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Introduce gtk_render_insertion_cursor

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The new function provides an API that takes the PangoLayout and index
as input params, this way it handles strong and weak cursors internally
factoring out all code duplicated in the widgets that need to render
cursors.

https://bugzilla.gnome.org/show_bug.cgi?id=640317
This commit is contained in:
Paolo Borelli 2011-11-27 16:38:04 +01:00
parent 3c6842222a
commit 2ef5844bac
8 changed files with 207 additions and 249 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
docs/reference/gtk/gtk3-sections.txt
View File

@ -5738,6 +5738,7 @@ gtk_render_slider
gtk_render_activity
gtk_render_icon_pixbuf
gtk_render_icon
gtk_render_insertion_cursor
<SUBSECTION Standard>
GTK_TYPE_STYLE_CONTEXT

1
gtk/gtk.symbols
View File

@ -2274,6 +2274,7 @@ gtk_render_frame_gap
gtk_render_handle
gtk_render_icon
gtk_render_icon_pixbuf
gtk_render_insertion_cursor
gtk_render_layout
gtk_render_line
gtk_render_option

69
gtk/gtkentry.c
View File

@ -5848,29 +5848,20 @@ gtk_entry_draw_cursor (GtkEntry *entry,
{
GtkEntryPrivate *priv = entry->priv;
GtkWidget *widget = GTK_WIDGET (entry);
GdkKeymap *keymap = gdk_keymap_get_for_display (gtk_widget_get_display (widget));
PangoDirection keymap_direction = gdk_keymap_get_direction (keymap);
GdkRectangle cursor_location;
gboolean split_cursor;
GtkStyleContext *context;
PangoRectangle cursor_rect;
GtkBorder inner_border;
gint xoffset;
gint text_area_height;
gint cursor_index;
gboolean block;
gboolean block_at_line_end;
PangoLayout *layout;
const char *text;
_gtk_entry_effective_inner_border (entry, &inner_border);
xoffset = inner_border.left - priv->scroll_offset;
text_area_height = gdk_window_get_height (priv->text_area);
context = gtk_widget_get_style_context (widget);
layout = gtk_entry_ensure_layout (entry, TRUE);
text = pango_layout_get_text (layout);
cursor_index = g_utf8_offset_to_pointer (text, priv->current_pos + priv->preedit_cursor) - text;
if (!priv->overwrite_mode)
block = FALSE;
else
@ -5879,58 +5870,16 @@ gtk_entry_draw_cursor (GtkEntry *entry,
if (!block)
{
gint strong_x, weak_x;
GtkTextDirection dir1, dir2;
gint x1 = 0;
gint x2 = 0;
GtkBorder inner_border;
gtk_entry_get_cursor_locations (entry, type, &strong_x, &weak_x);
_gtk_entry_effective_inner_border (entry, &inner_border);
g_object_get (gtk_widget_get_settings (widget),
"gtk-split-cursor", &split_cursor,
NULL);
dir1 = (priv->resolved_dir == PANGO_DIRECTION_LTR) ? GTK_TEXT_DIR_LTR : GTK_TEXT_DIR_RTL;
dir2 = GTK_TEXT_DIR_NONE;
if (split_cursor)
{
x1 = strong_x;
if (weak_x != strong_x)
{
dir2 = (priv->resolved_dir == PANGO_DIRECTION_LTR) ? GTK_TEXT_DIR_RTL : GTK_TEXT_DIR_LTR;
x2 = weak_x;
}
}
else
{
if (keymap_direction == priv->resolved_dir)
x1 = strong_x;
else
x1 = weak_x;
}
cursor_location.x = xoffset + x1;
cursor_location.y = inner_border.top;
cursor_location.width = 0;
cursor_location.height = text_area_height - inner_border.top - inner_border.bottom;
gtk_draw_insertion_cursor (widget, cr,
&cursor_location, TRUE, dir1,
dir2 != GTK_TEXT_DIR_NONE);
if (dir2 != GTK_TEXT_DIR_NONE)
{
cursor_location.x = xoffset + x2;
gtk_draw_insertion_cursor (widget, cr,
&cursor_location, FALSE, dir2,
TRUE);
}
gtk_render_insertion_cursor (context, cr,
inner_border.left - priv->scroll_offset, inner_border.top,
layout, cursor_index, priv->resolved_dir);
}
else /* overwrite_mode */
{
GtkStyleContext *context;
GdkRGBA cursor_color;
GdkRectangle rect;
gint x, y;
@ -5944,8 +5893,6 @@ gtk_entry_draw_cursor (GtkEntry *entry,
rect.width = PANGO_PIXELS (cursor_rect.width);
rect.height = PANGO_PIXELS (cursor_rect.height);
context = gtk_widget_get_style_context (widget);
_gtk_style_context_get_cursor_color (context, &cursor_color, NULL);
gdk_cairo_set_source_rgba (cr, &cursor_color);
gdk_cairo_rectangle (cr, &rect);

