mirror of
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6ec06edbbf
* demos/gtk-demo/main.c: (load_file): isspace -> g_ascii_isspace * gdk/x11/gdkim-x11.c: Remove gdki8n.h include. * gdk/x11/gdkkeys-x11.c: Remove <ctype.h> include. * gdk/x11/gdkmain-x11.c: Remove <ctype.h> include. * gtk/fnmatch.c: Remove <ctype.h> include. * gtk/gtkaccelgroup.c: Remove <ctype.h> include. * gtk/gtkaccellabel.c: (gtk_accel_label_refetch): toupper -> g_unichar_toupper, toupper -> g_unichar_totile * gtk/gtkbindings.c: Remove <ctype.h> include. * gtk/gtkfontsel.c: Remove <ctype.h> include. * gtk/gtkiconfactory.c: Remove <ctype.h> include. * gtk/gtkinputdialog.c: Remove <ctype.h> include. * gtk/gtklabel.c: Remove <ctype.h> include. * gtk/gtkmain.c: Remove <ctype.h> include. * gtk/gtkmenu.c: Remove <ctype.h> include. * gtk/gtkoldeditable.c: Remove <ctype.h> include. * gtk/gtkrc.c: Remove <ctype.h> include. * gtk/gtktextbtree.c: Remove <ctype.h> include. * gtk/gtktextiter.c: Remove <ctype.h> include. * gtk/gtktextsegment.c: Remove <ctype.h> include.
624 lines
19 KiB
C
624 lines
19 KiB
C
/*
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* gtktextsegment.c --
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*
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* Code for segments in general, and toggle/char segments in particular.
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*
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* Copyright (c) 1992-1994 The Regents of the University of California.
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* Copyright (c) 1994-1995 Sun Microsystems, Inc.
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* Copyright (c) 2000 Red Hat, Inc.
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* Tk -> Gtk port by Havoc Pennington <hp@redhat.com>
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*
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* This software is copyrighted by the Regents of the University of
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* California, Sun Microsystems, Inc., and other parties. The
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* following terms apply to all files associated with the software
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* unless explicitly disclaimed in individual files.
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*
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* The authors hereby grant permission to use, copy, modify,
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* distribute, and license this software and its documentation for any
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* purpose, provided that existing copyright notices are retained in
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* all copies and that this notice is included verbatim in any
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* distributions. No written agreement, license, or royalty fee is
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* required for any of the authorized uses. Modifications to this
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* software may be copyrighted by their authors and need not follow
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* the licensing terms described here, provided that the new terms are
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* clearly indicated on the first page of each file where they apply.
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*
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* IN NO EVENT SHALL THE AUTHORS OR DISTRIBUTORS BE LIABLE TO ANY
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* PARTY FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
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* DAMAGES ARISING OUT OF THE USE OF THIS SOFTWARE, ITS DOCUMENTATION,
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* OR ANY DERIVATIVES THEREOF, EVEN IF THE AUTHORS HAVE BEEN ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* THE AUTHORS AND DISTRIBUTORS SPECIFICALLY DISCLAIM ANY WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, AND
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* NON-INFRINGEMENT. THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS,
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* AND THE AUTHORS AND DISTRIBUTORS HAVE NO OBLIGATION TO PROVIDE
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* MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
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*
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* GOVERNMENT USE: If you are acquiring this software on behalf of the
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* U.S. government, the Government shall have only "Restricted Rights"
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* in the software and related documentation as defined in the Federal
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* Acquisition Regulations (FARs) in Clause 52.227.19 (c) (2). If you
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* are acquiring the software on behalf of the Department of Defense,
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* the software shall be classified as "Commercial Computer Software"
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* and the Government shall have only "Restricted Rights" as defined
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* in Clause 252.227-7013 (c) (1) of DFARs. Notwithstanding the
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* foregoing, the authors grant the U.S. Government and others acting
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* in its behalf permission to use and distribute the software in
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* accordance with the terms specified in this license.
