summaryrefslogtreecommitdiff
path: root/gedit/gedittextregion.c
diff options
context:
space:
mode:
Diffstat (limited to 'gedit/gedittextregion.c')
-rwxr-xr-xgedit/gedittextregion.c647
1 files changed, 0 insertions, 647 deletions
diff --git a/gedit/gedittextregion.c b/gedit/gedittextregion.c
deleted file mode 100755
index f6790489..00000000
--- a/gedit/gedittextregion.c
+++ /dev/null
@@ -1,647 +0,0 @@
-/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
- *
- * gedittextregion.h - GtkTextMark based region utility functions
- *
- * This file is part of the GtkSourceView widget
- *
- * Copyright (C) 2002 Gustavo Gir�ldez <[email protected]>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-
-#include <glib.h>
-
-#include "gedittextregion.h"
-
-
-#undef ENABLE_DEBUG
-/*
-#define ENABLE_DEBUG
-*/
-
-#ifdef ENABLE_DEBUG
-#define DEBUG(x) (x)
-#else
-#define DEBUG(x)
-#endif
-
-typedef struct _Subregion {
- GtkTextMark *start;
- GtkTextMark *end;
-} Subregion;
-
-struct _GeditTextRegion {
- GtkTextBuffer *buffer;
- GList *subregions;
- guint32 time_stamp;
-};
-
-typedef struct _GeditTextRegionIteratorReal GeditTextRegionIteratorReal;
-
-struct _GeditTextRegionIteratorReal {
- GeditTextRegion *region;
- guint32 region_time_stamp;
-
- GList *subregions;
-};
-
-
-/* ----------------------------------------------------------------------
- Private interface
- ---------------------------------------------------------------------- */
-
-/* Find and return a subregion node which contains the given text
- iter. If left_side is TRUE, return the subregion which contains
- the text iter or which is the leftmost; else return the rightmost
- subregion */
-static GList *
-find_nearest_subregion (GeditTextRegion *region,
- const GtkTextIter *iter,
- GList *begin,
- gboolean leftmost,
- gboolean include_edges)
-{
- GList *l, *retval;
-
- g_return_val_if_fail (region != NULL && iter != NULL, NULL);
-
- if (!begin)
- begin = region->subregions;
-
- if (begin)
- retval = begin->prev;
- else
- retval = NULL;
-
- for (l = begin; l; l = l->next) {
- GtkTextIter sr_iter;
- Subregion *sr = l->data;
- gint cmp;
-
- if (!leftmost) {
- gtk_text_buffer_get_iter_at_mark (region->buffer, &sr_iter, sr->end);
- cmp = gtk_text_iter_compare (iter, &sr_iter);
- if (cmp < 0 || (cmp == 0 && include_edges)) {
- retval = l;
- break;
- }
-
- } else {
- gtk_text_buffer_get_iter_at_mark (region->buffer, &sr_iter, sr->start);
- cmp = gtk_text_iter_compare (iter, &sr_iter);
- if (cmp > 0 || (cmp == 0 && include_edges))
- retval = l;
- else
- break;
- }
- }
- return retval;
-}
-
-/* ----------------------------------------------------------------------
- Public interface
- ---------------------------------------------------------------------- */
-
-GeditTextRegion *
-gedit_text_region_new (GtkTextBuffer *buffer)
-{
- GeditTextRegion *region;
-
- g_return_val_if_fail (buffer != NULL, NULL);
-
- region = g_new (GeditTextRegion, 1);
- region->buffer = buffer;
- region->subregions = NULL;
- region->time_stamp = 0;
-
- return region;
-}
-
-void
-gedit_text_region_destroy (GeditTextRegion *region, gboolean delete_marks)
-{
- g_return_if_fail (region != NULL);
-
- while (region->subregions) {
- Subregion *sr = region->subregions->data;
- if (delete_marks) {
- gtk_text_buffer_delete_mark (region->buffer, sr->start);
- gtk_text_buffer_delete_mark (region->buffer, sr->end);
- }
- g_free (sr);
- region->subregions = g_list_delete_link (region->subregions,
- region->subregions);
- }
- region->buffer = NULL;
