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Diffstat (limited to 'libXaw/src/MultiSrc.c')
| -rw-r--r-- | libXaw/src/MultiSrc.c | 1620 |
1 files changed, 1620 insertions, 0 deletions
diff --git a/libXaw/src/MultiSrc.c b/libXaw/src/MultiSrc.c new file mode 100644 index 000000000..2daf0f6e8 --- /dev/null +++ b/libXaw/src/MultiSrc.c @@ -0,0 +1,1620 @@ +/* $Xorg: MultiSrc.c,v 1.4 2001/02/09 02:03:44 xorgcvs Exp $ */ + +/* + * Copyright 1991 by OMRON Corporation + * + * 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, and that the name OMRON not be used in + * advertising or publicity pertaining to distribution of the software without + * specific, written prior permission. OMRON makes no representations + * about the suitability of this software for any purpose. It is provided + * "as is" without express or implied warranty. + * + * OMRON DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, + * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO + * EVENT SHALL OMRON 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 + * TORTUOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + * + * Authors: Chris Peterson MIT X Consortium + * Li Yuhong OMRON Corporation + * Frank Sheeran OMRON Corporation + * + * Much code taken from X11R3 String and Disk Sources. + */ +/* $XFree86: xc/lib/Xaw/MultiSrc.c,v 1.28 2002/11/21 16:22:52 paulo Exp $ */ + +/* + +Copyright 1991, 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. + +*/ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif +#include <stdio.h> +#include <stdlib.h> +#include <ctype.h> +#include <errno.h> +#include <X11/IntrinsicP.h> +#include <X11/StringDefs.h> +#include <X11/Xfuncs.h> +#include <X11/Xos.h> +#include <X11/Xmu/CharSet.h> +#include <X11/Xmu/Misc.h> +#include <X11/Xaw/XawInit.h> +#include <X11/Xaw/MultiSrcP.h> +#include <X11/Xaw/XawImP.h> +#include "XawI18n.h" +#include "Private.h" + +#include <sys/types.h> +#include <sys/stat.h> +#include <fcntl.h> + +#define MAGIC_VALUE ((XawTextPosition)-1) +#define streq(a, b) (strcmp((a), (b)) == 0) + +#ifdef X_NOT_POSIX +#define Off_t long +#define Size_t unsigned int +#else +#define Off_t off_t +#define Size_t size_t +#endif + + +/* + * Class Methods + */ +static XawTextPosition ReadText(Widget, XawTextPosition, XawTextBlock*, int); +static int ReplaceText(Widget, XawTextPosition, XawTextPosition, + XawTextBlock*); +static XawTextPosition Scan(Widget, XawTextPosition, XawTextScanType, + XawTextScanDirection, int, Bool); +static XawTextPosition Search(Widget, XawTextPosition, XawTextScanDirection, + XawTextBlock*); +static void XawMultiSrcClassInitialize(void); +static void XawMultiSrcDestroy(Widget); +static void XawMultiSrcInitialize(Widget, Widget, ArgList, Cardinal*); +static Boolean XawMultiSrcSetValues(Widget, Widget, Widget, + ArgList, Cardinal*); +static void XawMultiSrcGetValuesHook(Widget, ArgList, Cardinal*); + +/* + * Prototypes + */ +static MultiPiece *AllocNewPiece(MultiSrcObject, MultiPiece*); +static void BreakPiece(MultiSrcObject, MultiPiece*); +static Boolean CvtMultiTypeToString(Display*, XrmValuePtr, Cardinal*, + XrmValuePtr, XrmValuePtr, XtPointer*); +static void CvtStringToMultiType(XrmValuePtr, Cardinal*, + XrmValuePtr, XrmValuePtr); +static MultiPiece *FindPiece(MultiSrcObject, XawTextPosition, + XawTextPosition*); +static void FreeAllPieces(MultiSrcObject); +static FILE *InitStringOrFile(MultiSrcObject, Bool); +static void LoadPieces(MultiSrcObject, FILE*, char*); +static void RemovePiece(MultiSrcObject, MultiPiece*); +static void RemoveOldStringOrFile(MultiSrcObject, Bool); +static String StorePiecesInString(MultiSrcObject); +static Bool WriteToFile(String, String); +static void GetDefaultPieceSize(Widget, int, XrmValue*); + +/* + * Initialization + */ +#define offset(field) XtOffsetOf(MultiSrcRec, multi_src.field) +static XtResource resources[] = { + { + XtNstring, + XtCString, + XtRString, + sizeof(XtPointer), + offset(string), + XtRPointer, + NULL + }, + { + XtNtype, + XtCType, + XtRMultiType, + sizeof(XawAsciiType), + offset(type), + XtRImmediate, + (XtPointer)XawAsciiString + }, + { + XtNdataCompression, + XtCDataCompression, + XtRBoolean, + sizeof(Boolean), + offset(data_compression), + XtRImmediate, + (XtPointer)False + }, + { + XtNpieceSize, + XtCPieceSize, + XtRInt, + sizeof(XawTextPosition), + offset(piece_size), + XtRCallProc, + (XtPointer)GetDefaultPieceSize + }, +#ifdef OLDXAW + { + XtNcallback, + XtCCallback, + XtRCallback, + sizeof(XtPointer), + offset(callback), + XtRCallback, + (XtPointer)NULL + }, +#endif + { + XtNuseStringInPlace, + XtCUseStringInPlace, + XtRBoolean, + sizeof(Boolean), + offset(use_string_in_place), + XtRImmediate, + (XtPointer)False + }, + { + XtNlength, + XtCLength, + XtRInt, + sizeof(int), + offset(multi_length), + XtRImmediate, + (XtPointer)MAGIC_VALUE + }, +}; +#undef offset + +#define superclass (&textSrcClassRec) +MultiSrcClassRec multiSrcClassRec = { + /* object */ + { + (WidgetClass)superclass, /* superclass */ + "MultiSrc", /* class_name */ + sizeof(MultiSrcRec), /* widget_size */ + XawMultiSrcClassInitialize, /* class_initialize */ + NULL, /* class_part_initialize */ + False, /* class_inited */ + XawMultiSrcInitialize, /* 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 */ + XawMultiSrcDestroy, /* destroy */ + NULL, /* obj8 */ + NULL, /* obj9 */ + XawMultiSrcSetValues, /* set_values */ + NULL, /* set_values_hook */ + NULL, /* obj10 */ + XawMultiSrcGetValuesHook, /* get_values_hook */ + NULL, /* obj11 */ + XtVersion, /* version */ + NULL, /* callback_private */ + NULL, /* obj12 */ + NULL, /* obj13 */ + NULL, /* obj14 */ + NULL, /* extension */ + }, + /* text_src */ + { + ReadText, /* Read */ + ReplaceText, /* Replace */ + Scan, /* Scan */ + Search, /* Search */ + XtInheritSetSelection, /* SetSelection */ + XtInheritConvertSelection, /* ConvertSelection */ + }, + /* multi_src */ + { + NULL, /* extension */ + }, +}; + +WidgetClass multiSrcObjectClass = (WidgetClass)&multiSrcClassRec; + +static XrmQuark Qstring, Qfile; + +/* + * Implementation + */ +static void +XawMultiSrcClassInitialize(void) +{ + XawInitializeWidgetSet(); + Qstring = XrmPermStringToQuark(XtEstring); + Qfile = XrmPermStringToQuark(XtEfile); + XtAddConverter(XtRString, XtRMultiType, CvtStringToMultiType, NULL, 0); + XtSetTypeConverter(XtRMultiType, XtRString, CvtMultiTypeToString, NULL, 0, + XtCacheNone, NULL); +} + +/* + * Function: + * XawMultiSrcInitialize + * + * Parameters: + * request - widget requested by the argument list + * cnew - the new widget with both resource and non resource values + * args - (unused) + * num_args - (unused) + * + * Description: + * Initializes the multi src object + */ +/*ARGSUSED*/ +static void +XawMultiSrcInitialize(Widget request, Widget cnew, + ArgList args, Cardinal *num_args) +{ + MultiSrcObject src = (MultiSrcObject)cnew; + FILE *file; + + /* + * Set correct flags (override resources) depending upon widget class + */ +#ifdef OLDXAW + src->multi_src.changes = False; +#else + src->text_src.changed = False; +#endif + src->multi_src.allocated_string = False; + + if (src->multi_src.use_string_in_place && src->multi_src.string == NULL) + src->multi_src.use_string_in_place = False; + + file = InitStringOrFile(src, src->multi_src.type == XawAsciiFile); + LoadPieces(src, file, NULL); + + if (file != NULL) + fclose(file); + src->text_src.text_format = XawFmtWide; +} + +/* + * Function: + * ReadText + * + * Parameters: + * w - MultiSource object + * pos - position of the text to retrieve + * text - text block that will contain returned text + * length - maximum number of characters to read + * + * Description: + * This function reads the source. + * + * Returns: + * The character position following the retrieved text. + */ +static XawTextPosition +ReadText(Widget w, XawTextPosition pos, XawTextBlock *text, int length) +{ + MultiSrcObject src = (MultiSrcObject)w; + XawTextPosition count, start; + MultiPiece *piece = FindPiece(src, pos, &start); + + text->format = XawFmtWide; + text->firstPos = pos; + text->ptr = (char *)(piece->text + (pos - start)); + count = piece->used - (pos - start); + text->length = Max(0, (length > count) ? count : length); + + return (pos + text->length); +} + +/* + * Function: + * ReplaceText + * + * Parameters: + * w - MultiSource object + * startPos - ends of text that will be removed + * endPos - "" + * text - new text to be inserted into buffer at startPos + * + * Description: + * Replaces a block of text with new text. + * + * Returns: + * XawEditDone on success, XawEditError otherwise + */ +/*ARGSUSED*/ +static int +ReplaceText(Widget w, XawTextPosition startPos, XawTextPosition endPos, + XawTextBlock *u_text_p) +{ + MultiSrcObject src = (MultiSrcObject)w; + MultiPiece *start_piece, *end_piece, *temp_piece; + XawTextPosition start_first, end_first; + int length, firstPos; + wchar_t *wptr; + Bool local_artificial_block = False; + XawTextBlock text; + + /* STEP 1: The user handed me a text block called `u_text' that may be + * in either FMTWIDE or FMT8BIT (ie MB.) Later code needs the block + * `text' to hold FMTWIDE. So, this copies `u_text' to `text', and if + * `u_text' was MB, I knock it up to WIDE + */ + if (u_text_p->length == 0) /* if so, the block contents never ref'd */ + text.length = 0; + + else if (u_text_p->format == XawFmtWide) { + local_artificial_block = False; /* don't have to free it ourselves */ + text.firstPos = u_text_p->firstPos; + text.length = u_text_p->length; + text.ptr = u_text_p->ptr; + } + else { + /* + * WARNING! u_text->firstPos and length are in units of CHAR, + * not CHARACTERS! + */ + local_artificial_block = True; /* have to free it ourselves */ + text.firstPos = 0; + text.length = u_text_p->length; /* _XawTextMBToWC converts this + * to wchar len + */ + + text.ptr = (char*)_XawTextMBToWC(XtDisplay(XtParent(w)), + &u_text_p->ptr[u_text_p->firstPos], + &text.length); + + /* I assert the following assignment is not needed - since Step 4 + depends on length, it has no need of a terminating NULL. I think + the ASCII-version has the same needless NULL. */ + /*((wchar_t*)text.ptr)[ text.length ] = NULL;*/ + } + + /* STEP 2: some initialization... */ + if (src->text_src.edit_mode == XawtextRead) + return (XawEditError); + + start_piece = FindPiece(src, startPos, &start_first); + end_piece = FindPiece(src, endPos, &end_first); + + /* STEP 3: remove the empty pieces... */ + if (start_piece != end_piece) { + temp_piece = start_piece->next; + + /* If empty and not the only piece then remove it */ + if (((start_piece->used = startPos - start_first) == 0) + && !