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*
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*/
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#define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
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#include "gtktextbtree.h"
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "gtktexttag.h"
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#include "gtktexttagtable.h"
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#include "gtktextlayout.h"
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#include "gtktextiterprivate.h"
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#include "gtkdebug.h"
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/*
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*--------------------------------------------------------------
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*
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* split_segment --
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*
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* This procedure is called before adding or deleting
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* segments. It does three things: (a) it finds the segment
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* containing iter; (b) if there are several such
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* segments (because some segments have zero length) then
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* it picks the first segment that does not have left
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* gravity; (c) if the index refers to the middle of
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* a segment then it splits the segment so that the
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* index now refers to the beginning of a segment.
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*
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* Results:
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* The return value is a pointer to the segment just
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* before the segment corresponding to iter (as
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* described above). If the segment corresponding to
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* iter is the first in its line then the return
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* value is NULL.
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*
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* Side effects:
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* The segment referred to by iter is split unless
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* iter refers to its first character.
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*
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*--------------------------------------------------------------
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*/
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GtkTextLineSegment*
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gtk_text_line_segment_split (const GtkTextIter *iter)
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{
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GtkTextLineSegment *prev, *seg;
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GtkTextBTree *tree;
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GtkTextLine *line;
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int count;
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line = _gtk_text_iter_get_text_line (iter);
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tree = _gtk_text_iter_get_btree (iter);
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count = gtk_text_iter_get_line_index (iter);
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if (gtk_debug_flags & GTK_DEBUG_TEXT)
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_gtk_text_iter_check (iter);
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prev = NULL;
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seg = line->segments;
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while (seg != NULL)
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{
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if (seg->byte_count > count)
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{
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if (count == 0)
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{
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return prev;
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}
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else
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{
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g_assert (count != seg->byte_count);
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g_assert (seg->byte_count > 0);
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_gtk_text_btree_segments_changed (tree);
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seg = (*seg->type->splitFunc)(seg, count);
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if (prev == NULL)
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line->segments = seg;
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else
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prev->next = seg;
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return seg;
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}
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}
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else if ((seg->byte_count == 0) && (count == 0)
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&& !seg->type->leftGravity)
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{
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return prev;
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}
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count -= seg->byte_count;
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prev = seg;
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seg = seg->next;
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}
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g_error ("split_segment reached end of line!");
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return NULL;
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}
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/*
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* Macros that determine how much space to allocate for new segments:
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*/
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#define CSEG_SIZE(chars) ((unsigned) (G_STRUCT_OFFSET (GtkTextLineSegment, body) \
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+ 1 + (chars)))
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#define TSEG_SIZE ((unsigned) (G_STRUCT_OFFSET (GtkTextLineSegment, body) \
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+ sizeof (GtkTextToggleBody)))
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/*
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* Type functions
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*/
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static void
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char_segment_self_check (GtkTextLineSegment *seg)
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{
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/* This function checks the segment itself, but doesn't
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assume the segment has been validly inserted into
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the btree. */
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g_assert (seg != NULL);
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if (seg->byte_count <= 0)
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{
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g_error ("char_segment_check_func: segment has size <= 0");
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}
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if (strlen (seg->body.chars) != seg->byte_count)
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{
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g_error ("char_segment_check_func: segment has wrong size");
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}
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if (g_utf8_strlen (seg->body.chars, seg->byte_count) != seg->char_count)
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{
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g_error ("char segment has wrong character count");
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}
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}
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GtkTextLineSegment*
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_gtk_char_segment_new (const gchar *text, guint len)
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{
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GtkTextLineSegment *seg;
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g_assert (gtk_text_byte_begins_utf8_char (text));
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seg = g_malloc (CSEG_SIZE (len));
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seg->type = >k_text_char_type;
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seg->next = NULL;
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seg->byte_count = len;
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memcpy (seg->body.chars, text, len);
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seg->body.chars[len] = '\0';
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seg->char_count = g_utf8_strlen (seg->body.chars, seg->byte_count);
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if (gtk_debug_flags & GTK_DEBUG_TEXT)
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char_segment_self_check (seg);
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return seg;
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}
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GtkTextLineSegment*
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_gtk_char_segment_new_from_two_strings (const gchar *text1, guint len1,
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const gchar *text2, guint len2)
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{
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GtkTextLineSegment *seg;
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g_assert (gtk_text_byte_begins_utf8_char (text1));
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g_assert (gtk_text_byte_begins_utf8_char (text2));
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seg = g_malloc (CSEG_SIZE (len1+len2));
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seg->type = >k_text_char_type;
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seg->next = NULL;
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seg->byte_count = len1 + len2;
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memcpy (seg->body.chars, text1, len1);
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memcpy (seg->body.chars + len1, text2, len2);
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seg->body.chars[len1+len2] = '\0';
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/* In principle this function could probably take chars1 and chars2
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as args, since it's typically used to merge two char segments */
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seg->char_count = g_utf8_strlen (seg->body.chars, seg->byte_count);
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if (gtk_debug_flags & GTK_DEBUG_TEXT)
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char_segment_self_check (seg);
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return seg;
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}
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/*
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*--------------------------------------------------------------
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*
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* char_segment_split_func --
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*
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* This procedure implements splitting for character segments.