- region->time_stamp = 0;
-
- g_free (region);
-}
-
-GtkTextBuffer *
-gedit_text_region_get_buffer (GeditTextRegion *region)
-{
- g_return_val_if_fail (region != NULL, NULL);
-
- return region->buffer;
-}
-
-static void
-gedit_text_region_clear_zero_length_subregions (GeditTextRegion *region)
-{
- GtkTextIter start, end;
- GList *node;
-
- g_return_if_fail (region != NULL);
-
- for (node = region->subregions; node; ) {
- Subregion *sr = node->data;
- gtk_text_buffer_get_iter_at_mark (region->buffer, &start, sr->start);
- gtk_text_buffer_get_iter_at_mark (region->buffer, &end, sr->end);
- if (gtk_text_iter_equal (&start, &end)) {
- gtk_text_buffer_delete_mark (region->buffer, sr->start);
- gtk_text_buffer_delete_mark (region->buffer, sr->end);
- g_free (sr);
- if (node == region->subregions)
- region->subregions = node = g_list_delete_link (node, node);
- else
- node = g_list_delete_link (node, node);
-
- ++region->time_stamp;
-
- } else {
- node = node->next;
- }
- }
-}
-
-void
-gedit_text_region_add (GeditTextRegion *region,
- const GtkTextIter *_start,
- const GtkTextIter *_end)
-{
- GList *start_node, *end_node;
- GtkTextIter start, end;
-
- g_return_if_fail (region != NULL && _start != NULL && _end != NULL);
-
- start = *_start;
- end = *_end;
-
- DEBUG (g_print ("---\n"));
- DEBUG (gedit_text_region_debug_print (region));
- DEBUG (g_message ("region_add (%d, %d)",
- gtk_text_iter_get_offset (&start),
- gtk_text_iter_get_offset (&end)));
-
- gtk_text_iter_order (&start, &end);
-
- /* don't add zero-length regions */
- if (gtk_text_iter_equal (&start, &end))
- return;
-
- /* find bounding subregions */
- start_node = find_nearest_subregion (region, &start, NULL, FALSE, TRUE);
- end_node = find_nearest_subregion (region, &end, start_node, TRUE, TRUE);
-
- if (start_node == NULL || end_node == NULL || end_node == start_node->prev) {
- /* create the new subregion */
- Subregion *sr = g_new0 (Subregion, 1);
- sr->start = gtk_text_buffer_create_mark (region->buffer, NULL, &start, TRUE);
- sr->end = gtk_text_buffer_create_mark (region->buffer, NULL, &end, FALSE);
-
- if (start_node == NULL) {
- /* append the new region */
- region->subregions = g_list_append (region->subregions, sr);
-
- } else if (end_node == NULL) {
- /* prepend the new region */
- region->subregions = g_list_prepend (region->subregions, sr);
-
- } else {
- /* we are in the middle of two subregions */
- region->subregions = g_list_insert_before (region->subregions,
- start_node, sr);
- }
- }
- else {
- GtkTextIter iter;
- Subregion *sr = start_node->data;
- if (start_node != end_node) {
- /* we need to merge some subregions */
- GList *l = start_node->next;
- Subregion *q;
-
- gtk_text_buffer_delete_mark (region->buffer, sr->end);
- while (l != end_node) {
- q = l->data;
- gtk_text_buffer_delete_mark (region->buffer, q->start);
- gtk_text_buffer_delete_mark (region->buffer, q->end);
- g_free (q);
- l = g_list_delete_link (l, l);
- }
- q = l->data;
- gtk_text_buffer_delete_mark (region->buffer, q->start);
- sr->end = q->end;
- g_free (q);
- l = g_list_delete_link (l, l);
- }
- /* now move marks if that action expands the region */
- gtk_text_buffer_get_iter_at_mark (region->buffer, &iter, sr->start);
- if (gtk_text_iter_compare (&iter, &start) > 0)
- gtk_text_buffer_move_mark (region->buffer, sr->start, &start);
- gtk_text_buffer_get_iter_at_mark (region->buffer, &iter, sr->end);
- if (gtk_text_iter_compare (&iter, &end) < 0)
- gtk_text_buffer_move_mark (region->buffer, sr->end, &end);
- }
-
