1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
|
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* GTK - The GIMP Toolkit
* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* Modified by the GTK+ Team and others 1997-2001. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include <config.h>
#include "gtktextutil.h"
#include "gtkintl.h"
#include "gtkmenuitem.h"
#include "gtkalias.h"
#define DRAG_ICON_MAX_WIDTH 250
#define DRAG_ICON_LAYOUT_BORDER 2
#define DRAG_ICON_MAX_LINES 7
#define ELLIPSIS_CHARACTER "\xe2\x80\xa6"
typedef struct _GtkUnicodeMenuEntry GtkUnicodeMenuEntry;
typedef struct _GtkTextUtilCallbackInfo GtkTextUtilCallbackInfo;
struct _GtkUnicodeMenuEntry {
const char *label;
gunichar ch;
};
struct _GtkTextUtilCallbackInfo
{
GtkTextUtilCharChosenFunc func;
gpointer data;
};
static const GtkUnicodeMenuEntry bidi_menu_entries[] = {
{ N_("LRM _Left-to-right mark"), 0x200E },
{ N_("RLM _Right-to-left mark"), 0x200F },
{ N_("LRE Left-to-right _embedding"), 0x202A },
{ N_("RLE Right-to-left e_mbedding"), 0x202B },
{ N_("LRO Left-to-right _override"), 0x202D },
{ N_("RLO Right-to-left o_verride"), 0x202E },
{ N_("PDF _Pop directional formatting"), 0x202C },
{ N_("ZWS _Zero width space"), 0x200B },
{ N_("ZWJ Zero width _joiner"), 0x200D },
{ N_("ZWNJ Zero width _non-joiner"), 0x200C }
};
static void
activate_cb (GtkWidget *menu_item,
gpointer data)
{
GtkUnicodeMenuEntry *entry;
GtkTextUtilCallbackInfo *info = data;
char buf[7];
entry = g_object_get_data (G_OBJECT (menu_item), "gtk-unicode-menu-entry");
buf[g_unichar_to_utf8 (entry->ch, buf)] = '\0';
(* info->func) (buf, info->data);
}
/**
* _gtk_text_util_append_special_char_menuitems
* @menushell: a #GtkMenuShell
* @callback: call this when an item is chosen
* @data: data for callback
*
* Add menuitems for various bidi control characters to a menu;
* the menuitems, when selected, will call the given function
* with the chosen character.
*
* This function is private/internal in GTK 2.0, the functionality may
* become public sometime, but it probably needs more thought first.
* e.g. maybe there should be a way to just get the list of items,
* instead of requiring the menu items to be created.
**/
void
_gtk_text_util_append_special_char_menuitems (GtkMenuShell *menushell,
GtkTextUtilCharChosenFunc func,
gpointer data)
{
int i;
for (i = 0; i < G_N_ELEMENTS (bidi_menu_entries); i++)
{
GtkWidget *menuitem;
GtkTextUtilCallbackInfo *info;
/* wasteful to have a bunch of copies, but simplifies mem management */
info = g_new (GtkTextUtilCallbackInfo, 1);
info->func = func;
info->data = data;
menuitem = gtk_menu_item_new_with_mnemonic (_(bidi_menu_entries[i].label));
g_object_set_data (G_OBJECT (menuitem), "gtk-unicode-menu-entry",
(gpointer)&bidi_menu_entries[i]);
g_signal_connect_data (menuitem, "activate",
G_CALLBACK (activate_cb),
info, (GClosureNotify) g_free, 0);
gtk_widget_show (menuitem);
gtk_menu_shell_append (menushell, menuitem);
}
}
static void
append_n_lines (GString *str, const gchar *text, GSList *lines, gint n_lines)
{
PangoLayoutLine *line;
gint i;
for (i = 0; i < n_lines; i++)
{
line = lines->data;
g_string_append_len (str, &text[line->start_index], line->length);
lines = lines->next;
}
}
static void
limit_layout_lines (PangoLayout *layout)
{
const gchar *text;
GString *str;
GSList *lines, *elem;
gint n_lines;
n_lines = pango_layout_get_line_count (layout);
if (n_lines >= DRAG_ICON_MAX_LINES)
{
text = pango_layout_get_text (layout);
str = g_string_new (NULL);
lines = pango_layout_get_lines (layout);
/* get first lines */
elem = lines;
append_n_lines (str, text, elem,
DRAG_ICON_MAX_LINES / 2);
g_string_append (str, "\n" ELLIPSIS_CHARACTER "\n");
/* get last lines */
elem = g_slist_nth (lines, n_lines - DRAG_ICON_MAX_LINES / 2);
append_n_lines (str, text, elem,
DRAG_ICON_MAX_LINES / 2);
pango_layout_set_text (layout, str->str, -1);
g_string_free (str, TRUE);
}
}
/**
* _gtk_text_util_create_drag_icon
* @widget: #GtkWidget to extract the pango context
* @text: a #gchar to render the icon
* @len: length of @text, or -1 for NUL-terminated text
*
* Creates a drag and drop icon from @text.
**/
GdkPixmap*
_gtk_text_util_create_drag_icon (GtkWidget *widget,
gchar *text,
gsize len)
{
GdkDrawable *drawable = NULL;
PangoContext *context;
PangoLayout *layout;
gint pixmap_height, pixmap_width;
gint layout_width, layout_height;
gint n_lines;
g_return_val_if_fail (widget != NULL, NULL);
g_return_val_if_fail (text != NULL, NULL);
context = gtk_widget_get_pango_context (widget);
layout = pango_layout_new (context);
pango_layout_set_text (layout, text, len);
pango_layout_set_wrap (layout, PANGO_WRAP_WORD_CHAR);
pango_layout_get_size (layout, &layout_width, &layout_height);
layout_width = MIN (layout_width, DRAG_ICON_MAX_WIDTH * PANGO_SCALE);
pango_layout_set_width (layout, layout_width);
n_lines = pango_layout_get_line_count (layout);
limit_layout_lines (layout);
/* get again layout extents, they may have changed */
pango_layout_get_size (layout, &layout_width, &layout_height);
pixmap_width = layout_width / PANGO_SCALE + DRAG_ICON_LAYOUT_BORDER * 2;
pixmap_height = layout_height / PANGO_SCALE + DRAG_ICON_LAYOUT_BORDER * 2;
drawable = gdk_pixmap_new (widget->window,
pixmap_width + 2,
pixmap_height + 2,
-1);
gdk_draw_rectangle (drawable,
widget->style->base_gc [GTK_WIDGET_STATE (widget)],
TRUE,
0, 0,
pixmap_width + 1,
pixmap_height + 1);
gdk_draw_layout (drawable,
widget->style->text_gc [GTK_WIDGET_STATE (widget)],
1 + DRAG_ICON_LAYOUT_BORDER,
1 + DRAG_ICON_LAYOUT_BORDER,
layout);
gdk_draw_rectangle (drawable,
widget->style->black_gc,
FALSE,
0, 0,
pixmap_width + 1,
pixmap_height + 1);
g_object_unref (layout);
return drawable;
}
|