(start_piece->next == NULL && start_piece->prev == NULL)) + RemovePiece(src, start_piece); + + while (temp_piece != end_piece) { + temp_piece = temp_piece->next; + RemovePiece(src, temp_piece->prev); + } + end_piece->used -= endPos - end_first; + if (end_piece->used != 0) + memmove(end_piece->text, end_piece->text + endPos - end_first, + end_piece->used * sizeof(wchar_t)); + } + else { /* We are fully in one piece */ + if ((start_piece->used -= endPos - startPos) == 0) { + if (!(start_piece->next == NULL && start_piece->prev == NULL)) + RemovePiece(src, start_piece); + } + else { + memmove(start_piece->text + (startPos - start_first), + start_piece->text + (endPos - start_first), + (start_piece->used - (startPos - start_first)) * + sizeof(wchar_t)); + if (src->multi_src.use_string_in_place && + ((src->multi_src.length - (endPos - startPos)) + < src->multi_src.piece_size - 1)) + start_piece->text[src->multi_src.length - (endPos - startPos)] = + (wchar_t)0; + } + } + + src->multi_src.length += text.length -(endPos - startPos); + + /* STEP 4: insert the new stuff */ + if ( text.length != 0) { + start_piece = FindPiece(src, startPos, &start_first); + length = text.length; + firstPos = text.firstPos; + + while (length > 0) { + wchar_t *ptr; + int fill; + + if (src->multi_src.use_string_in_place) { + if (start_piece->used == src->multi_src.piece_size - 1) { + + /* + * The string is used in place, then the string + * is not allowed to grow + */ + start_piece->used = src->multi_src.length = + src->multi_src.piece_size - 1; + + start_piece->text[src->multi_src.length] = (wchar_t)0; + return (XawEditError); + } + } + + if (start_piece->used == src->multi_src.piece_size) { + BreakPiece(src, start_piece); + start_piece = FindPiece(src, startPos, &start_first); + } + + fill = Min((int)(src->multi_src.piece_size - start_piece->used), length); + + ptr = start_piece->text + (startPos - start_first); + memmove(ptr + fill, ptr, (start_piece->used - + (startPos - start_first)) * sizeof(wchar_t)); + wptr =(wchar_t *)text.ptr; + (void)wcsncpy(ptr, wptr + firstPos, fill); + + startPos += fill; + firstPos += fill; + start_piece->used += fill; + length -= fill; + } + } + + if (local_artificial_block == True) + /* In other words, text is not the u_text that the user handed me but + one I made myself. I only care, because I need to free the string */ + XtFree(text.ptr); + + if (src->multi_src.use_string_in_place) + start_piece->text[start_piece->used] = (wchar_t)0; + +#ifdef OLDXAW + src->multi_src.changes = True; + XtCallCallbacks(w, XtNcallback, NULL); +#endif + + return (XawEditDone); +} + +/* + * Function: + * Scan + * + * Parameters: + * w - MultiSource widget + * position - position to start scanning + * type - type of thing to scan for + * dir - direction to scan + * count - which occurance if this thing to search for + * include - whether or not to include the character found in + * the position that is returned + * + * Description: + * Scans the text source for the number and type of item specified. + * + * Returns: + * The position of the item found + * + * Note: + * While there are only 'n' characters in the file there are n+1 + * possible cursor positions (one before the first character and + * one after the last character + */ +static XawTextPosition +Scan(Widget w, register XawTextPosition position, XawTextScanType type, + XawTextScanDirection dir, int count, Bool include) +{ + MultiSrcObject src = (MultiSrcObject)w; + register char inc; + MultiPiece *piece; + XawTextPosition first, first_eol_position = position; + register wchar_t *ptr; + int cnt = count; + + if (type == XawstAll) { + if (dir == XawsdRight) + return (src->multi_src.length); + return (0); + } + + /* STEP 1: basic sanity checks */ + if (position > src->multi_src.length) + position = src->multi_src.length; + + if (dir == XawsdRight) { + if (position == src->multi_src.length) + return (src->multi_src.length); + inc = 1; + } + else { + if (position == 0) + return (0); + inc = -1; + position--; + } + + piece = FindPiece(src, position, &first); + + if (piece->used == 0) + return (0); + + ptr = (position - first) + piece->text; + + switch (type) { + case XawstEOL: + case XawstParagraph: + case XawstWhiteSpace: + case XawstAlphaNumeric: + for (; cnt > 0 ; cnt--) { + Bool non_space = False, first_eol = True; + + /*CONSTCOND*/ + while (True) { + register wchar_t c; + + if (ptr < piece->text) { + piece = piece->prev; + if (piece == NULL) /* Begining of text */ + return (0); + ptr = piece->text + piece->used - 1; + c = *ptr; + } + else if (ptr >= piece->text + piece->used) { + piece = piece->next; + if (piece == NULL) /* End of text */ + return (src->multi_src.length); + ptr = piece->text; + } + + c = *ptr; + ptr += inc; + position += inc; + + if (type == XawstAlphaNumeric) { + if (!iswalnum(c)) { + if (non_space) + break; + } + else + non_space = True; + } + else if (type == XawstWhiteSpace) { + if (iswspace(c)) { + if (non_space) + break; + } + else + non_space = True; + } + else if (type == XawstEOL) { + if (c == _Xaw_atowc(XawLF)) + break; + } + else { /* XawstParagraph */ + if (first_eol) { + if (c == _Xaw_atowc(XawLF)) { + first_eol_position = position; + first_eol = False; + } + } + else + if (c == _Xaw_atowc(XawLF)) + break; + else if (!iswspace(c)) + first_eol = True; + } + } + } + if (!include) { + if (type == XawstParagraph) + position = first_eol_position; + if (count) + position -= inc; + } + break; + case XawstPositions: + position += count * inc; + break; + default: + break; + } + + if (dir == XawsdLeft) + position++; + + if (position >= src->multi_src.length) + return (src->multi_src.length); + if (position < 0) + return (0); + + return (position); +} + +/* + * Function: + * Search + * + * Parameters: + * w - MultiSource objecy + * position - position to start scanning + * dir - direction to scan + * text - text block to search for + * + * Description: + * Searchs the text source for the text block passed. + * + * Returns: + * The position of the item found + */ +static XawTextPosition +Search(Widget w, register XawTextPosition position, XawTextScanDirection dir, + XawTextBlock *text) +{ + MultiSrcObject src = (MultiSrcObject)w; + register int count = 0; + wchar_t *ptr; + wchar_t *wtarget; + int wtarget_len; + Display *d = XtDisplay(XtParent(w)); + MultiPiece *piece; + wchar_t *buf; + XawTextPosition first; + register char inc; + int cnt; + + /* STEP 1: First, a brief sanity check */ + if (dir == XawsdRight) + inc = 1; + else { + inc = -1; + if (position == 0) + return (XawTextSearchError); + position--; + } + + /* STEP 2: Ensure I have a local wide string.. */ + + /* Since this widget stores 32bit chars, I check here to see if + I'm being passed a string claiming to be 8bit chars (ie, MB text.) + If that is the case, naturally I convert to 32bit format */ + + /*if the block was FMT8BIT, length will convert to REAL wchar count bellow */ + wtarget_len = text->length; + + if (text->format == XawFmtWide) + wtarget = &(((wchar_t*)text->ptr) [text->firstPos]); + else { + /* The following converts wtarget_len from byte len to wchar count */ + wtarget = _XawTextMBToWC(d, &text->ptr[text->firstPos], &wtarget_len); + } + + /* OK, I can now assert that wtarget holds wide characters, wtarget_len + holds an accurate count of those characters, and that firstPos has been + effectively factored out of the following computations */ + + /* STEP 3: SEARCH! */ + buf = (wchar_t *)XtMalloc(sizeof(wchar_t) * wtarget_len); + (void)wcsncpy(buf, wtarget, wtarget_len); + piece = FindPiece(src, position, &first); + ptr = (position - first) + piece->text; + + /*CONSTCOND*/ + while (True) { + if (*ptr == (dir == XawsdRight ? *(buf + count) + : *(buf + wtarget_len - count - 1))) { + if (count == text->length - 1) + break; + else + count++; + } + else { + if (count != 0) { + position -=inc * count; + ptr -= inc * count; + } + count = 0; + } + + ptr += inc; + position += inc; + + while (ptr < piece->text) { + cnt = piece->text - ptr; + + piece = piece->prev; + if (piece == NULL) { /* Begining of text */ + XtFree((char *)buf); + return (XawTextSearchError); + } + ptr = piece->text + piece->used - cnt; + } + + while (ptr >= piece->text + piece->used) { + cnt = ptr - (piece->text + piece->used); + + piece = piece->next; + if (piece == NULL) { /* End of text */ + XtFree((char *)buf); + return (XawTextSearchError); + } + ptr = piece->text + cnt; + } + } + + XtFree((char *)buf); + if (dir == XawsdLeft) + return(position); + + return(position - (wtarget_len - 1)); +} + +/* + * Function: + * XawMultiSrcSetValues + * + * Parameters: + * current - current state of the widget + * request - what was requested + * cnew - what the widget will become + * args - representation of resources that have changed + * num_args - number of changed resources + * + * Description: + * Sets the values for the MultiSource. + * + * Returns: + * True if redisplay is needed + */ +static Boolean +XawMultiSrcSetValues(Widget current, Widget request, Widget cnew, + ArgList args, Cardinal *num_args) +{ + MultiSrcObject src = (MultiSrcObject)cnew; + MultiSrcObject old_src = (MultiSrcObject)current; + XtAppContext app_con = XtWidgetToApplicationContext(cnew); + Bool total_reset = False, string_set = False; + FILE *file; + unsigned int i; + + if (old_src->multi_src.use_string_in_place + != src->multi_src.use_string_in_place) { + XtAppWarning(app_con, + "MultiSrc: The XtNuseStringInPlace resources " + "may not be changed."); + src->multi_src.use_string_in_place = + old_src->multi_src.use_string_in_place; + } + + for (i = 0; i < *num_args ; i++) + if (streq(args[i].name, XtNstring)) { + string_set = True; + break; + } + + if (string_set || old_src->multi_src.type != src->multi_src.type) { + RemoveOldStringOrFile(old_src, string_set); + src->multi_src.allocated_string = old_src->multi_src.allocated_string; + file = InitStringOrFile(src, string_set); + + LoadPieces(src, file, NULL); + if (file != NULL) + fclose(file); +#ifndef OLDXAW + for (i = 0; i < src->text_src.num_text; i++) + /* Tell text widget what happened */ + XawTextSetSource(src->text_src.text[i], cnew, 0); +#else + XawTextSetSource(XtParent(cnew), cnew, 0); +#endif + total_reset = True; + } + + if (old_src->multi_src.multi_length != src->multi_src.multi_length) + src->multi_src.piece_size = src->multi_src.multi_length + 1; + + if ( !total_reset && old_src->multi_src.piece_size + != src->multi_src.piece_size) { + String mb_string = StorePiecesInString(old_src); + + if (mb_string != 0) { + FreeAllPieces(old_src); + LoadPieces(src, NULL, mb_string); + XtFree(mb_string); + } + else { + /* If the buffer holds bad chars, don't touch it... */ + XtAppWarningMsg(app_con, + "convertError", "multiSource", "XawError", + XtName(XtParent((Widget)old_src)), NULL, NULL); + XtAppWarningMsg(app_con, + "convertError", "multiSource", "XawError", + "Non-character code(s) in buffer.", NULL, NULL); + } + } + + return (False); +} + +static void +XawMultiSrcGetValuesHook(Widget w, ArgList args, Cardinal *num_args) +{ + MultiSrcObject src = (MultiSrcObject)w; + unsigned int i; + + if (src->multi_src.type == XawAsciiString) { + for (i = 0; i < *num_args ; i++) { + if (streq(args[i].name, XtNstring)) { + if (src->multi_src.use_string_in_place) + *((char **)args[i].value) = (char *) + src->multi_src.first_piece->text; + else if (_XawMultiSave(w)) /* If save sucessful */ + *((char **)args[i].value) = (char *)src->multi_src.string; + break; + } + } + } +} + +static void +XawMultiSrcDestroy(Widget w) +{ + RemoveOldStringOrFile((MultiSrcObject) w, True); +} + +/* + * Public routines + */ +/* + * Function: + * XawMultiSourceFreeString + * + * Parameters: + * w - MultiSrc widget + * + * Description: + * Frees the string returned by a get values call + * on the string when the source is of type string. + * + * Note: + * The public interface is XawAsciiSourceFreeString! + */ +void +_XawMultiSourceFreeString(Widget w) +{ + MultiSrcObject src = (MultiSrcObject)w; + + if (src->multi_src.allocated_string) { + XtFree((char *)src->multi_src.string); + src->multi_src.allocated_string = False; + src->multi_src.string = NULL; + } +} + +/* + * Function: + * _XawMultiSave + * + * Parameters: + * w - multiSrc Widget + * + * Description: + * Saves all the pieces into a file or string as required. + * + * Returns: + * True if the save was successful + * + * Note: + * The public interface is XawAsciiSave(w)! + */ +Bool +_XawMultiSave(Widget w) +{ + MultiSrcObject src = (MultiSrcObject)w; + XtAppContext app_con = XtWidgetToApplicationContext(w); + char *mb_string; + + /* + * If using the string in place then there is no need to play games + * to get the internal info into a readable string + */ + if (src->multi_src.use_string_in_place) + return (True); + + if (src->multi_src.type == XawAsciiFile) { +#ifdef OLDXAW + if (!src->multi_src.changes) +#else + if (!src->text_src.changed) /* No changes to save */ +#endif + return (True); + + mb_string = StorePiecesInString(src); + + if (mb_string != 0) { + if (WriteToFile(mb_string, (String)src->multi_src.string) == False) { + XtFree(mb_string); + return (False); + } + XtFree(mb_string); +#ifndef OLDXAW + src->text_src.changed = False; +#else + src->multi_src.changes = False; +#endif + return (True); + } + else { + /* If the buffer holds bad chars, don't touch it... */ + XtAppWarningMsg(app_con, + "convertError", "multiSource", "XawError", + "Due to illegal characters, file not saved.", + NULL, NULL); + return (False); + } + } + else { + /* THIS FUNCTIONALITY IS UNDOCUMENTED, probably UNNEEDED? The manual + says this routine's only function is to save files to + disk. -Sheeran */ + mb_string = StorePiecesInString(src); + + if (mb_string == 0) { + /* If the buffer holds bad chars, don't touch it... */ + XtAppWarningMsg(app_con, + "convertError", "multiSource", "XawError", + XtName(XtParent((Widget)src)), NULL, NULL); + return (False); + } + + /* assert: mb_string holds good characters so the buffer is fine */ + if (src->multi_src.allocated_string == True) + XtFree((char *)src->multi_src.string); + else + src->multi_src.allocated_string = True; + + src->multi_src.string = mb_string; + } +#ifdef OLDXAW + src->multi_src.changes = False; +#else + src->text_src.changed = False; +#endif + + return (True); +} + +/* + * Function: + * XawMultiSaveAsFile + * + * Parameters: + * w - MultiSrc widget + * name - name of the file to save this file into + * + * Description: + * Save the current buffer as a file. + * + * Returns: + * True if the save was sucessful + * + * Note: + * The public interface is XawAsciiSaveAsFile! + */ +Bool +_XawMultiSaveAsFile(Widget w, _Xconst char* name) +{ + MultiSrcObject src = (MultiSrcObject)w; + String mb_string; + Bool ret; + + mb_string = StorePiecesInString(src); + + if (mb_string != 0) { + ret = WriteToFile(mb_string, (char *)name); + XtFree(mb_string); + + return (ret); + } + + /* otherwise there was a conversion error. So print widget name too */ + XtAppWarningMsg(XtWidgetToApplicationContext(w), + "convertError", "multiSource", "XawError", + XtName(XtParent(w)), NULL, NULL); + + return (False); +} + +/* + * Private Functions + */ +static void +RemoveOldStringOrFile(MultiSrcObject src, Bool checkString) +{ + FreeAllPieces(src); + + if (checkString && src->multi_src.allocated_string) { + XtFree((char *)src->multi_src.string); + src->multi_src.allocated_string = False; + src->multi_src.string = NULL; + } +} + +/* + * Function: + * WriteToFile + * + * Parameters: + * string - string to write + * name - name of the file + * + * Description: + * Write the string specified to the begining of the file specified. + * + * Returns: + * Returns True if sucessful, False otherwise + */ +static Bool +WriteToFile(String string, String name) +{ + int fd; + + if (((fd = creat(name, 0666)) == -1) + || (write(fd, string, strlen(string)) == -1)) + return (False); + + if (close(fd) == -1) + return (False); + + return (True); +} + + +/* + * Function: + * StorePiecesInString + * + * Parameters: + * src - the multiSrc object to gather data from + * + * Description: + * Store the pieces in memory into a char string. + * + * Returns: + * mb_string: Caller must free + * (or) + * NULL: conversion error + */ +static String +StorePiecesInString(MultiSrcObject src) +{ + wchar_t *wc_string; + char *mb_string; + int char_count = src->multi_src.length; + XawTextPosition first; + MultiPiece *piece; + + /* I believe the char_count + 1 and the NULL termination are unneeded! FS */ + wc_string = (wchar_t*)XtMalloc((char_count + 1) * sizeof(wchar_t)); + + for (first = 0, piece = src->multi_src.first_piece ; piece != NULL; + first += piece->used, piece = piece->next) + (void)wcsncpy(wc_string + first, piece->text, piece->used); + + wc_string[char_count] = 0; + + /* This will refill all pieces to capacity */ + if (src->multi_src.data_compression) { + FreeAllPieces(src); + LoadPieces(src, NULL, (char *)wc_string); + } + + /* Lastly, convert it to a MB format and send it back */ + mb_string = _XawTextWCToMB(XtDisplayOfObject((Widget)src), + wc_string, &char_count); + + /* NOTE THAT mb_string MAY BE ZERO IF THE CONVERSION FAILED */ + XtFree((char*)wc_string); + + return (mb_string); +} + +/* + * Function: + * InitStringOrFile + * + * Parameters: + * src - MultiSource + * + * Description: + * Initializes the string or file. + */ +static FILE * +InitStringOrFile(MultiSrcObject src, Bool newString) +{ + mode_t open_mode = 0; + const char *fdopen_mode = NULL; + int fd; + FILE *file; + Display *d = XtDisplayOfObject((Widget)src); + + if (src->multi_src.type == XawAsciiString) { + if (src->multi_src.string == NULL) + src->multi_src.length = 0; + + else if (!src->multi_src.use_string_in_place) { + int length; + String temp = XtNewString((char *)src->multi_src.string); + + if (src->multi_src.allocated_string) + XtFree((char *)src->multi_src.string); + src->multi_src.allocated_string = True; + src->multi_src.string = temp; + + length = strlen((char *)src->multi_src.string); + + /* Wasteful, throwing away the WC string, but need side effect! */ + (void)_XawTextMBToWC(d, (char *)src->multi_src.string, &length); + src->multi_src.length = (XawTextPosition)length; + } + else { + src->multi_src.length = strlen((char *)src->multi_src.string); + /* In case the length resource is incorrectly set */ + if (src->multi_src.length > src->multi_src.multi_length) + src->multi_src.multi_length = src->multi_src.length; + + if (src->multi_src.multi_length == MAGIC_VALUE) + src->multi_src.piece_size = src->multi_src.length; + else + src->multi_src.piece_size = src->multi_src.multi_length + 1; + } + + return (NULL); + } + + /* + * type is XawAsciiFile + */ + src->multi_src.is_tempfile = False; + + switch (src->text_src.edit_mode) { + case XawtextRead: + if (src->multi_src.string == NULL) + XtErrorMsg("NoFile", "multiSourceCreate", "XawError", + "Creating a read only disk widget and no file specified.", + NULL, 0); + open_mode = O_RDONLY; + fdopen_mode = "r"; + break; + case