- ++region->time_stamp;
-
- DEBUG (gedit_text_region_debug_print (region));
-}
-
-void
-gedit_text_region_subtract (GeditTextRegion *region,
- const GtkTextIter *_start,
- const GtkTextIter *_end)
-{
- GList *start_node, *end_node, *node;
- GtkTextIter sr_start_iter, sr_end_iter;
- gboolean done;
- gboolean start_is_outside, end_is_outside;
- Subregion *sr;
- GtkTextIter start, end;
-
- g_return_if_fail (region != NULL && _start != NULL && _end != NULL);
-
- start = *_start;
- end = *_end;
-
- DEBUG (g_print ("---\n"));
- DEBUG (gedit_text_region_debug_print (region));
- DEBUG (g_message ("region_substract (%d, %d)",
- gtk_text_iter_get_offset (&start),
- gtk_text_iter_get_offset (&end)));
-
- gtk_text_iter_order (&start, &end);
-
- /* find bounding subregions */
- start_node = find_nearest_subregion (region, &start, NULL, FALSE, FALSE);
- end_node = find_nearest_subregion (region, &end, start_node, TRUE, FALSE);
-
- /* easy case first */
- if (start_node == NULL || end_node == NULL || end_node == start_node->prev)
- return;
-
- /* deal with the start point */
- start_is_outside = end_is_outside = FALSE;
-
- sr = start_node->data;
- gtk_text_buffer_get_iter_at_mark (region->buffer, &sr_start_iter, sr->start);
- gtk_text_buffer_get_iter_at_mark (region->buffer, &sr_end_iter, sr->end);
-
- if (gtk_text_iter_in_range (&start, &sr_start_iter, &sr_end_iter) &&
- !gtk_text_iter_equal (&start, &sr_start_iter)) {
- /* the starting point is inside the first subregion */
- if (gtk_text_iter_in_range (&end, &sr_start_iter, &sr_end_iter) &&
- !gtk_text_iter_equal (&end, &sr_end_iter)) {
- /* the ending point is also inside the first
- subregion: we need to split */
- Subregion *new_sr = g_new0 (Subregion, 1);
- new_sr->end = sr->end;
- new_sr->start = gtk_text_buffer_create_mark (region->buffer,
- NULL, &end, TRUE);
- start_node = g_list_insert_before (start_node, start_node->next, new_sr);
-
- sr->end = gtk_text_buffer_create_mark (region->buffer,
- NULL, &start, FALSE);
-
- /* no further processing needed */
- DEBUG (g_message ("subregion splitted"));
-
- return;
- } else {
- /* the ending point is outside, so just move
- the end of the subregion to the starting point */
- gtk_text_buffer_move_mark (region->buffer, sr->end, &start);
- }
- } else {
- /* the starting point is outside (and so to the left)
- of the first subregion */
- DEBUG (g_message ("start is outside"));
-
- start_is_outside = TRUE;
- }
-
- /* deal with the end point */
- if (start_node != end_node) {
- sr = end_node->data;
- gtk_text_buffer_get_iter_at_mark (region->buffer, &sr_start_iter, sr->start);
- gtk_text_buffer_get_iter_at_mark (region->buffer, &sr_end_iter, sr->end);
- }
-
- if (gtk_text_iter_in_range (&end, &sr_start_iter, &sr_end_iter) &&
- !gtk_text_iter_equal (&end, &sr_end_iter)) {
- /* ending point is inside, move the start mark */
- gtk_text_buffer_move_mark (region->buffer, sr->start, &end);
- } else {
- end_is_outside = TRUE;
- DEBUG (g_message ("end is outside"));
-
- }
-
- /* finally remove any intermediate subregions */
- done = FALSE;
- node = start_node;
-
- while (!done) {
- if (node == end_node)
- /* we are done, exit in the next iteration */
- done = TRUE;
-
- if ((node == start_node && !start_is_outside) ||
- (node == end_node && !end_is_outside)) {
- /* skip starting or ending node */
- node = node->next;
- } else {
- GList *l = node->next;
- sr = node->data;
- gtk_text_buffer_delete_mark (region->buffer, sr->start);
- gtk_text_buffer_delete_mark (region->buffer, sr->end);
