* 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.
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
-#include <config.h>
+#include "config.h"
+
+#include "gtktextview.h"
#include "gtktextutil.h"
-#include "gtkintl.h"
+
+#define GTK_TEXT_USE_INTERNAL_UNSUPPORTED_API
+
+#include "gtktextdisplay.h"
+#include "gtktextbuffer.h"
#include "gtkmenuitem.h"
+#include "gtkintl.h"
+
+#define DRAG_ICON_MAX_WIDTH 250
+#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;
{ N_("ZWNJ Zero width _non-joiner"), 0x200C }
};
+static GtkTextUtilCallbackInfo *
+callback_info_new (GtkTextUtilCharChosenFunc func,
+ gpointer data)
+{
+ GtkTextUtilCallbackInfo *info;
+
+ info = g_slice_new (GtkTextUtilCallbackInfo);
+
+ info->func = func;
+ info->data = data;
+
+ return info;
+}
+
+static void
+callback_info_free (GtkTextUtilCallbackInfo *info)
+{
+ g_slice_free (GtkTextUtilCallbackInfo, info);
+}
+
static void
activate_cb (GtkWidget *menu_item,
gpointer data)
(* info->func) (buf, info->data);
}
-/**
+/*
* _gtk_text_util_append_special_char_menuitems
* @menushell: a #GtkMenuShell
* @callback: call this when an item is chosen
* 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;
-
+ info = callback_info_new (func, data);
+
menuitem = gtk_menu_item_new_with_mnemonic (_(bidi_menu_entries[i].label));
- g_object_set_data (G_OBJECT (menuitem), "gtk-unicode-menu-entry",
+ 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);
-
+ info, (GClosureNotify) callback_info_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.
+ *
+ * Returns: a #cairo_surface_t to use as DND icon
+ */
+cairo_surface_t *
+_gtk_text_util_create_drag_icon (GtkWidget *widget,
+ gchar *text,
+ gsize len)
+{
+ GtkStyleContext *style_context;
+ GtkStateFlags state;
+ cairo_surface_t *surface;
+ PangoContext *context;
+ PangoLayout *layout;
+ cairo_t *cr;
+ gint pixmap_height, pixmap_width;
+ gint layout_width, layout_height;
+ GdkRGBA color;
+
+ 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;
+
+ style_context = gtk_widget_get_style_context (widget);
+ state = gtk_widget_get_state_flags (widget);
+
+ surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
+ CAIRO_CONTENT_COLOR,
+ pixmap_width + 2,
+ pixmap_height + 2);
+ cr = cairo_create (surface);
+
+ gtk_style_context_save (style_context);
+ gtk_style_context_add_class (style_context, GTK_STYLE_CLASS_VIEW);
+
+ gtk_style_context_get_background_color (style_context, state, &color);
+ gdk_cairo_set_source_rgba (cr, &color);
+ cairo_paint (cr);
+
+ gtk_style_context_get_color (style_context, state, &color);
+ gdk_cairo_set_source_rgba (cr, &color);
+ cairo_move_to (cr, 1 + DRAG_ICON_LAYOUT_BORDER, 1 + DRAG_ICON_LAYOUT_BORDER);
+ pango_cairo_show_layout (cr, layout);
+
+ cairo_set_source_rgb (cr, 0, 0, 0);
+ cairo_rectangle (cr, 0.5, 0.5, pixmap_width + 1, pixmap_height + 1);
+ cairo_set_line_width (cr, 1.0);
+ cairo_stroke (cr);
+
+ cairo_destroy (cr);
+ g_object_unref (layout);
+
+ cairo_surface_set_device_offset (surface, 2, 2);
+
+ gtk_style_context_restore (style_context);
+
+ return surface;
+}
+
+static void
+gtk_text_view_set_attributes_from_style (GtkTextView *text_view,
+ GtkTextAttributes *values)
+{
+ GtkStyleContext *context;
+ GdkRGBA bg_color, fg_color;
+ GtkStateFlags state;
+
+ context = gtk_widget_get_style_context (GTK_WIDGET (text_view));
+ state = gtk_widget_get_state_flags (GTK_WIDGET (text_view));
+
+ gtk_style_context_get_background_color (context, state, &bg_color);