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*
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* Results:
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* The return value is a pointer to a chain of two segments
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* that have the same characters as segPtr except split
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* among the two segments.
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*
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* Side effects:
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* Storage for segPtr is freed.
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*
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*--------------------------------------------------------------
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*/
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static GtkTextLineSegment *
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char_segment_split_func (GtkTextLineSegment *seg, int index)
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{
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GtkTextLineSegment *new1, *new2;
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g_assert (index < seg->byte_count);
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if (gtk_debug_flags & GTK_DEBUG_TEXT)
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{
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char_segment_self_check (seg);
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}
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new1 = _gtk_char_segment_new (seg->body.chars, index);
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new2 = _gtk_char_segment_new (seg->body.chars + index, seg->byte_count - index);
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g_assert (gtk_text_byte_begins_utf8_char (new1->body.chars));
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g_assert (gtk_text_byte_begins_utf8_char (new2->body.chars));
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g_assert (new1->byte_count + new2->byte_count == seg->byte_count);
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g_assert (new1->char_count + new2->char_count == seg->char_count);
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new1->next = new2;
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new2->next = seg->next;
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if (gtk_debug_flags & GTK_DEBUG_TEXT)
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{
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char_segment_self_check (new1);
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char_segment_self_check (new2);
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}
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g_free (seg);
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return new1;
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}
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/*
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*--------------------------------------------------------------
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*
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* char_segment_cleanup_func --
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*
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* This procedure merges adjacent character segments into
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* a single character segment, if possible.
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*
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* Results:
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* The return value is a pointer to the first segment in
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* the (new) list of segments that used to start with segPtr.
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*
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* Side effects:
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* Storage for the segments may be allocated and freed.
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*
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*--------------------------------------------------------------
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*/
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/* ARGSUSED */
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static GtkTextLineSegment *
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char_segment_cleanup_func (segPtr, line)
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GtkTextLineSegment *segPtr; /* Pointer to first of two adjacent
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* segments to join. */
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GtkTextLine *line; /* Line containing segments (not
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* used). */
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{
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GtkTextLineSegment *segPtr2, *newPtr;
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if (gtk_debug_flags & GTK_DEBUG_TEXT)
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char_segment_self_check (segPtr);
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segPtr2 = segPtr->next;
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if ((segPtr2 == NULL) || (segPtr2->type != >k_text_char_type))
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{
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return segPtr;
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}
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newPtr =
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_gtk_char_segment_new_from_two_strings (segPtr->body.chars, segPtr->byte_count,
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segPtr2->body.chars, segPtr2->byte_count);
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newPtr->next = segPtr2->next;
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if (gtk_debug_flags & GTK_DEBUG_TEXT)
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char_segment_self_check (newPtr);
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g_free (segPtr);
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g_free (segPtr2);
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return newPtr;
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}
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/*
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*--------------------------------------------------------------
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*
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* char_segment_delete_func --
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*
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* This procedure is invoked to delete a character segment.
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*
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* Results:
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* Always returns 0 to indicate that the segment was deleted.
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*
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* Side effects:
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* Storage for the segment is freed.
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*
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*--------------------------------------------------------------
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*/
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/* ARGSUSED */
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static int
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char_segment_delete_func (segPtr, line, treeGone)
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GtkTextLineSegment *segPtr; /* Segment to delete. */
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GtkTextLine *line; /* Line containing segment. */
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int treeGone; /* Non-zero means the entire tree is
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* being deleted, so everything must
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* get cleaned up. */
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{
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g_free ((char*) segPtr);
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return 0;
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}
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/*
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*--------------------------------------------------------------
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*
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* char_segment_check_func --
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*
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* This procedure is invoked to perform consistency checks
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* on character segments.