- g_free (sr);
- region->subregions = g_list_delete_link (region->subregions,
- node);
- node = l;
- }
- }
-
- ++region->time_stamp;
-
- DEBUG (gedit_text_region_debug_print (region));
-
- /* now get rid of empty subregions */
- gedit_text_region_clear_zero_length_subregions (region);
-
- DEBUG (gedit_text_region_debug_print (region));
-}
-
-gint
-gedit_text_region_subregions (GeditTextRegion *region)
-{
- g_return_val_if_fail (region != NULL, 0);
-
- return g_list_length (region->subregions);
-}
-
-gboolean
-gedit_text_region_nth_subregion (GeditTextRegion *region,
- guint subregion,
- GtkTextIter *start,
- GtkTextIter *end)
-{
- Subregion *sr;
-
- g_return_val_if_fail (region != NULL, FALSE);
-
- sr = g_list_nth_data (region->subregions, subregion);
- if (sr == NULL)
- return FALSE;
-
- if (start)
- gtk_text_buffer_get_iter_at_mark (region->buffer, start, sr->start);
- if (end)
- gtk_text_buffer_get_iter_at_mark (region->buffer, end, sr->end);
-
- return TRUE;
-}
-
-GeditTextRegion *
-gedit_text_region_intersect (GeditTextRegion *region,
- const GtkTextIter *_start,
- const GtkTextIter *_end)
-{
- GList *start_node, *end_node, *node;
- GtkTextIter sr_start_iter, sr_end_iter;
- Subregion *sr, *new_sr;
- gboolean done;
- GeditTextRegion *new_region;
- GtkTextIter start, end;
-
- g_return_val_if_fail (region != NULL && _start != NULL && _end != NULL, NULL);
-
- start = *_start;
- end = *_end;
-
- gtk_text_iter_order (&start, &end);
-
- /* find bounding subregions */
- start_node = find_nearest_subregion (region, &start, NULL, FALSE, FALSE);
- end_node = find_nearest_subregion (region, &end, start_node, TRUE, FALSE);
-
- /* easy case first */
- if (start_node == NULL || end_node == NULL || end_node == start_node->prev)
- return NULL;
-
- new_region = gedit_text_region_new (region->buffer);
- done = FALSE;
-
- sr = start_node->data;
- gtk_text_buffer_get_iter_at_mark (region->buffer, &sr_start_iter, sr->start);
- gtk_text_buffer_get_iter_at_mark (region->buffer, &sr_end_iter, sr->end);
-
- /* starting node */
- if (gtk_text_iter_in_range (&start, &sr_start_iter, &sr_end_iter)) {
- new_sr = g_new0 (Subregion, 1);
- new_region->subregions = g_list_prepend (new_region->subregions, new_sr);
-
- new_sr->start = gtk_text_buffer_create_mark (new_region->buffer, NULL,
- &start, TRUE);
- if (start_node == end_node) {
- /* things will finish shortly */
- done = TRUE;
- if (gtk_text_iter_in_range (&end, &sr_start_iter, &sr_end_iter))
- new_sr->end = gtk_text_buffer_create_mark (new_region->buffer,
- NULL, &end, FALSE);
- else
- new_sr->end = gtk_text_buffer_create_mark (new_region->buffer,
- NULL, &sr_end_iter,
- FALSE);
- } else {
- new_sr->end = gtk_text_buffer_create_mark (new_region->buffer, NULL,
- &sr_end_iter, FALSE);
- }
- node = start_node->next;
- } else {
- /* start should be the same as the subregion, so copy it in the loop */
- node = start_node;
- }
-
- if (!done) {
- while (node != end_node) {
- /* copy intermediate subregions verbatim */
- sr = node->data;
- gtk_text_buffer_get_iter_at_mark (region->buffer, &sr_start_iter,
- sr->start);
- gtk_text_buffer_get_iter_at_mark (region->buffer, &sr_end_iter, sr->end);
-
- new_sr = g_new0 (Subregion, 1);
- new_region->subregions = g_list_prepend (new_region->subregions, new_sr);
- new_sr->start = gtk_text_buffer_create_mark (new_region->buffer, NULL,
- &sr_start_iter, TRUE);
- new_sr->end = gtk_text_buffer_create_mark (new_region->buffer, NULL,
- &sr_end_iter, FALSE);
- /* next node */
- node = node->next;