+ gtk_style_context_get_color (context, state, &fg_color);
+
+ values->appearance.bg_color.red = CLAMP (bg_color.red * 65535. + 0.5, 0, 65535);
+ values->appearance.bg_color.green = CLAMP (bg_color.green * 65535. + 0.5, 0, 65535);
+ values->appearance.bg_color.blue = CLAMP (bg_color.blue * 65535. + 0.5, 0, 65535);
+
+ values->appearance.fg_color.red = CLAMP (fg_color.red * 65535. + 0.5, 0, 65535);
+ values->appearance.fg_color.green = CLAMP (fg_color.green * 65535. + 0.5, 0, 65535);
+ values->appearance.fg_color.blue = CLAMP (fg_color.blue * 65535. + 0.5, 0, 65535);
+
+ if (values->font)
+ pango_font_description_free (values->font);
+
+ gtk_style_context_get (context, state, "font", &values->font, NULL);
+}
+
+cairo_surface_t *
+_gtk_text_util_create_rich_drag_icon (GtkWidget *widget,
+ GtkTextBuffer *buffer,
+ GtkTextIter *start,
+ GtkTextIter *end)
+{
+ GtkAllocation allocation;
+ cairo_surface_t *surface;
+ gint pixmap_height, pixmap_width;
+ gint layout_width, layout_height;
+ GtkStyleContext *context;
+ GtkStateFlags state;
+ GdkRGBA color;
+ GtkTextBuffer *new_buffer;
+ GtkTextLayout *layout;
+ GtkTextAttributes *style;
+ PangoContext *ltr_context, *rtl_context;
+ GtkTextIter iter;
+ cairo_t *cr;
+
+ 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);
+
+ context = gtk_widget_get_style_context (widget);
+ state = gtk_widget_get_state_flags (widget);
+
+ 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 ();
+
+ gtk_widget_get_allocation (widget, &allocation);
+ layout_width = allocation.width;
+
+ if (GTK_IS_TEXT_VIEW (widget))
+ {
+ gtk_text_view_set_attributes_from_style (GTK_TEXT_VIEW (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;
+
+ surface = gdk_window_create_similar_surface (gtk_widget_get_window (widget),
+ CAIRO_CONTENT_COLOR,
+ pixmap_width + 2,
+ pixmap_height + 2);
+
+ cr = cairo_create (surface);
+
+ gtk_style_context_save (context);
+ gtk_style_context_add_class (context, GTK_STYLE_CLASS_VIEW);
+
+ gtk_style_context_get_background_color (context, state, &color);
+ gdk_cairo_set_source_rgba (cr, &color);
+ cairo_paint (cr);
+
+ cairo_save (cr);
+
+ cairo_translate (cr, 1 + DRAG_ICON_LAYOUT_BORDER, 1 + DRAG_ICON_LAYOUT_BORDER);
+ gtk_text_layout_draw (layout, widget, cr, NULL);
+
+ cairo_restore (cr);
+
+ cairo_set_source_rgb (cr, 0, 0, 0);
+ cairo_rectangle (cr, 0.5, 0.5, pixmap_width + 1, pixmap_height + 1);
+ cairo_set_line_width (cr, 1.0);
+ cairo_stroke (cr);
+
+ cairo_destroy (cr);
+ g_object_unref (layout);
+ g_object_unref (new_buffer);
+
+ cairo_surface_set_device_offset (surface, 2, 2);
+
+ gtk_style_context_restore (context);
+
+ return surface;
+}
+
+
+static gint
+layout_get_char_width (PangoLayout *layout)
+{
+ gint width;
+ PangoFontMetrics *metrics;
+ const PangoFontDescription *font_desc;
+ PangoContext *context = pango_layout_get_context (layout);
+
+ font_desc = pango_layout_get_font_description (layout);
+ if (!font_desc)
+ font_desc = pango_context_get_font_description (context);
+
+ metrics = pango_context_get_metrics (context, font_desc, NULL);
+ width = pango_font_metrics_get_approximate_char_width (metrics);
+ pango_font_metrics_unref (metrics);
+
+ return width;
+}
+
+/*
+ * _gtk_text_util_get_block_cursor_location
+ * @layout: a #PangoLayout
+ * @index: index at which cursor is located
+ * @pos: cursor location
+ * @at_line_end: whether cursor is drawn at line end, not over some
+ * character
+ *
+ * Returns: whether cursor should actually be drawn as a rectangle.
