + descent = XawMax(sink->ascii_sink.font->descent, descent); + break; + } + } + if (!ascent) + ascent = sink->ascii_sink.font->ascent; + if (!descent) + descent = sink->ascii_sink.font->descent; + + xl = x; + + /* pass 2: feed the XawTextPaintStruct lists */ + pos = from; + while (pos < to) { + paint = XtNew(XawTextPaintStruct); + paint->next = sink->text_sink.paint->paint; + sink->text_sink.paint->paint = paint; + paint->x = x; + paint->y = y + ascent; + paint->property = NULL; + paint->max_ascent = ascent; + paint->max_descent = descent; + paint->backtabs = NULL; + paint->highlight = highlight; + + tmp = pos; + if (XawTextSourceAnchorAndEntity(ctx->text.source, pos, + &anchor, &entity)) { + pos = anchor->position + entity->offset + entity->length; + if ((paint->property = XawTextSinkGetProperty((Widget)sink, + entity->property)) != NULL && + (paint->property->mask & XAW_TPROP_FONT)) + font = paint->property->font; + else + font = sink->ascii_sink.font; + } + else { + if (anchor) { + while (entity && anchor->position + entity->offset < pos) + entity = entity->next; + if (entity) + pos = anchor->position + entity->offset; + else + pos = to; + } + else + pos = to; + font = sink->ascii_sink.font; + } + pos = XawMin(pos, to); + length = pos - tmp; + + paint->text = XtMalloc(bufsiz = pos - tmp + 4); + paint->length = 0; + segment.x1 = x; + + pos2 = tmp; + while (length > 0) { + pos2 = XawTextSourceRead(ctx->text.source, tmp, &block, length); + length = pos - pos2; + tmp = pos2; + for (i = 0; i < block.length; i++) { + unsigned char c = (unsigned char)block.ptr[i]; + + if (paint->length + 4 > bufsiz) + paint->text = XtRealloc(paint->text, bufsiz += 32); + paint->text[paint->length] = c; + if (c == '\n') { + x += CharWidth(sink, font, 0, ' '); + continue; + } + if (c == '\t') { + x += XTextWidth(font, paint->text, paint->length); + segment.x2 = x + CharWidth(sink, font, x, '\t'); + + if (XmuValidSegment(&segment)) { + if (!highlight && (paint->property && + (paint->property->mask & XAW_TPROP_BACKGROUND))) { + if (ascent > font->ascent) { + scanline.y = y; + next.y = y + ascent - font->ascent; + XmuAreaOr(sink->text_sink.paint->clip, &area); + } + if (descent >= font->descent) { + scanline.y = y + ascent + font->descent; + next.y = scanline.y + descent - font->descent + 1; + XmuAreaOr(sink->text_sink.paint->clip, &area); + } + if (paint->backtabs == NULL) + paint->backtabs = XmuCreateArea(); + scanline.y = y + ascent - font->ascent; + next.y = y + ascent + font->descent; + XmuAreaOr(paint->backtabs, &area); + } + else { + scanline.y = y; + next.y = ctx->text.lt.info[line + 1].y; + if (highlight) { + if (!sink->text_sink.paint->hightabs) + sink->text_sink.paint->hightabs = + XmuCreateArea(); + XmuAreaOr(sink->text_sink.paint->hightabs, &area); + } + else + XmuAreaOr(sink->text_sink.paint->clip, &area); + } + } + + paint->width = segment.x2 - segment.x1; + x = segment.x1 = segment.x2; + + if (paint->length == 0) { + paint->x = x; + continue; + } + paint->text = XtRealloc(paint->text, paint->length); + property = paint->property; + paint = XtNew(XawTextPaintStruct); + paint->next = sink->text_sink.paint->paint; + sink->text_sink.paint->paint = paint; + paint->x = x; + paint->y = y + ascent; + paint->property = property; + paint->max_ascent = ascent; + paint->max_descent = descent; + paint->backtabs = NULL; + paint->highlight = highlight; + paint->text = XtMalloc(bufsiz = pos - tmp - length + + block.length - i + 4); + paint->length = 0; + continue; + } + if ((c & 0177) < XawSP || c == 0177) { + if (sink->ascii_sink.display_nonprinting) { + if (c > 0177) { + paint->text[paint->length++] = '\\'; + paint->text[paint->length++] = ((c >> 6) & 7) + '0'; + paint->text[paint->length++] = ((c >> 3) & 7) + '0'; + paint->text[paint->length] = (c & 7) + '0'; + } + else { + c |= 0100; + paint->text[paint->length++] = '^'; + paint->text[paint->length] = c == 0177 ? '?' : c; + } + } + else + paint->text[paint->length] = ' '; + } + paint->length++; + } + } + + x += XTextWidth(font, paint->text, paint->length); + segment.x2 = x; + if (XmuValidSegment(&segment)) { + /* erase only what really is needed */ + /*if (!highlight || (paint->property && + (paint->property->mask & XAW_TPROP_BACKGROUND))) { + if (ascent > font->ascent) { + scanline.y = y; + next.y = y + ascent - font->ascent; + XmuAreaOr(sink->text_sink.paint->clip, &area); + } + if (descent > font->descent) { + scanline.y = y + ascent + font->descent; + next.y = scanline.y + descent - font->descent; + XmuAreaOr(sink->text_sink.paint->clip, &area); + } + } + else*/ { + scanline.y = y; + next.y = ctx->text.lt.info[line + 1].y; + XmuAreaOr(sink->text_sink.paint->clip, &area); + } + } + + paint->width = x - segment.x1; + } + + xr = x; + + /* pass 3: bearing clipping */ + if (left < from) { + CalculateBearing(ctx, from - 1, xl, y, ascent, descent, highlight, True); + if (ctx->text.s.left < ctx->text.s.right) { + if (ctx->text.s.right == from) + CalculateBearing(ctx, from, xl, y, ascent, descent, True, False); + else if (ctx->text.s.left == from) + CalculateBearing(ctx, from, xl, y, ascent, descent, False, False); + } + } + right = XawMin(right, ctx->text.lastPos); + if (right >= to && to > from) { + if (to < right) + CalculateBearing(ctx, to, xr, y, ascent, descent, highlight, False); + if (ctx->text.s.left < ctx->text.s.right) { + if (ctx->text.s.right == to) + CalculateBearing(ctx, to - 1, xr, y, ascent, descent, False, True); + else if (ctx->text.s.left == to) + CalculateBearing(ctx, to - 1, xr, y, ascent, descent, True, True); + } + } +} + +static int +qcmp_paint_struct(_Xconst void *left, _Xconst void *right) +{ + return ((*(XawTextPaintStruct**)left)->property - + (*(XawTextPaintStruct**)right)->property); +} + +static void +AsciiDoPaint(Widget w) +{ + TextWidget ctx = (TextWidget)XtParent(w); + AsciiSinkObject sink = (AsciiSinkObject)ctx->text.sink; + XmuScanline *scan; + XmuSegment *seg; + XawTextPaintList *list = sink->text_sink.paint; +#if 0 + XawTextPaintStruct *base, *head; +#endif + XawTextPaintStruct *paint = list->paint; + XawTextProperty *property; + XFontStruct *font = NULL; + XRectangle *rects; + int n_rects, i_rects; + GC gc; + Bool highlight; + XRectangle rect; + int width, height, line_width = -1; + XGCValues values; + + /* pass 1: clear clipping areas */ + /* XXX Don't use XDrawImageString because the font may be italic, and + will get incorrectly drawn. Probably, it could be a good idea to + check if this is the case, and do special processing. But this + will need to be checked if required. */ + for (scan = list->clip->scanline; scan && scan->next; scan = scan->next) + for (seg = scan->segment; seg; seg = seg->next) + _XawTextSinkClearToBackground(ctx->text.sink, + seg->x1, scan->y, + seg->x2 - seg->x1, + scan->next->y - scan->y); + + /* pass 2: optimize drawing list to avoid too much GC change requests */ + /* XXX this assumes there will not exist entities drawn over other + entities. */ +#if 0 + while (paint) { + base = paint; + head = paint->next; + while (head) { + if (head->property == paint->property) { + base->next = head->next; + head->next = paint->next; + paint->next = head; + paint = head; + } + base = head; + head = head->next; + } + paint = paint->next; + } +#endif + if (paint && paint->next) { + XawTextPaintStruct **paints; + int i = 0, n_paints = 0; + + while (paint) { + paint = paint->next; + ++n_paints; + } + paints = (XawTextPaintStruct**) + XtMalloc(n_paints * sizeof(XawTextPaintStruct)); + paint = list->paint; + while (paint) { + paints[i++] = paint; + paint = paint->next; + } + qsort((void*)paints, n_paints, sizeof(XawTextPaintStruct*), + qcmp_paint_struct); + list->paint = paints[0]; + for (i = 0; i < n_paints - 1; i++) + paints[i]->next = paints[i + 1]; + paints[i]->next = NULL; + XtFree((XtPointer)paints); + } + + /* pass 3: clip gc */ + gc = sink->ascii_sink.normgc; + + rect.x = ctx->text.r_margin.left; + rect.y = ctx->text.r_margin.top; + width = (int)XtWidth(ctx) - RHMargins(ctx); + height = (int)XtHeight(ctx) - RVMargins(ctx); + rect.width = width; + rect.height = height; + if (width >= 0 && height >= 0) + XSetClipRectangles(XtDisplay((Widget)ctx), gc, + 0, 0, &rect, 1, Unsorted); + else + XSetClipMask(XtDisplay((Widget)ctx), gc, None); + + /* pass 4: draw backgrounds */ + paint = list->paint; + property = NULL; + rects = NULL; + i_rects = n_rects = 0; + while (paint) { + if (paint->property && (paint->property->mask & XAW_TPROP_BACKGROUND)) { + if (property != paint->property) { + if (i_rects) + XFillRectangles(XtDisplay(ctx), XtWindow(ctx), gc, + rects, i_rects); + i_rects = 0; + property = paint->property; + if (property->mask & XAW_TPROP_FONT) + font = property->font; + else + font = sink->ascii_sink.font; + XSetForeground(XtDisplay(ctx), gc, property->background); + } + if (i_rects <= n_rects) + rects = (XRectangle*) + XtRealloc((XtPointer)rects, sizeof(XRectangle) * + ++n_rects); + rects[i_rects].x = paint->x; + rects[i_rects].y = paint->y - font->ascent; + rects[i_rects].width = paint->width; + rects[i_rects++].height = font->ascent + font->descent; + + if (paint->backtabs) { + for (scan = paint->backtabs->scanline; scan && scan->next; + scan = scan->next) + for (seg = scan->segment; seg; seg = seg->next) { + if (i_rects <= n_rects) + rects = (XRectangle*) + XtRealloc((XtPointer)rects, sizeof(XRectangle) * + ++n_rects); + rects[i_rects].x = seg->x1; + rects[i_rects].y = scan->y; + rects[i_rects].width = seg->x2 - seg->x1; + rects[i_rects++].height = scan->next->y - scan->y; + } + } + + + } + paint = paint->next; + } + if (i_rects) + XFillRectangles(XtDisplay(ctx), XtWindow(ctx), gc, rects, i_rects); + + paint = list->paint; + i_rects = 0; + while (paint) { + if (paint->highlight) { + if (i_rects == 0) + XSetForeground(XtDisplay(ctx), gc, sink->text_sink.cursor_color); + if (i_rects <= n_rects) + rects = (XRectangle*) + XtRealloc((XtPointer)rects, sizeof(XRectangle) * + ++n_rects); + rects[i_rects].x = paint->x; + rects[i_rects].y = paint->y - paint->max_ascent; + rects[i_rects].width = paint->width; + rects[i_rects++].height = paint->max_ascent + paint->max_descent + 1; + } + paint = paint->next; + } + if (list->hightabs) { + for (scan = list->hightabs->scanline; scan && scan->next; + scan = scan->next) + for (seg = scan->segment; seg; seg = seg->next) { + if (i_rects == 0) + XSetForeground(XtDisplay(ctx), gc, + sink->text_sink.cursor_color); + if (i_rects <= n_rects) + rects = (XRectangle*) + XtRealloc((XtPointer)rects, sizeof(XRectangle) * + ++n_rects); + rects[i_rects].x = seg->x1; + rects[i_rects].y = scan->y; + rects[i_rects].width = seg->x2 - seg->x1; + rects[i_rects++].height = scan->next->y - scan->y; + } + } + + if (i_rects) + XFillRectangles(XtDisplay(ctx), XtWindow(ctx), gc, rects, i_rects); + if (rects) + XtFree((XtPointer)rects); + + /* pass 5: draw text! */ + paint = list->paint; + if (paint && (property = paint->property) == NULL) { + font = sink->ascii_sink.font; + XSetFont(XtDisplay(ctx), gc, font->fid); + if (!paint->highlight) + XSetForeground(XtDisplay(ctx), gc, sink->text_sink.foreground); + } + else + property = NULL; + highlight = False; + while (paint) { + if (!highlight && paint->highlight) + XSetForeground(XtDisplay(ctx), gc, sink->text_sink.background); + if (highlight || paint->highlight || paint->property != property) { + if (!paint->property || !(paint->property->mask & XAW_TPROP_FONT)) + font = sink->ascii_sink.font; + else + font = paint->property->font; + XSetFont(XtDisplay(ctx), gc, font->fid); + if (!paint->highlight) { + if (!paint->property || + !(paint->property->mask & XAW_TPROP_FOREGROUND)) + XSetForeground(XtDisplay(ctx), gc, + sink->text_sink.foreground); + else + XSetForeground(XtDisplay(ctx), gc, + paint->property->foreground); + } + highlight = paint->highlight; + property = paint->property; + } + + if (paint->x < XtWidth(ctx) && paint->x + paint->width > 0) { + XDrawString(XtDisplay(ctx), XtWindow(ctx), gc, paint->x, paint->y, + paint->text, paint->length); + if (property) { + if (property->mask & XAW_TPROP_UNDERLINE) { + if (line_width != property->underline_thickness) { + values.line_width = line_width = + property->underline_thickness; + XChangeGC(XtDisplay(ctx), gc, GCLineWidth, &values); + } + + XDrawLine(XtDisplay(ctx), XtWindow(ctx), gc, paint->x, + paint->y + property->underline_position, + paint->x + paint->width, + paint->y + property->underline_position); + } + if (property->mask & XAW_TPROP_OVERSTRIKE) { + if (line_width != property->underline_thickness) { + values.line_width = line_width = + property->underline_thickness; + XChangeGC(XtDisplay(ctx), gc, GCLineWidth, &values); + } + + XDrawLine(XtDisplay(ctx), XtWindow(ctx), gc, paint->x, + paint->y - (font->ascent>>1) + (font->descent>>1), + paint->x + paint->width, + paint->y - (font->ascent>>1) + (font->descent>>1)); + } + } + } + + paint = paint->next; + } + + /* pass 6: bearing clipping */ + /* dont care on order of drawing or caching of state (by now) */ + paint = list->bearings; + while (paint) { + XRectangle rect; + + if (paint->highlight) + XSetForeground(XtDisplay(ctx), gc, sink->text_sink.background); + if (!paint->property || !(paint->property->mask & XAW_TPROP_FONT)) + font = sink->ascii_sink.font; + else + font = paint->property->font; + XSetFont(XtDisplay(ctx), gc, font->fid); + if (!paint->highlight) { + if (!paint->property || + !(paint->property->mask & XAW_TPROP_FOREGROUND)) + XSetForeground(XtDisplay(ctx), gc, sink->text_sink.foreground); + else + XSetForeground(XtDisplay(ctx), gc, paint->property->foreground); + } + if (paint->x < XtWidth(ctx) && paint->x + paint->width > 0) { + rect.x = paint->x + paint->width; + rect.width = XawAbs(paint->width); /* more than enough */ + rect.y = paint->y - font->ascent; + rect.height = rect.y + font->ascent + font->descent; + XSetClipRectangles(XtDisplay((Widget)ctx), gc, + 0, 0, &rect, 1, Unsorted); + XDrawString(XtDisplay(ctx), XtWindow(ctx), gc, paint->x, paint->y, + paint->text, paint->length); + } + paint = paint->next; + } +} +#endif + +/* + * Function: + * PaintText + * + * Parameters: + * w - text sink object + * gc - gc to paint text with + * x - location to paint the text + * y - "" + * buf - buffer and length of text to paint. + * len - "" + * clear_bg - clear background before drawing ? + * + * Description: + * Actually paints the text into the window. + * + * Returns: + * the width of the text painted + */ +static unsigned int +PaintText(Widget w, GC gc, int x, int y, char *buf, int len, Bool clear_bg) +{ + AsciiSinkObject sink = (AsciiSinkObject)w; + TextWidget ctx = (TextWidget)XtParent(w); + int width = XTextWidth(sink->ascii_sink.font, buf, len); + + if ((x > XtWidth(ctx)) || width <= -x) /* Don't draw if we can't see it */ + return (width); + + if (clear_bg) { + _XawTextSinkClearToBackground(w, x, y - sink->ascii_sink.font->ascent, + width, sink->ascii_sink.font->ascent + + sink->ascii_sink.font->descent); + XDrawString(XtDisplay(ctx), XtWindow(ctx), gc, x, y, buf, len); + } + else + XDrawImageString(XtDisplay(ctx), XtWindow(ctx), gc, x, y, buf, len); + + return (width); +} + +static void +DisplayText(Widget w, int x, int y, + XawTextPosition pos1, XawTextPosition pos2, Bool highlight) +{ + TextWidget ctx = (TextWidget)XtParent(w); + AsciiSinkObject sink = (AsciiSinkObject)w; + XFontStruct *font = sink->ascii_sink.font; + Widget source = XawTextGetSource(XtParent(w)); + unsigned char buf[260]; + int j, k; + XawTextBlock blk; + GC gc, invgc, tabgc; + int max_x; + Bool clear_bg; + + if (!sink->ascii_sink.echo || !ctx->text.lt.lines) + return; + + max_x = (int)XtWidth(ctx) - ctx->text.r_margin.right; + clear_bg = !highlight && ctx->core.background_pixmap != XtUnspecifiedPixmap; + + gc = highlight ? sink->ascii_sink.invgc : sink->ascii_sink.normgc; + invgc = highlight ? sink->ascii_sink.normgc : sink->ascii_sink.invgc; + + if (highlight && sink->ascii_sink.xorgc) + tabgc = sink->ascii_sink.xorgc; + else + tabgc = invgc; + + y += sink->ascii_sink.font->ascent; + for (j = 0; pos1 < pos2;) { + pos1 = XawTextSourceRead(source, pos1, &blk, pos2 - pos1); + for (k = 0; k < blk.length; k++) { + if (j >= sizeof(buf) - 4) { /* buffer full, dump the text */ + if ((x += PaintText(w, gc, x, y, (char*)buf, j, clear_bg)) + >= max_x) + return; + j = 0; + } + buf[j] = blk.ptr[k]; + if (buf[j] == XawLF) /* line feeds ('\n') are not printed */ + continue; + + else if (buf[j] == '\t') { + int width; + + if (j != 0 + && (x += PaintText(w, gc, x, y, (char*)buf, j, clear_bg)) + >= max_x) + return; + + if ((width = CharWidth(sink, font, x, '\t')) > -x) { + if (clear_bg) + _XawTextSinkClearToBackground(w, x, y-font->ascent, width, + font->ascent+font->descent); + else + XFillRectangle(XtDisplayOfObject(w), XtWindowOfObject(w), + tabgc, x, y - font->ascent, width, + font->ascent + font->descent); + } + + if ((x += width) >= max_x) + return; + + j = -1; + } + else if ((buf[j] & 0177) < XawSP || buf[j] == 0177) { + if (sink->ascii_sink.display_nonprinting) { + unsigned char c = buf[j]; + + if (c > 0177) { + buf[j++] = '\\'; + buf[j++] = ((c >> 6) & 7) + '0'; + buf[j++] = ((c >> 3) & 7) + '0'; + buf[j] = (c & 7) + '0'; + } + else { + c |= 0100; + buf[j++] = '^'; + buf[j] = c == 0177 ? '?' : c; + } + } + else + buf[j] = ' '; + } + j++; + } + } + + if (j > 0) + (void)PaintText(w, gc, x, y, (char*)buf, j, clear_bg); +} + +/* + * Function: + * GetCursorBounds + * + * Parameters: + * w - text sink object + * rect - X rectangle to return the cursor bounds + * + * Description: + * Returns the size and location of the cursor. + */ +static void +GetCursorBounds(Widget w, XRectangle *rect) +{ + AsciiSinkObject sink = (AsciiSinkObject)w; + XFontStruct *font = sink->ascii_sink.font; + unsigned char ch; +#ifndef OLDXAW + TextWidget ctx = (TextWidget)XtParent(w); + XawTextBlock block; + XawTextAnchor *anchor; + XawTextEntity *entity; + XawTextProperty *property; + + if (XawTextSourceAnchorAndEntity(XawTextGetSource(XtParent(w)), + sink->ascii_sink.cursor_position, + &anchor, &entity)) { + if ((property = XawTextSinkGetProperty((Widget)sink, + entity->property)) != NULL && + (property->mask & XAW_TPROP_FONT)) + font = property->font; + } + (void)XawTextSourceRead(XawTextGetSource((Widget)ctx), + ctx->text.insertPos, &block, 1); + if (!block.length || block.ptr[0] == '\n' || block.ptr[0] == '\t') + ch = ' '; + else if ((*((unsigned char*)block.ptr) & 0177) < XawSP || + *(unsigned char*)block.ptr == 0177) { + if (sink->ascii_sink.display_nonprinting) + ch = *((unsigned char*)block.ptr) > 0177 ? '\\' : '^'; + else + ch = ' '; + } + else + ch = *(unsigned char*)block.ptr; +#else + ch = ' '; +#endif + + rect->width = CharWidth(sink, font, 0, ch); + rect->height = font->descent + font->ascent + 1; + + rect->x = sink->ascii_sink.cursor_x; + rect->y = sink->ascii_sink.cursor_y - font->ascent; +} + +/* this function is required to support diferent fonts and correctly place + * the cursor. There are better ways to calculate the base line, but there is + * no place/code (yet) to store this information. + */ +static int +FindCursorY(TextWidget