gtk2/gtk/gtktextutil.c

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/* 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"
Add infrastructure for copy/paste and DND of rich text for GtkTextBuffer. 2006-03-07 Michael Natterer <mitch@imendio.com> Add infrastructure for copy/paste and DND of rich text for GtkTextBuffer. Fixes bug #324177. * gtk/gtktextbufferrichtext.[ch]: new files implementing a per-buffer registry of rich text formats. * gtk/gtk.h: #include gtktextbufferrichtext.h * gtk/gtktextbufferserialize.[ch]: new files implementing an internal serialization format that can handle all of a text buffer's tags and pixbufs. It's not useful for anything except tranfer between instances of GtkTextBuffer (Anders Carlsson). * gtk/Makefile.am: build the new files. * gtk/gtkclipboard.[ch]: added convenience APIs for rich text, just as they exist for plain text and pixbufs. * gtk/gtkselection.[ch]: added rich text convenience APIs here too. Return the target list from gtk_target_list_ref(). Register GtkTargetList as boxed type. Added gtk_target_table_new_from_list() and gtk_target_table_free(), which make converting between GtkTargetList and arrays of GtkTargetEntry considerably easier. * gtk/gtktextutil.[ch]: added _gtk_text_util_create_rich_drag_icon() which creates a fancy rich text icon (Matthias Clasen). * gtk/gtktextbuffer.[ch]: use all the new stuff above and implement copy and paste of rich text. Added APIs for getting the target lists used for copy and paste. Added public enum GtkTextBufferTargetInfo which contains the "info" IDs associated with the entries of the target lists. * gtk/gtktextview.c: use the new rich text APIs and GtkTextBuffer's new target list API to enable DND of rich text chunks. * gtk/gtk.symbols: export all the new symbols added. * tests/testtext.c: added rich text testing stuff.
2006-03-07 13:46:11 +00:00
#include "gtktextview.h"
#define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
#include "gtktextdisplay.h"
#include "gtktextbuffer.h"
#include "gtkmenuitem.h"
Add infrastructure for copy/paste and DND of rich text for GtkTextBuffer. 2006-03-07 Michael Natterer <mitch@imendio.com> Add infrastructure for copy/paste and DND of rich text for GtkTextBuffer. Fixes bug #324177. * gtk/gtktextbufferrichtext.[ch]: new files implementing a per-buffer registry of rich text formats. * gtk/gtk.h: #include gtktextbufferrichtext.h * gtk/gtktextbufferserialize.[ch]: new files implementing an internal serialization format that can handle all of a text buffer's tags and pixbufs. It's not useful for anything except tranfer between instances of GtkTextBuffer (Anders Carlsson). * gtk/Makefile.am: build the new files. * gtk/gtkclipboard.[ch]: added convenience APIs for rich text, just as they exist for plain text and pixbufs. * gtk/gtkselection.[ch]: added rich text convenience APIs here too. Return the target list from gtk_target_list_ref(). Register GtkTargetList as boxed type. Added gtk_target_table_new_from_list() and gtk_target_table_free(), which make converting between GtkTargetList and arrays of GtkTargetEntry considerably easier. * gtk/gtktextutil.[ch]: added _gtk_text_util_create_rich_drag_icon() which creates a fancy rich text icon (Matthias Clasen). * gtk/gtktextbuffer.[ch]: use all the new stuff above and implement copy and paste of rich text. Added APIs for getting the target lists used for copy and paste. Added public enum GtkTextBufferTargetInfo which contains the "info" IDs associated with the entries of the target lists. * gtk/gtktextview.c: use the new rich text APIs and GtkTextBuffer's new target list API to enable DND of rich text chunks. * gtk/gtk.symbols: export all the new symbols added. * tests/testtext.c: added rich text testing stuff.