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*
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* Results:
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* None.
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*
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* Side effects:
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* If the segment isn't inconsistent then the procedure
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* g_errors.
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*
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*--------------------------------------------------------------
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*/
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/* ARGSUSED */
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static void
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char_segment_check_func (segPtr, line)
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GtkTextLineSegment *segPtr; /* Segment to check. */
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GtkTextLine *line; /* Line containing segment. */
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{
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char_segment_self_check (segPtr);
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if (segPtr->next != NULL)
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{
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if (segPtr->next->type == >k_text_char_type)
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{
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g_error ("char_segment_check_func: adjacent character segments weren't merged");
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}
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}
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}
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GtkTextLineSegment*
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_gtk_toggle_segment_new (GtkTextTagInfo *info, gboolean on)
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{
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GtkTextLineSegment *seg;
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seg = g_malloc (TSEG_SIZE);
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seg->type = on ? >k_text_toggle_on_type : >k_text_toggle_off_type;
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seg->next = NULL;
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seg->byte_count = 0;
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seg->char_count = 0;
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seg->body.toggle.info = info;
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seg->body.toggle.inNodeCounts = 0;
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return seg;
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}
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/*
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*--------------------------------------------------------------
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*
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* toggle_segment_delete_func --
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*
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* This procedure is invoked to delete toggle segments.
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*
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* Results:
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* Returns 1 to indicate that the segment may not be deleted,
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* unless the entire B-tree is going away.
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*
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* Side effects:
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* If the tree is going away then the toggle's memory is
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* freed; otherwise the toggle counts in GtkTextBTreeNodes above the
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* segment get updated.
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*
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*--------------------------------------------------------------
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*/
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static int
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toggle_segment_delete_func (segPtr, line, treeGone)
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GtkTextLineSegment *segPtr; /* Segment to check. */
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GtkTextLine *line; /* Line containing segment. */
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int treeGone; /* Non-zero means the entire tree is
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* being deleted, so everything must
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* get cleaned up. */
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{
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if (treeGone)
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{
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g_free ((char *) segPtr);
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return 0;
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}
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/*
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* This toggle is in the middle of a range of characters that's
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* being deleted. Refuse to die. We'll be moved to the end of
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* the deleted range and our cleanup procedure will be called
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* later. Decrement GtkTextBTreeNode toggle counts here, and set a flag
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* so we'll re-increment them in the cleanup procedure.
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*/
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if (segPtr->body.toggle.inNodeCounts)
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{
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_gtk_change_node_toggle_count (line->parent,
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segPtr->body.toggle.info, -1);
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segPtr->body.toggle.inNodeCounts = 0;
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}
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return 1;
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}
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/*
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*--------------------------------------------------------------
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*
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* toggle_segment_cleanup_func --
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*
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* This procedure is called when a toggle is part of a line that's
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* been modified in some way. It's invoked after the
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* modifications are complete.
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*
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* Results:
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* The return value is the head segment in a new list
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* that is to replace the tail of the line that used to
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* start at segPtr. This allows the procedure to delete
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* or modify segPtr.
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*
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* Side effects:
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* Toggle counts in the GtkTextBTreeNodes above the new line will be
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* updated if they're not already. Toggles may be collapsed
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* if there are duplicate toggles at the same position.
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*
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*--------------------------------------------------------------
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*/
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static GtkTextLineSegment *
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toggle_segment_cleanup_func (segPtr, line)
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GtkTextLineSegment *segPtr; /* Segment to check. */
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GtkTextLine *line; /* Line that now contains segment. */
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{
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GtkTextLineSegment *segPtr2, *prevPtr;
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int counts;
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/*
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* If this is a toggle-off segment, look ahead through the next
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* segments to see if there's a toggle-on segment for the same tag
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* before any segments with non-zero size. If so then the two
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* toggles cancel each other; remove them both.