ctx, XawTextPosition position) +{ + int y, line, ascent; + AsciiSinkObject sink = (AsciiSinkObject)ctx->text.sink; +#ifndef OLDXAW + XawTextAnchor *anchor; + XawTextEntity *entity; + XawTextProperty *property; + XawTextPosition left, right; +#endif + + for (line = 0; line < ctx->text.lt.lines; line++) + if (position < ctx->text.lt.info[line + 1].position) + break; + + y = ctx->text.lt.info[line].y; +#ifndef OLDXAW + ascent = 0; + left = ctx->text.lt.info[line].position; + right = ctx->text.lt.info[line + 1].position; + right = XawMin(right, ctx->text.lastPos + 1); + while (left < right) { + if (XawTextSourceAnchorAndEntity(ctx->text.source, left, + &anchor, &entity)) { + if ((property = XawTextSinkGetProperty((Widget)sink, + entity->property)) != NULL && + (property->mask & XAW_TPROP_FONT)) + ascent = XawMax(property->font->ascent, ascent); + else + ascent = XawMax(sink->ascii_sink.font->ascent, ascent); + left = anchor->position + entity->offset + entity->length; + } + else if (anchor) { + ascent = XawMax(sink->ascii_sink.font->ascent, ascent); + while (entity) { + XawTextPosition tmp = anchor->position + entity->offset + entity->length; + + if (tmp > left && tmp < right) { + left = tmp; + if ((property = XawTextSinkGetProperty((Widget)sink, + entity->property)) != NULL && + (property->mask & XAW_TPROP_FONT)) + ascent = XawMax(property->font->ascent, ascent); + else + ascent = XawMax(sink->ascii_sink.font->ascent, ascent); + } + entity = entity->next; + } + if (entity == NULL) + break; + } + else { + ascent = XawMax(sink->ascii_sink.font->ascent, ascent); + break; + } + } + if (!ascent) + ascent = sink->ascii_sink.font->ascent; +#else + ascent = sink->ascii_sink.font->ascent; +#endif + + return (y + ascent); +} + +static void +InsertCursor(Widget w, int x, int y, XawTextInsertState state) +{ + AsciiSinkObject sink = (AsciiSinkObject)w; + XFontStruct *font = sink->ascii_sink.font; + TextWidget ctx = (TextWidget)XtParent(w); + XawTextPosition position = XawTextGetInsertionPoint((Widget)ctx); + Boolean overflow = (x & 0xffff8000) != 0; +#ifndef OLDXAW + XawTextAnchor *anchor; + XawTextEntity *entity; + XawTextProperty *property; +#endif + + if (XtIsRealized((Widget)ctx)) { + int fheight; + XawTextBlock block; + XawTextPosition selection_start, selection_end; + Boolean has_selection; + + if (!sink->ascii_sink.echo) { + if (sink->ascii_sink.laststate != state) { + int width = CharWidth(sink, font, 0, ' ') - 1; + + x = ctx->text.margin.left; + y = ctx->text.margin.top; + font = sink->ascii_sink.font; + fheight = font->ascent + font->descent; + if (state == XawisOn) { + if (ctx->text.hasfocus) + XFillRectangle(XtDisplay(ctx), XtWindow(ctx), + sink->ascii_sink.xorgc, x, y, + width + 1, fheight + 1); + else + XDrawRectangle(XtDisplay(ctx), XtWindow(ctx), + sink->ascii_sink.xorgc, x, y, + width, fheight); + + } + else + _XawTextSinkClearToBackground(w, x, y, + width + 1, fheight + 1); + } + sink->ascii_sink.cursor_x = x; + sink->ascii_sink.cursor_y = y; + sink->ascii_sink.laststate = state; + return; + } + + + XawTextGetSelectionPos((Widget)ctx, &selection_start, &selection_end); + has_selection = selection_start != selection_end; + + if (sink->ascii_sink.laststate != state) { + unsigned char ch; + +#ifndef OLDXAW + if (XawTextSourceAnchorAndEntity(ctx->text.source, + position, &anchor, &entity) && + (property = XawTextSinkGetProperty((Widget)sink, + entity->property)) != NULL && + (property->mask & XAW_TPROP_FONT)) + font = property->font; + else + font = sink->ascii_sink.font; +#endif + + fheight = font->ascent + font->descent; + (void)XawTextSourceRead(XawTextGetSource((Widget)ctx), + position, &block, 1); + if (!block.length || block.ptr[0] == '\n' || block.ptr[0] == '\t') + ch = ' '; + else if ((*((unsigned char*)block.ptr) & 0177) < XawSP + || *(unsigned char*)block.ptr == 0177) { + if (sink->ascii_sink.display_nonprinting) + ch = *((unsigned char*)block.ptr) > 0177 ? '\\' : '^'; + else + ch = ' '; + } + else + ch = *(unsigned char*)block.ptr; + + y = FindCursorY(ctx, position); + if (ctx->text.hasfocus && !has_selection) + XFillRectangle(XtDisplay(ctx), XtWindow(ctx), + sink->ascii_sink.xorgc, x, y - font->ascent, + CharWidth(sink, font, 0, ch), fheight + 1); + else + XDrawRectangle(XtDisplay(ctx), XtWindow(ctx), + sink->ascii_sink.xorgc, x, y - font->ascent, + CharWidth(sink, font, 0, ch) - 1, fheight); + } + } + + sink->ascii_sink.cursor_x = overflow ? -16384 : x; + sink->ascii_sink.cursor_y = y; + sink->ascii_sink.laststate = state; + sink->ascii_sink.cursor_position = position; +} + +/* + * Given two positions, find the distance between them + */ +static void +FindDistance(Widget w, XawTextPosition fromPos, int fromx, + XawTextPosition toPos, int *resWidth, + XawTextPosition *resPos, int *resHeight) +{ +#ifndef OLDXAW + AsciiSinkObject sink = (AsciiSinkObject)w; + TextWidget ctx = (TextWidget)XtParent(w); + XFontStruct *font = sink->ascii_sink.font; + Widget source = ctx->text.source; + XawTextPosition idx, pos; + unsigned char c; + XawTextBlock blk; + int i, rWidth, ascent = 0, descent = 0; + XawTextAnchor *anchor; + XawTextEntity *entity; + XawTextProperty *property; + Cardinal length; + Bool done = False; + + pos = idx = fromPos; + rWidth = 0; + c = 0; + + while (!done) { + if (XawTextSourceAnchorAndEntity(source, pos, &anchor, &entity)) { + length = anchor->position + entity->offset + entity->length; + length = XawMin(toPos, length) - pos; + if ((property = XawTextSinkGetProperty((Widget)sink, + entity->property)) != NULL && + (property->mask & XAW_TPROP_FONT)) + font = property->font; + else + font = sink->ascii_sink.font; + } + else { + if (anchor) { + while (entity && anchor->position + entity->offset < pos) + entity = entity->next; + if (entity) { + length = anchor->position + entity->offset; + length = XawMin(toPos, length) - pos; + } + else + length = XawMin(toPos - pos, 4096); + } + else + length = XawMin(toPos - pos, 4096); + font = sink->ascii_sink.font; + } + + ascent = XawMax(font->ascent, ascent); + descent = XawMax(font->descent, descent); + + pos = XawTextSourceRead(source, pos, &blk, length); + if (blk.length == 0 && pos == idx) /* eof reached */ + break; + + idx = blk.firstPos; + for (i = 0; idx < toPos; i++, idx++) { + if (i >= blk.length) + break; + c = blk.ptr[i]; + rWidth += CharWidth(sink, font, fromx + rWidth, c); + if (c == XawLF) { + idx++; + done = True; + break; + } + } + if (idx >= toPos) + break; + } + + *resPos = idx; + *resWidth = rWidth; + *resHeight = ascent + descent + 1; +#else + AsciiSinkObject sink = (AsciiSinkObject)w; + TextWidget ctx = (TextWidget)XtParent(w); + XFontStruct *font = sink->ascii_sink.font; + Widget source = ctx->text.source; + XawTextPosition idx, pos; + unsigned char c; + XawTextBlock blk; + int i, rWidth; + + pos = XawTextSourceRead(source, fromPos, &blk, toPos - fromPos); + rWidth = 0; + for (i = 0, idx = fromPos; idx < toPos; i++, idx++) { + if (i >= blk.length) { + i = 0; + pos = XawTextSourceRead(source, pos, &blk, toPos - pos); + if (blk.length == 0) + break; + } + c = blk.ptr[i]; + rWidth += CharWidth(sink, font, fromx + rWidth, c); + if (c == XawLF) { + idx++; + break; + } + } + + *resPos = idx; + *resWidth = rWidth; + *resHeight = font->ascent + font->descent + 1; +#endif +} + +static void +FindPosition(Widget w, XawTextPosition fromPos, int fromx, int width, + Bool stopAtWordBreak, XawTextPosition *resPos, + int *resWidth, int *resHeight) +{ +#ifndef OLDXAW + AsciiSinkObject sink = (AsciiSinkObject)w; + TextWidget ctx = (TextWidget)XtParent(w); + Widget source = ctx->text.source; + XFontStruct *font = sink->ascii_sink.font; + XawTextPosition idx, pos, whiteSpacePosition = 0; + int i, lastWidth, whiteSpaceWidth, rWidth, ascent = 0, descent = 0; + Boolean whiteSpaceSeen; + unsigned char c; + XawTextBlock blk; + XawTextAnchor *anchor; + XawTextEntity *entity; + XawTextProperty *property; + Cardinal length; + Bool done = False; + + pos = idx = fromPos; + rWidth = lastWidth = whiteSpaceWidth = 0; + whiteSpaceSeen = False; + c = 0; + + while (!done) { + font = sink->ascii_sink.font; + if (XawTextSourceAnchorAndEntity(source, pos, &anchor, &entity)) { + length = anchor->position + entity->offset + entity->length - pos; + if ((property = XawTextSinkGetProperty((Widget)sink, + entity->property)) != NULL && + (property->mask & XAW_TPROP_FONT)) + font = property->font; + } + else { + if (anchor) { + while (entity && anchor->position + entity->offset < pos) + entity = entity->next; + if (entity) + length = anchor->position + entity->offset - pos; + else + length = 4096; + } + else + length = 4096; + } + + ascent = XawMax(font->ascent, ascent); + descent = XawMax(font->descent, descent); + + pos = XawTextSourceRead(source, pos, &blk, length); + if (blk.length == 0 && pos == idx) /* eof reached */ + break; + + idx = blk.firstPos; + for (i = 0; rWidth <= width && i < blk.length; i++, idx++) { + c = blk.ptr[i]; + lastWidth = rWidth; + rWidth += CharWidth(sink, font, fromx + rWidth, c); + + if (c == XawLF) { + idx++; + done = True; + break; + } + else if ((c == XawSP || c == XawTAB) && rWidth <= width) { + whiteSpaceSeen = True; + whiteSpacePosition = idx; + whiteSpaceWidth = rWidth; + } + } + if (rWidth > width) + break; + } + + if (rWidth > width && idx > fromPos) { + idx--; + rWidth = lastWidth; + if (stopAtWordBreak && whiteSpaceSeen) { + idx = whiteSpacePosition + 1; + rWidth = whiteSpaceWidth; + } + } + + if (idx >= ctx->text.lastPos && c != XawLF) + idx = ctx->text.lastPos + 1; + + *resPos = idx; + *resWidth = rWidth; + *resHeight = ascent + descent + 1; +#else + AsciiSinkObject sink = (AsciiSinkObject)w; + TextWidget ctx = (TextWidget)XtParent(w); + Widget source = ctx->text.source; + XFontStruct *font = sink->ascii_sink.font; + XawTextPosition idx, pos, whiteSpacePosition = 0; + int i, lastWidth, whiteSpaceWidth, rWidth; + Boolean whiteSpaceSeen; + unsigned char c; + XawTextBlock blk; + + pos = XawTextSourceRead(source, fromPos, &blk, BUFSIZ); + rWidth = lastWidth = whiteSpaceWidth = 0; + whiteSpaceSeen = False; + c = 0; + + for (i = 0, idx = fromPos; rWidth <= width; i++, idx++) { + if (i >= blk.length) { + i = 0; + pos = XawTextSourceRead(source, pos, &blk, BUFSIZ); + if (blk.length == 0) + break; + } + c = blk.ptr[i]; + lastWidth = rWidth; + rWidth += CharWidth(sink, font, fromx + rWidth, c); + + if (c == XawLF) { + idx++; + break; + } + else if ((c == XawSP || c == XawTAB) && rWidth <= width) { + whiteSpaceSeen = True; + whiteSpacePosition = idx; + whiteSpaceWidth = rWidth; + } + } + + if (rWidth > width && idx > fromPos) { + idx--; + rWidth = lastWidth; + if (stopAtWordBreak && whiteSpaceSeen) { + idx = whiteSpacePosition + 1; + rWidth = whiteSpaceWidth; + } + } + + if (idx >= ctx->text.lastPos && c != XawLF) + idx = ctx->text.lastPos + 1; + + *resPos = idx; + *resWidth = rWidth; + *resHeight = font->ascent + font->descent + 1; +#endif +} + +static void +Resolve(Widget w, XawTextPosition pos, int fromx, int width, + XawTextPosition *pos_return) +{ + int resWidth, resHeight; + Widget source = XawTextGetSource(XtParent(w)); + + FindPosition(w, pos, fromx, width, False, pos_return, &resWidth, &resHeight); + if (*pos_return > GETLASTPOS) + *pos_return = GETLASTPOS; +} + +static void +GetGC(AsciiSinkObject sink) +{ + XtGCMask valuemask = (GCFont | GCGraphicsExposures | GCClipXOrigin | + GCForeground | GCBackground); + XGCValues values; + + /* XXX We dont want do share a gc that will change the clip-mask */ + values.clip_x_origin = (long)sink; + values.clip_mask = None; + values.font = sink->ascii_sink.font->fid; + values.graphics_exposures = False; + + values.foreground = sink->text_sink.foreground; + values.background = sink->text_sink.background; + sink->ascii_sink.normgc = XtAllocateGC((Widget)sink, 0, valuemask, &values, + GCClipMask | GCFont | GCForeground | + GCBackground, 0); + + values.foreground = sink->text_sink.background; +#ifndef OLDXAW + values.background = sink->text_sink.cursor_color; +#else + values.background = sink->text_sink.foreground; +#endif + sink->ascii_sink.invgc = XtAllocateGC((Widget)sink, 0, valuemask, &values, + GCClipMask | GCFont, 0); + + valuemask |= GCFunction; + values.function = GXxor; +#ifndef OLDXAW + values.foreground = sink->text_sink.background ^ sink->text_sink.cursor_color; +#else + values.foreground = sink->text_sink.background ^ sink->text_sink.foreground; +#endif + values.background = 0L; + sink->ascii_sink.xorgc = XtAllocateGC((Widget)sink, 0, valuemask, + &values, GCClipMask | GCFont, 0); + + XawAsciiSinkResize((Widget)sink); +} + +/* Function: + * XawAsciiSinkInitialize + * + * Parameters: + * request - the requested and new values for the object instance + * cnew - "" + * + * Description: + * Initializes the TextSink Object. + */ +/*ARGSUSED*/ +static void +XawAsciiSinkInitialize(Widget request, Widget cnew, + ArgList args, Cardinal *num_args) +{ + AsciiSinkObject sink = (AsciiSinkObject)cnew; + + GetGC(sink); + + if (!sink->ascii_sink.font) XtError("Aborting: no font found\n"); + + sink->ascii_sink.cursor_position = 0; + sink->ascii_sink.laststate = XawisOff; + sink->ascii_sink.cursor_x = sink->ascii_sink.cursor_y = 0; +} + +/* + * Function: + * XawAsciiSinkDestroy + * + * Parameters: + * w - AsciiSink Object + * + * Description: + * This function cleans up when the object is destroyed. + */ +static void +XawAsciiSinkDestroy(Widget w) +{ + AsciiSinkObject sink = (AsciiSinkObject)w; + + XtReleaseGC(w, sink->ascii_sink.normgc); + XtReleaseGC(w, sink->ascii_sink.invgc); + XtReleaseGC(w, sink->ascii_sink.xorgc); + + sink->ascii_sink.normgc = + sink->ascii_sink.invgc = + sink->ascii_sink.xorgc = NULL; +} + +static void +XawAsciiSinkResize(Widget w) +{ + TextWidget ctx = (TextWidget)XtParent(w); + AsciiSinkObject sink = (AsciiSinkObject)w; + XRectangle rect; + int width, height; + + if (w->core.widget_class != asciiSinkObjectClass) + return; + + rect.x = ctx->text.r_margin.left; + rect.y = ctx->text.r_margin.top; + width = (int)XtWidth(ctx) - RHMargins(ctx); + height = (int)XtHeight(ctx) - RVMargins(ctx); + rect.width = width; + rect.height = height; + + if (sink->ascii_sink.normgc) { + if (width >= 0 && height >= 0) + XSetClipRectangles(XtDisplay((Widget)ctx), sink->ascii_sink.normgc, + 0, 0, &rect, 1, Unsorted); + else + XSetClipMask(XtDisplay((Widget)ctx), sink->ascii_sink.normgc, None); + } + if (sink->ascii_sink.invgc) { + if (width >= 0 && height >= 0) + XSetClipRectangles(XtDisplay((Widget)ctx), sink->ascii_sink.invgc, + 0, 0, &rect, 1, Unsorted); + else + XSetClipMask(XtDisplay((Widget)ctx), sink->ascii_sink.invgc, None); + } + if (sink->ascii_sink.xorgc) { + if (width >= 0 && height >= 0) + XSetClipRectangles(XtDisplay((Widget)ctx), sink->ascii_sink.xorgc, + 0, 0, &rect, 1, Unsorted); + else + XSetClipMask(XtDisplay((Widget)ctx), sink->ascii_sink.xorgc, None); + } +} + +/* + * Function: + * XawAsciiSinkSetValues + * + * Parameters: + * current - current state of the object + * request - what was requested + * cnew - what the object will become + * + * Description: + * Sets the values for the AsciiSink. + * + * Returns: + * True if redisplay is needed + */ +/*ARGSUSED*/ +static Boolean +XawAsciiSinkSetValues(Widget current, Widget request, Widget cnew, + ArgList args, Cardinal *num_args) +{ + AsciiSinkObject w = (AsciiSinkObject)cnew; + AsciiSinkObject old_w = (AsciiSinkObject)current; + + if (w->ascii_sink.font != old_w->ascii_sink.font + || w->text_sink.background != old_w->text_sink.background + || w->text_sink.foreground != old_w->text_sink.foreground +#ifndef OLDXAW + || w->text_sink.cursor_color != old_w->text_sink.cursor_color + || w->text_sink.properties != old_w->text_sink.properties +#endif + ) { +#ifdef OLDXAW + XtReleaseGC(cnew, w->ascii_sink.normgc); + XtReleaseGC(cnew, w->ascii_sink.invgc); + XtReleaseGC(cnew, w->ascii_sink.xorgc); + GetGC(w); +#endif + ((TextWidget)XtParent(cnew))->text.redisplay_needed = True; + } + else if (w->ascii_sink.echo != old_w->ascii_sink.echo + || w->ascii_sink.display_nonprinting + != old_w->ascii_sink.display_nonprinting) + ((TextWidget)XtParent(cnew))->text.redisplay_needed = True; +#ifndef OLDXAW + if (w->text_sink.properties != old_w->text_sink.properties) { + XawTextProperty *property = + XawTextSinkGetProperty(cnew, XrmStringToQuark("default")); + + if (property) { + if (property->mask & XAW_TPROP_FONT) + w->ascii_sink.font = property->font; + if (property->mask & XAW_TPROP_FOREGROUND) + w->text_sink.foreground = property->foreground; + if (property->mask & XAW_TPROP_BACKGROUND) + w->text_sink.background = property->background; + } + } +#endif + + return (False); +} + +/* + * Function: + * MaxLines + * + * Parameters: + * w - AsciiSink Object + * height - height to fit lines into + * + * Description: + * Finds the Maximum number of lines that will fit in a given height. + * + * Returns: + * The number of lines that will fit + */ +/*ARGSUSED*/ +static int +MaxLines(Widget w, unsigned int height) +{ + AsciiSinkObject sink = (AsciiSinkObject)w; + int font_height; + + font_height = sink->ascii_sink.font->ascent + sink->ascii_sink.font->descent + 1; + + return ((int)height / font_height); +} + +/* + * Function: + * MaxHeight + * + * Parameters: + * w - AsciiSink Object + * lines - number of lines + * + * Description: + * Finds the Minium height that will contain a given number lines. + * + * Returns: + * the height + */ +static int +MaxHeight(Widget w, int lines) +{ + AsciiSinkObject sink = (AsciiSinkObject)w; + + return (lines * (sink->ascii_sink.font->ascent + + sink->ascii_sink.font->descent + 1)); +} + +/* + * Function: + * SetTabs + * + * Parameters: + * w - AsciiSink Object + * tab_count - number of tabs in the list + * tabs - text positions of the tabs + * + * Description: + * Sets the Tab stops. + */ +static void +SetTabs(Widget w, int tab_count, short *tabs) +{ + AsciiSinkObject sink = (AsciiSinkObject)w; + int i; + Atom XA_FIGURE_WIDTH; + unsigned long figure_width = 0; + XFontStruct *font = sink->ascii_sink.font; + + /* + * Find the figure width of the current font + */ + XA_FIGURE_WIDTH = XInternAtom(XtDisplayOfObject(w), "FIGURE_WIDTH", False); + if (XA_FIGURE_WIDTH != None + && (!XGetFontProperty(font, XA_FIGURE_WIDTH, &figure_width) + || figure_width == 0)) { + if (font->per_char && font->min_char_or_byte2 <= '$' + && font->max_char_or_byte2 >= '$') + figure_width = font->per_char['$' - font->min_char_or_byte2].width; + else + figure_width = font->max_bounds.width; + } + + if (tab_count > sink->text_sink.tab_count) { + sink->text_sink.tabs = (Position *) + XtRealloc((char*)sink->text_sink.tabs, tab_count * sizeof(Position)); + sink->text_sink.char_tabs = (short *) + XtRealloc((char*)sink->text_sink.char_tabs, tab_count * sizeof(short)); + } + + for (i = 0 ; i < tab_count ; i++) { + sink->text_sink.tabs[i] = tabs[i] * figure_width; + sink->text_sink.char_tabs[i] = tabs[i]; + } + + sink->text_sink.tab_count = tab_count; + +#ifndef NO_TAB_FIX + { + TextWidget ctx = (TextWidget)XtParent(w); + ctx->text.redisplay_needed = True; + _XawTextBuildLineTable(ctx, ctx->text.lt.top, True); + } +#endif +} |