/*
* indent.c
* This file is part of Leafpad
*
* Copyright (C) 2004 Tarot Osuji
*
* 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
*/
#include <string.h>
#include <gtk/gtk.h>
#include <gdk/gdkkeysyms.h>
#include <undo.h>
static gboolean auto_indent = FALSE;
static gint current_tab_width = 8;
void indent_set_state(gboolean state)
{
auto_indent = state;
}
gboolean indent_get_state(void)
{
return auto_indent;
}
static gchar *compute_indentation(GtkTextBuffer *buffer, gint line) /* from gedit */
{
GtkTextIter start_iter, end_iter;
gunichar ch;
gtk_text_buffer_get_iter_at_line(buffer, &start_iter, line);
end_iter = start_iter;
ch = gtk_text_iter_get_char(&end_iter);
while (g_unichar_isspace(ch) && ch != '\n') {
if (!gtk_text_iter_forward_char(&end_iter))
break;
ch = gtk_text_iter_get_char(&end_iter);
}
if (gtk_text_iter_equal(&start_iter, &end_iter))
return NULL;
return gtk_text_iter_get_text(&start_iter, &end_iter);
}
void indent_real(GtkWidget *text_view)
{
GtkTextIter iter;
gchar *ind, *str;
GtkTextBuffer *buffer = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text_view));
gtk_text_buffer_delete_selection(buffer, TRUE, TRUE);
gtk_text_buffer_get_iter_at_mark(buffer, &iter, gtk_text_buffer_get_insert(buffer));
ind = compute_indentation(buffer, gtk_text_iter_get_line(&iter));
str = g_strconcat("\n", ind, NULL);
gtk_text_buffer_insert(buffer, &iter, str, -1);
g_free(str);
g_free(ind);
gtk_text_view_scroll_mark_onscreen(
GTK_TEXT_VIEW(text_view),
gtk_text_buffer_get_insert(buffer));
}
static gint calculate_real_tab_width(GtkWidget *text_view, guint tab_size) /* from gtesourceview */
{
PangoLayout *layout;
gchar *tab_string;
gint tab_width = 0;
if (tab_size == 0)
return -1;
tab_string = g_strnfill(tab_size, 0x20);
layout = gtk_widget_create_pango_layout(text_view, tab_string);
g_free (tab_string);
if (layout != NULL) {
pango_layout_get_pixel_size(layout, &tab_width, NULL);
g_object_unref(G_OBJECT(layout));
} else
tab_width = -1;
return tab_width;
}
void indent_refresh_tab_width(GtkWidget *text_view)
{
PangoTabArray *tab_array;
tab_array = pango_tab_array_new(1, TRUE);
pango_tab_array_set_tab(tab_array, 0, PANGO_TAB_LEFT,
calculate_real_tab_width(text_view, current_tab_width));
gtk_text_view_set_tabs(GTK_TEXT_VIEW(text_view), tab_array);
pango_tab_array_free(tab_array);
}
void indent_toggle_tab_width(GtkWidget *text_view)
{
/* PangoTabArray *tab_array; */
gint width = 8;
if (current_tab_width == 8)
width = 4;
current_tab_width = width;
indent_refresh_tab_width(text_view);
/* tab_array = pango_tab_array_new(1, TRUE);
pango_tab_array_set_tab(tab_array, 0, PANGO_TAB_LEFT,
calculate_real_tab_width(text_view, width));
gtk_text_view_set_tabs(GTK_TEXT_VIEW(text_view), tab_array);
pango_tab_array_free(tab_array); */
}
void indent_multi_line_indent(GtkTextBuffer *buffer)
{
GtkTextIter start_iter, end_iter, iter;
gint start_line, end_line, i;
gboolean pos;
gtk_text_buffer_get_selection_bounds(buffer, &start_iter, &end_iter);
start_line = gtk_text_iter_get_line(&start_iter);
end_line = gtk_text_iter_get_line(&end_iter);
gtk_text_buffer_get_iter_at_mark(buffer, &iter, gtk_text_buffer_get_insert(buffer));
pos = gtk_text_iter_equal(&iter, &start_iter);
for (i = start_line; i < end_line; i++) {
gtk_text_buffer_get_iter_at_line(buffer, &iter, i);
gtk_text_buffer_place_cursor(buffer, &iter);
gtk_text_buffer_insert(buffer, &iter, "\t", 1);
undo_set_sequency(TRUE);
}
undo_set_sequency(FALSE);
gtk_text_buffer_get_iter_at_line(buffer, &start_iter, start_line);
gtk_text_buffer_get_iter_at_line(buffer, &end_iter, end_line);
if (pos) {
gtk_text_buffer_place_cursor(buffer, &end_iter);
gtk_text_buffer_move_mark_by_name(buffer, "insert", &start_iter);
} else {
gtk_text_buffer_place_cursor(buffer, &start_iter);
gtk_text_buffer_move_mark_by_name(buffer, "insert", &end_iter);
}
}
static gint compute_indent_offset_length(const gchar *ind)
{
guint8 c = *ind;
gint len = 1;
if (c == 0x20)
while ((len < current_tab_width) && (c = *++ind) == 0x20)
len++;
return len;
}
void indent_multi_line_unindent(GtkTextBuffer *buffer)
{
GtkTextIter start_iter, end_iter, iter;
gint start_line, end_line, i, len;
gboolean pos;
gchar *ind;
gtk_text_buffer_get_selection_bounds(buffer, &start_iter, &end_iter);
start_line = gtk_text_iter_get_line(&start_iter);
end_line = gtk_text_iter_get_line(&end_iter);
gtk_text_buffer_get_iter_at_mark(buffer, &iter, gtk_text_buffer_get_insert(buffer));
pos = gtk_text_iter_equal(&iter, &start_iter);
/* for (i = start_line; i < end_line; i++) { */
i = start_line;
do {
ind = compute_indentation(buffer, i);
if (ind && strlen(ind)) {
len = compute_indent_offset_length(ind);
gtk_text_buffer_get_iter_at_line(buffer, &start_iter, i);
gtk_text_buffer_place_cursor(buffer, &start_iter);
end_iter = start_iter;
gtk_text_iter_forward_chars(&end_iter, len);
gtk_text_buffer_move_mark_by_name(buffer, "insert", &end_iter);
gtk_text_buffer_delete(buffer, &start_iter, &end_iter);
undo_set_sequency(TRUE);
g_free(ind);
}
i++;
} while (i < end_line);
/* } */
undo_set_sequency(FALSE);
gtk_text_buffer_get_iter_at_line(buffer, &start_iter, start_line);
gtk_text_buffer_get_iter_at_line(buffer, &end_iter, end_line);
if (pos) {
gtk_text_buffer_place_cursor(buffer, &end_iter);
gtk_text_buffer_move_mark_by_name(buffer, "insert", &start_iter);
} else {
gtk_text_buffer_place_cursor(buffer, &start_iter);
gtk_text_buffer_move_mark_by_name(buffer, "insert", &end_iter);
}
}
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