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*/
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if (segPtr->type == >k_text_toggle_off_type)
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{
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for (prevPtr = segPtr, segPtr2 = prevPtr->next;
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(segPtr2 != NULL) && (segPtr2->byte_count == 0);
|
|
prevPtr = segPtr2, segPtr2 = prevPtr->next)
|
|
{
|
|
if (segPtr2->type != >k_text_toggle_on_type)
|
|
{
|
|
continue;
|
|
}
|
|
if (segPtr2->body.toggle.info != segPtr->body.toggle.info)
|
|
{
|
|
continue;
|
|
}
|
|
counts = segPtr->body.toggle.inNodeCounts
|
|
+ segPtr2->body.toggle.inNodeCounts;
|
|
if (counts != 0)
|
|
{
|
|
_gtk_change_node_toggle_count (line->parent,
|
|
segPtr->body.toggle.info, -counts);
|
|
}
|
|
prevPtr->next = segPtr2->next;
|
|
g_free ((char *) segPtr2);
|
|
segPtr2 = segPtr->next;
|
|
g_free ((char *) segPtr);
|
|
return segPtr2;
|
|
}
|
|
}
|
|
|
|
if (!segPtr->body.toggle.inNodeCounts)
|
|
{
|
|
_gtk_change_node_toggle_count (line->parent,
|
|
segPtr->body.toggle.info, 1);
|
|
segPtr->body.toggle.inNodeCounts = 1;
|
|
}
|
|
return segPtr;
|
|
}
|
|
|
|
/*
|
|
*--------------------------------------------------------------
|
|
*
|
|
* toggle_segment_line_change_func --
|
|
*
|
|
* This procedure is invoked when a toggle segment is about
|
|
* to move from one line to another.
|
|
*
|
|
* Results:
|
|
* None.
|
|
*
|
|
* Side effects:
|
|
* Toggle counts are decremented in the GtkTextBTreeNodes above the line.
|
|
*
|
|
*--------------------------------------------------------------
|
|
*/
|
|
|
|
static void
|
|
toggle_segment_line_change_func (segPtr, line)
|
|
GtkTextLineSegment *segPtr; /* Segment to check. */
|
|
GtkTextLine *line; /* Line that used to contain segment. */
|
|
{
|
|
if (segPtr->body.toggle.inNodeCounts)
|
|
{
|
|
_gtk_change_node_toggle_count (line->parent,
|
|
segPtr->body.toggle.info, -1);
|
|
segPtr->body.toggle.inNodeCounts = 0;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Virtual tables
|
|
*/
|
|
|
|
|
|
GtkTextLineSegmentClass gtk_text_char_type = {
|
|
"character", /* name */
|
|
0, /* leftGravity */
|
|
char_segment_split_func, /* splitFunc */
|
|
char_segment_delete_func, /* deleteFunc */
|
|
char_segment_cleanup_func, /* cleanupFunc */
|
|
NULL, /* lineChangeFunc */
|
|
char_segment_check_func /* checkFunc */
|
|
};
|
|
|
|
/*
|
|
* Type record for segments marking the beginning of a tagged
|
|
* range:
|
|
*/
|
|
|
|
GtkTextLineSegmentClass gtk_text_toggle_on_type = {
|
|
"toggleOn", /* name */
|
|
0, /* leftGravity */
|
|
NULL, /* splitFunc */
|
|
toggle_segment_delete_func, /* deleteFunc */
|
|
toggle_segment_cleanup_func, /* cleanupFunc */
|
|
toggle_segment_line_change_func, /* lineChangeFunc */
|
|
_gtk_toggle_segment_check_func /* checkFunc */
|
|
};
|
|
|
|
/*
|
|
* Type record for segments marking the end of a tagged
|
|
* range:
|
|
*/
|
|
|
|
GtkTextLineSegmentClass gtk_text_toggle_off_type = {
|
|
"toggleOff", /* name */
|
|
1, /* leftGravity */
|
|
NULL, /* splitFunc */
|
|
toggle_segment_delete_func, /* deleteFunc */
|
|
toggle_segment_cleanup_func, /* cleanupFunc */
|
|
toggle_segment_line_change_func, /* lineChangeFunc */
|
|
_gtk_toggle_segment_check_func /* checkFunc */
|
|
};
|