- }
-
- /* ending node */
- sr = node->data;
- gtk_text_buffer_get_iter_at_mark (region->buffer, &sr_start_iter, sr->start);
- gtk_text_buffer_get_iter_at_mark (region->buffer, &sr_end_iter, sr->end);
-
- new_sr = g_new0 (Subregion, 1);
- new_region->subregions = g_list_prepend (new_region->subregions, new_sr);
-
- new_sr->start = gtk_text_buffer_create_mark (new_region->buffer, NULL,
- &sr_start_iter, TRUE);
-
- if (gtk_text_iter_in_range (&end, &sr_start_iter, &sr_end_iter))
- new_sr->end = gtk_text_buffer_create_mark (new_region->buffer, NULL,
- &end, FALSE);
- else
- new_sr->end = gtk_text_buffer_create_mark (new_region->buffer, NULL,
- &sr_end_iter, FALSE);
- }
-
- new_region->subregions = g_list_reverse (new_region->subregions);
- return new_region;
-}
-
-static gboolean
-check_iterator (GeditTextRegionIteratorReal *real)
-{
- if ((real->region == NULL) ||
- (real->region_time_stamp != real->region->time_stamp))
- {
- g_warning("Invalid iterator: either the iterator "
- "is uninitialized, or the region "
- "has been modified since the iterator "
- "was created.");
-
- return FALSE;
- }
-
- return TRUE;
-}
-
-void
-gedit_text_region_get_iterator (GeditTextRegion *region,
- GeditTextRegionIterator *iter,
- guint start)
-{
- GeditTextRegionIteratorReal *real;
-
- g_return_if_fail (region != NULL);
- g_return_if_fail (iter != NULL);
-
- real = (GeditTextRegionIteratorReal *)iter;
-
- /* region->subregions may be NULL, -> end iter */
-
- real->region = region;
- real->subregions = g_list_nth (region->subregions, start);
- real->region_time_stamp = region->time_stamp;
-}
-
-gboolean
-gedit_text_region_iterator_is_end (GeditTextRegionIterator *iter)
-{
- GeditTextRegionIteratorReal *real;
-
- g_return_val_if_fail (iter != NULL, FALSE);
-
- real = (GeditTextRegionIteratorReal *)iter;
- g_return_val_if_fail (check_iterator (real), FALSE);
-
- return (real->subregions == NULL);
-}
-
-gboolean
-gedit_text_region_iterator_next (GeditTextRegionIterator *iter)
-{
- GeditTextRegionIteratorReal *real;
-
- g_return_val_if_fail (iter != NULL, FALSE);
-
- real = (GeditTextRegionIteratorReal *)iter;
- g_return_val_if_fail (check_iterator (real), FALSE);
-
- if (real->subregions != NULL) {
- real->subregions = g_list_next (real->subregions);
- return TRUE;
- }
- else
- return FALSE;
-}
-
-void
-gedit_text_region_iterator_get_subregion (GeditTextRegionIterator *iter,
- GtkTextIter *start,
- GtkTextIter *end)
-{
- GeditTextRegionIteratorReal *real;
- Subregion *sr;
-
- g_return_if_fail (iter != NULL);
-
- real = (GeditTextRegionIteratorReal *)iter;
- g_return_if_fail (check_iterator (real));
- g_return_if_fail (real->subregions != NULL);
-
- sr = (Subregion*)real->subregions->data;
- g_return_if_fail (sr != NULL);
-
- if (start)
- gtk_text_buffer_get_iter_at_mark (real->region->buffer, start, sr->start);
- if (end)
- gtk_text_buffer_get_iter_at_mark (real->region->buffer, end, sr->end);
-}
-
-void
-gedit_text_region_debug_print (GeditTextRegion *region)
-{
- GList *l;
-
- g_return_if_fail (region != NULL);
-
- g_print ("Subregions: ");
- l = region->subregions;
- while (l) {
- Subregion *sr = l->data;
- GtkTextIter iter1, iter2;
- gtk_text_buffer_get_iter_at_mark (region->buffer, &iter1, sr->start);
- gtk_text_buffer_get_iter_at_mark (region->buffer, &iter2, sr->end);
- g_print ("%d-%d ", gtk_text_iter_get_offset (&iter1),
- gtk_text_iter_get_offset (&iter2));
- l = l->next;
- }
- g_print ("\n");
-}
-
generated by cgit v1.2.1 (git 2.18.0) at 2024-11-02 23:46:01 +0000