+ * It may not be the case if character at index is invisible.
+ */
+gboolean
+_gtk_text_util_get_block_cursor_location (PangoLayout *layout,
+ gint index,
+ PangoRectangle *pos,
+ gboolean *at_line_end)
+{
+ PangoRectangle strong_pos, weak_pos;
+ PangoLayoutLine *layout_line;
+ gboolean rtl;
+ gint line_no;
+ const gchar *text;
+
+ g_return_val_if_fail (layout != NULL, FALSE);
+ g_return_val_if_fail (index >= 0, FALSE);
+ g_return_val_if_fail (pos != NULL, FALSE);
+
+ pango_layout_index_to_pos (layout, index, pos);
+
+ if (pos->width != 0)
+ {
+ /* cursor is at some visible character, good */
+ if (at_line_end)
+ *at_line_end = FALSE;
+ if (pos->width < 0)
+ {
+ pos->x += pos->width;
+ pos->width = -pos->width;
+ }
+ return TRUE;
+ }
+
+ pango_layout_index_to_line_x (layout, index, FALSE, &line_no, NULL);
+ layout_line = pango_layout_get_line_readonly (layout, line_no);
+ g_return_val_if_fail (layout_line != NULL, FALSE);
+
+ text = pango_layout_get_text (layout);
+
+ if (index < layout_line->start_index + layout_line->length)
+ {
+ /* this may be a zero-width character in the middle of the line,
+ * or it could be a character where line is wrapped, we do want
+ * block cursor in latter case */
+ if (g_utf8_next_char (text + index) - text !=
+ layout_line->start_index + layout_line->length)
+ {
+ /* zero-width character in the middle of the line, do not
+ * bother with block cursor */
+ return FALSE;
+ }
+ }
+
+ /* Cursor is at the line end. It may be an empty line, or it could
+ * be on the left or on the right depending on text direction, or it
+ * even could be in the middle of visual layout in bidi text. */
+
+ pango_layout_get_cursor_pos (layout, index, &strong_pos, &weak_pos);
+
+ if (strong_pos.x != weak_pos.x)
+ {
+ /* do not show block cursor in this case, since the character typed
+ * in may or may not appear at the cursor position */
+ return FALSE;
+ }
+
+ /* In case when index points to the end of line, pos->x is always most right
+ * pixel of the layout line, so we need to correct it for RTL text. */
+ if (layout_line->length)
+ {
+ if (layout_line->resolved_dir == PANGO_DIRECTION_RTL)
+ {
+ PangoLayoutIter *iter;
+ PangoRectangle line_rect;
+ gint i;
+ gint left, right;
+ const gchar *p;
+
+ p = g_utf8_prev_char (text + index);
+
+ pango_layout_line_index_to_x (layout_line, p - text, FALSE, &left);
+ pango_layout_line_index_to_x (layout_line, p - text, TRUE, &right);
+ pos->x = MIN (left, right);
+
+ iter = pango_layout_get_iter (layout);
+ for (i = 0; i < line_no; i++)
+ pango_layout_iter_next_line (iter);
+ pango_layout_iter_get_line_extents (iter, NULL, &line_rect);
+ pango_layout_iter_free (iter);
+
+ rtl = TRUE;
+ pos->x += line_rect.x;
+ }
+ else
+ rtl = FALSE;
+ }
+ else
+ {
+ PangoContext *context = pango_layout_get_context (layout);
+ rtl = pango_context_get_base_dir (context) == PANGO_DIRECTION_RTL;
+ }
+
+ pos->width = layout_get_char_width (layout);
+
+ if (rtl)
+ pos->x -= pos->width - 1;
+
+ if (at_line_end)
+ *at_line_end = TRUE;
+
+ return pos->width != 0;
+}
projects / ~andy / gtk / blobdiff