XawtextAppend: + case XawtextEdit: + if (src->multi_src.string == NULL) { + src->multi_src.string = "*multi-src*"; + src->multi_src.is_tempfile = True; + } + else { +/* O_NOFOLLOW is a BSD & Linux extension */ +#ifdef O_NOFOLLOW + open_mode = O_RDWR | O_NOFOLLOW; +#else + open_mode = O_RDWR; /* unsafe; subject to race conditions */ +#endif + fdopen_mode = "r+"; + } + break; + default: + XtErrorMsg("badMode", "multiSourceCreate", "XawError", + "Bad editMode for multi source; must be " + "Read, Append or Edit.", NULL, NULL); + } + + /* If is_tempfile, allocate a private copy of the text + * Unlikely to be changed, just to set allocated_string */ + if (newString || src->multi_src.is_tempfile) { + String temp = XtNewString((char *)src->multi_src.string); + + if (src->multi_src.allocated_string) + XtFree((char *)src->multi_src.string); + src->multi_src.string = temp; + src->multi_src.allocated_string = True; + } + + if (!src->multi_src.is_tempfile) { + if ((fd = open((char *)src->multi_src.string, open_mode, 0666)) != -1) { + if ((file = fdopen(fd, fdopen_mode)) != NULL) { + (void)fseek(file, 0, SEEK_END); + src->multi_src.length = (XawTextPosition)ftell(file); + return(file); + } + } + { + String params[2]; + Cardinal num_params = 2; + + params[0] = (String)src->multi_src.string; + params[1] = strerror(errno); + XtAppWarningMsg(XtWidgetToApplicationContext((Widget)src), + "openError", "multiSourceCreate", "XawWarning", + "Cannot open file %s; %s", params, &num_params); + } + } + src->multi_src.length = 0; + return (NULL); +} + +/* LoadPieces: This routine takes either the MB contents of open file + `file' or the MB contents of string or the MB contents of + src->multi_src.string and places them in Pieces in WC format. + + CAUTION: You must have src->multi_src.length set to file length bytes + when src->multi_src.type == XawAsciiFile. src->multi_src.length must be + the length of the parameter string if string is non-NULL +*/ +static void +LoadPieces(MultiSrcObject src, FILE *file, char *string) +{ + Display *d = XtDisplayOfObject((Widget)src); + wchar_t* local_str, *ptr; + MultiPiece* piece = NULL; + XawTextPosition left; + int bytes = sizeof(wchar_t); + char* temp_mb_holder = NULL; + + /* + * This is tricky - the _XawTextMBtoWC converter uses its 3rd arg + * in as MB length, out as WC length. We want local_length to be + * WC count. + */ + int local_length = src->multi_src.length; + + if (string != NULL) { + /* + * ASSERT: IF our caller passed a non-null string, THEN + * src->multi_src.length is currently string's * byte count, + * AND string is in a MB format + */ + local_str = _XawTextMBToWC(d, (char *)string, &local_length); + src->multi_src.length = (XawTextPosition) local_length; + } + else if (src->multi_src.type != XawAsciiFile) { + /* + * here, we are not changing the contents, just reloading, + * so don't change len... + */ + local_length = src->multi_src.string ? + strlen((char *)src->multi_src.string) : 0; + local_str = _XawTextMBToWC(d, (char *)src->multi_src.string, + &local_length); + } + else { + if (src->multi_src.length != 0) { + temp_mb_holder = + XtMalloc((src->multi_src.length + 1) * sizeof(unsigned char)); + fseek(file, 0, 0); + src->multi_src.length = fread(temp_mb_holder, + (Size_t)sizeof(unsigned char), + (Size_t)src->multi_src.length, file); + if (src->multi_src.length <= 0) + XtAppErrorMsg(XtWidgetToApplicationContext ((Widget) src), + "readError", "multiSource", "XawError", + "fread returned error.", NULL, NULL); + local_length = src->multi_src.length; + local_str = _XawTextMBToWC(d, temp_mb_holder, &local_length); + src->multi_src.length = local_length; + + if (local_str == 0) { + String params[2]; + Cardinal num_params; + static char err_text[] = + "<<< FILE CONTENTS NOT REPRESENTABLE IN THIS LOCALE >>>"; + + params[0] = XtName(XtParent((Widget)src)); + params[1] = src->multi_src.string; + num_params = 2; + + XtAppWarningMsg(XtWidgetToApplicationContext((Widget)src), + "readLocaleError", "multiSource", "XawError", + "%s: The file `%s' contains characters " + "not representable in this locale.", + params, &num_params); + src->multi_src.length = sizeof err_text; + local_length = src->multi_src.length; + local_str = _XawTextMBToWC(d, err_text, &local_length); + src->multi_src.length = local_length; + } + } + else + /* ASSERT that since following while loop looks at local_length + this isn't needed. Sheeran, Omron KK, 1993/07/15 + temp_mb_holder[src->multi_src.length] = '\0'; */ + local_str = (wchar_t*)temp_mb_holder; + } + + if (src->multi_src.use_string_in_place) { + piece = AllocNewPiece(src, piece); + piece->used = Min(src->multi_src.length, src->multi_src.piece_size); + piece->text = (wchar_t*)src->multi_src.string; + return; + } + + ptr = local_str; + left = local_length; + + do { + piece = AllocNewPiece(src, piece); + + piece->text = (wchar_t*)XtMalloc((unsigned)(src->multi_src.piece_size + * bytes)); + piece->used = Min(left, src->multi_src.piece_size); + if (piece->used != 0) + (void)wcsncpy(piece->text, ptr, piece->used); + + left -= piece->used; + ptr += piece->used; + } while (left > 0); + + if (temp_mb_holder) + XtFree((char*)temp_mb_holder); +} + +/* + * Function: + * AllocNewPiece + * + * Parameters: + * src - MultiSrc Widget + * prev - the piece just before this one, or NULL + * + * Description: + * Allocates a new piece of memory. + * + * Returns: + * The allocated piece + */ +static MultiPiece * +AllocNewPiece(MultiSrcObject src, MultiPiece *prev) +{ + MultiPiece *piece = XtNew(MultiPiece); + + if (prev == NULL) { + src->multi_src.first_piece = piece; + piece->next = NULL; + } + else { + if (prev->next != NULL) + (prev->next)->prev = piece; + piece->next = prev->next; + prev->next = piece; + } + + piece->prev = prev; + + return (piece); +} + +/* + * Function: + * FreeAllPieces + * + * Parameters: + * src - MultiSrc Widget + * + * Description: + * Frees all the pieces + */ +static void +FreeAllPieces(MultiSrcObject src) +{ + MultiPiece *next, *first = src->multi_src.first_piece; + +#ifdef DEBUG + if (first->prev != NULL) + printf("Xaw MultiSrc Object: possible memory leak in FreeAllPieces().\n"); +#endif + + for (; first != NULL ; first = next) { + next = first->next; + RemovePiece(src, first); + } +} + +/* + * Function: + * RemovePiece + * + * Parameters: + * piece - piece to remove + * + * Description: + * Removes a piece from the list. + */ +static void +RemovePiece(MultiSrcObject src, MultiPiece *piece) +{ + if (piece->prev == NULL) + src->multi_src.first_piece = piece->next; + else + piece->prev->next = piece->next; + + if (piece->next != NULL) + piece->next->prev = piece->prev; + + if (!src->multi_src.use_string_in_place) + XtFree((char *)piece->text); + + XtFree((char *)piece); +} + +/* + * Function: + * FindPiece + * + * Parameters: + * src - MultiSrc Widget + * position - position that we are searching for + * first - position of the first character in this piece (return) + * + * Description: + * Finds the piece containing the position indicated. + * + * Returns: + * Piece that contains this position + */ +static MultiPiece * +FindPiece(MultiSrcObject src, XawTextPosition position, XawTextPosition *first) +{ + MultiPiece *old_piece, *piece; + XawTextPosition temp; + + for (old_piece = NULL, piece = src->multi_src.first_piece, temp = 0; + piece; old_piece = piece, piece = piece->next) + if ((temp += piece->used) > position) { + *first = temp - piece->used; + return (piece); + } + + *first = temp - (old_piece ? old_piece->used : 0); + + return (old_piece); /* if we run off the end the return the last piece */ +} + +/* + * Function: + * BreakPiece + * + * Parameters: + * src - MultiSrc Widget + * piece - piece to break + * + * Description: + * Breaks a full piece into two new pieces. + */ +#define HALF_PIECE (src->multi_src.piece_size >> 1) +static void +BreakPiece(MultiSrcObject src, MultiPiece *piece) +{ + MultiPiece *cnew = AllocNewPiece(src, piece); + + cnew->text = (wchar_t *) + XtMalloc(src->multi_src.piece_size * sizeof(wchar_t)); + (void)wcsncpy(cnew->text, piece->text + HALF_PIECE, + src->multi_src.piece_size - HALF_PIECE); + piece->used = HALF_PIECE; + cnew->used = src->multi_src.piece_size - HALF_PIECE; +} + +/*ARGSUSED*/ +static void +CvtStringToMultiType(XrmValuePtr args, Cardinal *num_args, + XrmValuePtr fromVal, XrmValuePtr toVal) +{ + static XawAsciiType type = XawAsciiString; + XrmQuark q; + char name[7]; + + XmuNCopyISOLatin1Lowered(name, (char *)fromVal->addr, sizeof(name)); + q = XrmStringToQuark(name); + + if (q == Qstring) + type = XawAsciiString; + if (q == Qfile) + type = XawAsciiFile; + else { + toVal->size = 0; + toVal->addr = NULL; + XtStringConversionWarning((char *)fromVal->addr, XtRAsciiType); + } + + toVal->size = sizeof(XawAsciiType); + toVal->addr = (XPointer)&type; +} + +/*ARGSUSED*/ +static Boolean +CvtMultiTypeToString(Display *dpy, XrmValuePtr args, Cardinal *num_args, + XrmValuePtr fromVal, XrmValuePtr toVal, + XtPointer *data) +{ + static String buffer; + Cardinal size; + + switch (*(XawAsciiType *)fromVal->addr) { + case XawAsciiFile: + buffer = XtEfile; + break; + case XawAsciiString: + buffer = XtEstring; + break; + default: + XawTypeToStringWarning(dpy, XtRAsciiType); + toVal->addr = NULL; + toVal->size = 0; + return (False); + } + + size = strlen(buffer) + 1; + if (toVal->addr != NULL) { + if (toVal->size < size) { + toVal->size = size; + return (False); + } + strcpy((char *)toVal->addr, buffer); + } + else + toVal->addr = (XPointer)buffer; + toVal->size = sizeof(String); + + return (True); +} + +/*ARGSUSED*/ +static void +GetDefaultPieceSize(Widget w, int offset, XrmValue *value) +{ + static XPointer pagesize; + + if (pagesize == 0) { + pagesize = (XPointer)((long)_XawGetPageSize()); + if (pagesize < (XPointer)BUFSIZ) + pagesize = (XPointer)BUFSIZ; + } + + value->addr = (XPointer)&pagesize; +} |