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Allow a theme to specify ellipsize width for a title
It's nice to indicate when a title is truncated with an ellipsis. Because themes may draw a title multiple times to draw a shadow, or may include the window icon within the title area, we can't determine the proper ellipsization width automatically, so add an optional attribute to the <title/> element "ellipsize_width" which, if set, is the width to ellipsize at. This is only enabled if a theme version of 3.1 is required. When it's not set, we keep the old behavior of just letting the title be clipped with a hard edge. https://bugzilla.gnome.org/show_bug.cgi?id=591842
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@ -32,6 +32,10 @@ Additional predefined variables are added for positioning expressions:
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frame_y_center: the Y center of the entire frame, with respect to the
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piece currently being drawn.
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The <title/> element now supports an "ellipsize_width" attribute. When
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specified, this gives a width at which to ellipsize the title. If not
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specified, the title will simply be clipped to the title area.
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New Features in Theme Format Version 3
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======================================
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@ -501,6 +501,7 @@ meta_frames_ensure_layout (MetaFrames *frames,
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frame->layout = gtk_widget_create_pango_layout (widget, frame->title);
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pango_layout_set_ellipsize (frame->layout, PANGO_ELLIPSIZE_END);
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pango_layout_set_auto_dir (frame->layout, FALSE);
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font_desc = meta_gtk_widget_get_font_desc (widget, scale,
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@ -2584,12 +2584,14 @@ parse_draw_op_element (GMarkupParseContext *context,
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const char *color;
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const char *x;
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const char *y;
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const char *ellipsize_width;
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MetaColorSpec *color_spec;
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if (!locate_attributes (context, element_name, attribute_names, attribute_values,
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error,
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"!color", &color,
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"!x", &x, "!y", &y,
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"ellipsize_width", &ellipsize_width,
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NULL))
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return;
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@ -2599,8 +2601,18 @@ parse_draw_op_element (GMarkupParseContext *context,
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if (!check_expression (y, FALSE, info->theme, context, error))
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return;
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if (!check_expression (ellipsize_width, FALSE, info->theme, context, error))
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return;
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#endif
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if (ellipsize_width && peek_required_version (info) < 3001)
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{
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set_error (error, context, G_MARKUP_ERROR, G_MARKUP_ERROR_PARSE,
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ATTRIBUTE_NOT_FOUND, "ellipsize_width", element_name);
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return;
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}
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/* Check last so we don't have to free it when other
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* stuff fails
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*/
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@ -2617,6 +2629,8 @@ parse_draw_op_element (GMarkupParseContext *context,
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op->data.title.x = meta_draw_spec_new (info->theme, x, NULL);
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op->data.title.y = meta_draw_spec_new (info->theme, y, NULL);
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if (ellipsize_width)
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op->data.title.ellipsize_width = meta_draw_spec_new (info->theme, ellipsize_width, NULL);
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g_assert (info->op_list);
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@ -2884,6 +2884,8 @@ meta_draw_op_free (MetaDrawOp *op)
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meta_draw_spec_free (op->data.title.x);
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meta_draw_spec_free (op->data.title.y);
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if (op->data.title.ellipsize_width)
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meta_draw_spec_free (op->data.title.ellipsize_width);
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break;
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case META_DRAW_OP_LIST:
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@ -3756,6 +3758,7 @@ meta_draw_op_draw_with_env (const MetaDrawOp *op,
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if (info->title_layout)
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{
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int rx, ry;
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PangoRectangle ink_rect, logical_rect;
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gc = get_gc_for_primitive (widget, drawable,
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op->data.title.color_spec,
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@ -3764,10 +3767,47 @@ meta_draw_op_draw_with_env (const MetaDrawOp *op,
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rx = parse_x_position_unchecked (op->data.title.x, env);
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ry = parse_y_position_unchecked (op->data.title.y, env);
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if (op->data.title.ellipsize_width)
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{
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int ellipsize_width;
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int right_bearing;
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ellipsize_width = parse_x_position_unchecked (op->data.title.ellipsize_width, env);
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/* HACK: parse_x_position_unchecked adds in env->rect.x, subtract out again */
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ellipsize_width -= env->rect.x;
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pango_layout_set_width (info->title_layout, -1);
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pango_layout_get_pixel_extents (info->title_layout,
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&ink_rect, &logical_rect);
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/* Pango's idea of ellipsization is with respect to the logical rect.
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* correct for this, by reducing the ellipsization width by the overflow
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* of the un-ellipsized text on the right... it's always the visual
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* right we want regardless of bidi, since since the X we pass in to
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* gdk_draw_layout() is always the left edge of the line.
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*/
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right_bearing = (ink_rect.x + ink_rect.width) - (logical_rect.x + logical_rect.width);
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right_bearing = MAX (right_bearing, 0);
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ellipsize_width -= right_bearing;
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ellipsize_width = MAX (ellipsize_width, 0);
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/* Only ellipsizing when necessary is a performance optimization -
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* pango_layout_set_width() will force a relayout if it isn't the
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* same as the current width of -1.
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*/
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if (ellipsize_width < logical_rect.width)
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pango_layout_set_width (info->title_layout, PANGO_SCALE * ellipsize_width);
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}
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gdk_draw_layout (drawable, gc,
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rx, ry,
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info->title_layout);
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/* Remove any ellipsization we might have set; will short-circuit
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* if the width is already -1 */
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pango_layout_set_width (info->title_layout, -1);
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g_object_unref (G_OBJECT (gc));
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}
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break;
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@ -4326,7 +4366,7 @@ meta_frame_style_draw_with_style (MetaFrameStyle *style,
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GdkRectangle bottom_titlebar_edge;
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GdkRectangle top_titlebar_edge;
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GdkRectangle left_edge, right_edge, bottom_edge;
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PangoRectangle extents;
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PangoRectangle logical_rect;
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MetaDrawInfo draw_info;
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g_return_if_fail (style_gtk->colormap == gdk_drawable_get_colormap (drawable));
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@ -4373,13 +4413,13 @@ meta_frame_style_draw_with_style (MetaFrameStyle *style,
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if (title_layout)
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pango_layout_get_pixel_extents (title_layout,
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NULL, &extents);
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NULL, &logical_rect);
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draw_info.mini_icon = mini_icon;
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draw_info.icon = icon;
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draw_info.title_layout = title_layout;
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draw_info.title_layout_width = title_layout ? extents.width : 0;
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draw_info.title_layout_height = title_layout ? extents.height : 0;
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draw_info.title_layout_width = title_layout ? logical_rect.width : 0;
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draw_info.title_layout_height = title_layout ? logical_rect.height : 0;
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draw_info.fgeom = fgeom;
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/* The enum is in the order the pieces should be rendered. */
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@ -534,6 +534,7 @@ struct _MetaDrawOp
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MetaColorSpec *color_spec;
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MetaDrawSpec *x;
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MetaDrawSpec *y;
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MetaDrawSpec *ellipsize_width;
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} title;
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struct {
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