2006-03-07 13:46:11 +00:00
#include "gtkintl.h"
#include "gtkalias.h"
#define DRAG_ICON_MAX_WIDTH 250
Add infrastructure for copy/paste and DND of rich text for GtkTextBuffer. 2006-03-07 Michael Natterer <mitch@imendio.com> Add infrastructure for copy/paste and DND of rich text for GtkTextBuffer. Fixes bug #324177. * gtk/gtktextbufferrichtext.[ch]: new files implementing a per-buffer registry of rich text formats. * gtk/gtk.h: #include gtktextbufferrichtext.h * gtk/gtktextbufferserialize.[ch]: new files implementing an internal serialization format that can handle all of a text buffer's tags and pixbufs. It's not useful for anything except tranfer between instances of GtkTextBuffer (Anders Carlsson). * gtk/Makefile.am: build the new files. * gtk/gtkclipboard.[ch]: added convenience APIs for rich text, just as they exist for plain text and pixbufs. * gtk/gtkselection.[ch]: added rich text convenience APIs here too. Return the target list from gtk_target_list_ref(). Register GtkTargetList as boxed type. Added gtk_target_table_new_from_list() and gtk_target_table_free(), which make converting between GtkTargetList and arrays of GtkTargetEntry considerably easier. * gtk/gtktextutil.[ch]: added _gtk_text_util_create_rich_drag_icon() which creates a fancy rich text icon (Matthias Clasen). * gtk/gtktextbuffer.[ch]: use all the new stuff above and implement copy and paste of rich text. Added APIs for getting the target lists used for copy and paste. Added public enum GtkTextBufferTargetInfo which contains the "info" IDs associated with the entries of the target lists. * gtk/gtktextview.c: use the new rich text APIs and GtkTextBuffer's new target list API to enable DND of rich text chunks. * gtk/gtk.symbols: export all the new symbols added. * tests/testtext.c: added rich text testing stuff.
2006-03-07 13:46:11 +00:00
#define DRAG_ICON_MAX_HEIGHT 250
#define DRAG_ICON_LAYOUT_BORDER 5
#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;
};
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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), I_("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_readonly (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.
**/
Add infrastructure for copy/paste and DND of rich text for GtkTextBuffer. 2006-03-07 Michael Natterer <mitch@imendio.com> Add infrastructure for copy/paste and DND of rich text for GtkTextBuffer. Fixes bug #324177. * gtk/gtktextbufferrichtext.[ch]: new files implementing a per-buffer registry of rich text formats. * gtk/gtk.h: #include gtktextbufferrichtext.h * gtk/gtktextbufferserialize.[ch]: new files implementing an internal serialization format that can handle all of a text buffer's tags and pixbufs. It's not useful for anything except tranfer between instances of GtkTextBuffer (Anders Carlsson). * gtk/Makefile.am: build the new files. * gtk/gtkclipboard.[ch]: added convenience APIs for rich text, just as they exist for plain text and pixbufs. * gtk/gtkselection.[ch]: added rich text convenience APIs here too. Return the target list from gtk_target_list_ref(). Register GtkTargetList as boxed type. Added gtk_target_table_new_from_list() and gtk_target_table_free(), which make converting between GtkTargetList and arrays of GtkTargetEntry considerably easier. * gtk/gtktextutil.[ch]: added _gtk_text_util_create_rich_drag_icon() which creates a fancy rich text icon (Matthias Clasen). * gtk/gtktextbuffer.[ch]: use all the new stuff above and implement copy and paste of rich text. Added APIs for getting the target lists used for copy and paste. Added public enum GtkTextBufferTargetInfo which contains the "info" IDs associated with the entries of the target lists. * gtk/gtktextview.c: use the new rich text APIs and GtkTextBuffer's new target list API to enable DND of rich text chunks. * gtk/gtk.symbols: export all the new symbols added. * tests/testtext.c: added rich text testing stuff.
2006-03-07 13:46:11 +00:00
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;
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);
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;
}
Add infrastructure for copy/paste and DND of rich text for GtkTextBuffer. 2006-03-07 Michael Natterer <mitch@imendio.com> Add infrastructure for copy/paste and DND of rich text for GtkTextBuffer. Fixes bug #324177. * gtk/gtktextbufferrichtext.[ch]: new files implementing a per-buffer registry of rich text formats. * gtk/gtk.h: #include gtktextbufferrichtext.h * gtk/gtktextbufferserialize.[ch]: new files implementing an internal serialization format that can handle all of a text buffer's tags and pixbufs. It's not useful for anything except tranfer between instances of GtkTextBuffer (Anders Carlsson). * gtk/Makefile.am: build the new files. * gtk/gtkclipboard.[ch]: added convenience APIs for rich text, just as they exist for plain text and pixbufs. * gtk/gtkselection.[ch]: added rich text convenience APIs here too. Return the target list from gtk_target_list_ref(). Register GtkTargetList as boxed type. Added gtk_target_table_new_from_list() and gtk_target_table_free(), which make converting between GtkTargetList and arrays of GtkTargetEntry considerably easier. * gtk/gtktextutil.[ch]: added _gtk_text_util_create_rich_drag_icon() which creates a fancy rich text icon (Matthias Clasen). * gtk/gtktextbuffer.[ch]: use all the new stuff above and implement copy and paste of rich text. Added APIs for getting the target lists used for copy and paste. Added public enum GtkTextBufferTargetInfo which contains the "info" IDs associated with the entries of the target lists. * gtk/gtktextview.c: use the new rich text APIs and GtkTextBuffer's new target list API to enable DND of rich text chunks. * gtk/gtk.symbols: export all the new symbols added. * tests/testtext.c: added rich text testing stuff.
2006-03-07 13:46:11 +00:00
static void
gtk_text_view_set_attributes_from_style (GtkTextView *text_view,
GtkTextAttributes *values,
GtkStyle *style)
{
values->appearance.bg_color = style->base[GTK_STATE_NORMAL];
values->appearance.fg_color = style->text[GTK_STATE_NORMAL];
if (values->font)
pango_font_description_free (values->font);
values->font = pango_font_description_copy (style->font_desc);
}
GdkPixmap *
_gtk_text_util_create_rich_drag_icon (GtkWidget *widget,
GtkTextBuffer *buffer,
GtkTextIter *start,
GtkTextIter *end)
{
GdkDrawable *drawable = NULL;
gint pixmap_height, pixmap_width;
gint layout_width, layout_height;
GtkTextBuffer *new_buffer;
GtkTextLayout *layout;
GtkTextAttributes *style;
PangoContext *ltr_context, *rtl_context;
GtkTextIter iter;
g_return_val_if_fail (GTK_IS_WIDGET (widget), NULL);
g_return_val_if_fail (GTK_IS_TEXT_BUFFER (buffer), NULL);
g_return_val_if_fail (start != NULL, NULL);
g_return_val_if_fail (end != NULL, NULL);
new_buffer = gtk_text_buffer_new (gtk_text_buffer_get_tag_table (buffer));
gtk_text_buffer_get_start_iter (new_buffer, &iter);
gtk_text_buffer_insert_range (new_buffer, &iter, start, end);
gtk_text_buffer_get_start_iter (new_buffer, &iter);
layout = gtk_text_layout_new ();
ltr_context = gtk_widget_create_pango_context (widget);
pango_context_set_base_dir (ltr_context, PANGO_DIRECTION_LTR);
rtl_context = gtk_widget_create_pango_context (widget);
pango_context_set_base_dir (rtl_context, PANGO_DIRECTION_RTL);
gtk_text_layout_set_contexts (layout, ltr_context, rtl_context);
g_object_unref (ltr_context);
g_object_unref (rtl_context);
style = gtk_text_attributes_new ();
layout_width = widget->allocation.width;
if (GTK_IS_TEXT_VIEW (widget))
{
gtk_widget_ensure_style (widget);
gtk_text_view_set_attributes_from_style (GTK_TEXT_VIEW (widget),
style, widget->style);
layout_width = layout_width
- gtk_text_view_get_border_window_size (GTK_TEXT_VIEW (widget), GTK_TEXT_WINDOW_LEFT)
- gtk_text_view_get_border_window_size (GTK_TEXT_VIEW (widget), GTK_TEXT_WINDOW_RIGHT);
}
style->direction = gtk_widget_get_direction (widget);
style->wrap_mode = PANGO_WRAP_WORD_CHAR;
gtk_text_layout_set_default_style (layout, style);
gtk_text_attributes_unref (style);
gtk_text_layout_set_buffer (layout, new_buffer);
gtk_text_layout_set_cursor_visible (layout, FALSE);
gtk_text_layout_set_screen_width (layout, layout_width);
gtk_text_layout_validate (layout, DRAG_ICON_MAX_HEIGHT);
gtk_text_layout_get_size (layout, &layout_width, &layout_height);
layout_width = MIN (layout_width, DRAG_ICON_MAX_WIDTH);
layout_height = MIN (layout_height, DRAG_ICON_MAX_HEIGHT);
pixmap_width = layout_width + DRAG_ICON_LAYOUT_BORDER * 2;
pixmap_height = layout_height + 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);
gtk_text_layout_draw (layout, widget, drawable,
widget->style->text_gc [GTK_WIDGET_STATE (widget)],
- (1 + DRAG_ICON_LAYOUT_BORDER),
- (1 + DRAG_ICON_LAYOUT_BORDER),
0, 0,
pixmap_width, pixmap_height, NULL);
gdk_draw_rectangle (drawable,
widget->style->black_gc,
FALSE,
0, 0,
pixmap_width + 1,
pixmap_height + 1);
g_object_unref (layout);
g_object_unref (new_buffer);
return drawable;
}