92
gtk/gtklabel.c
View File

@ -3978,84 +3978,6 @@ get_cursor_direction (GtkLabel *label)
return PANGO_DIRECTION_LTR;
}
static void
gtk_label_draw_cursor (GtkLabel *label, cairo_t *cr, gint xoffset, gint yoffset)
{
GtkLabelPrivate *priv = label->priv;
GtkWidget *widget;
if (priv->select_info == NULL)
return;
widget = GTK_WIDGET (label);
if (gtk_widget_is_drawable (widget))
{
PangoDirection keymap_direction;
PangoDirection cursor_direction;
PangoRectangle strong_pos, weak_pos;
GtkTextDirection dir1, dir2;
gboolean split_cursor;
PangoRectangle *cursor1 = NULL;
PangoRectangle *cursor2 = NULL;
GdkRectangle cursor_location;
keymap_direction = gdk_keymap_get_direction (gdk_keymap_get_for_display (gtk_widget_get_display (widget)));
cursor_direction = get_cursor_direction (label);
gtk_label_ensure_layout (label);
pango_layout_get_cursor_pos (priv->layout, priv->select_info->selection_end,
&strong_pos, &weak_pos);
g_object_get (gtk_widget_get_settings (widget),
"gtk-split-cursor", &split_cursor,
NULL);
dir1 = (cursor_direction == PANGO_DIRECTION_LTR) ? GTK_TEXT_DIR_LTR : GTK_TEXT_DIR_RTL;
dir2 = GTK_TEXT_DIR_NONE;
if (split_cursor)
{
cursor1 = &strong_pos;
if (strong_pos.x != weak_pos.x || strong_pos.y != weak_pos.y)
{
dir2 = (cursor_direction == PANGO_DIRECTION_LTR) ? GTK_TEXT_DIR_RTL : GTK_TEXT_DIR_LTR;
cursor2 = &weak_pos;
}
}
else
{
if (keymap_direction == cursor_direction)
cursor1 = &strong_pos;
else
cursor1 = &weak_pos;
}
cursor_location.x = xoffset + PANGO_PIXELS (cursor1->x);
cursor_location.y = yoffset + PANGO_PIXELS (cursor1->y);
cursor_location.width = 0;
cursor_location.height = PANGO_PIXELS (cursor1->height);
gtk_draw_insertion_cursor (widget, cr,
&cursor_location, TRUE, dir1,
dir2 != GTK_TEXT_DIR_NONE);
if (dir2 != GTK_TEXT_DIR_NONE)
{
cursor_location.x = xoffset + PANGO_PIXELS (cursor2->x);
cursor_location.y = yoffset + PANGO_PIXELS (cursor2->y);
cursor_location.width = 0;
cursor_location.height = PANGO_PIXELS (cursor2->height);
gtk_draw_insertion_cursor (widget, cr,
&cursor_location, FALSE, dir2,
TRUE);
}
}
}
static GtkLabelLink *
gtk_label_get_focus_link (GtkLabel *label)
{
@ -4167,8 +4089,18 @@ gtk_label_draw (GtkWidget *widget,
GdkColor *link_color;
GdkColor *visited_link_color;
if (info->selectable && gtk_widget_has_focus (widget))
gtk_label_draw_cursor (label, cr, x, y);
if (info->selectable &&
gtk_widget_has_focus (widget) &&
gtk_widget_is_drawable (widget))
{
PangoDirection cursor_direction;
cursor_direction = get_cursor_direction (label);
gtk_render_insertion_cursor (context, cr,
x, y,
priv->layout, priv->select_info->selection_end,
cursor_direction);
}
focus_link = gtk_label_get_focus_link (label);
active_link = info->active_link;

222
gtk/gtkstylecontext.c
View File

@ -4350,6 +4350,168 @@ gtk_render_icon (GtkStyleContext *context,
cairo_restore (cr);
}
static void
draw_insertion_cursor (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
gdouble height,
gboolean is_primary,
PangoDirection direction,
gboolean draw_arrow)
{
GdkRGBA primary_color;
GdkRGBA secondary_color;
gfloat cursor_aspect_ratio;
gint stem_width;
gint offset;
cairo_save (cr);
_gtk_style_context_get_cursor_color (context, &primary_color, &secondary_color);
gdk_cairo_set_source_rgba (cr, is_primary ? &primary_color : &secondary_color);
/* When changing the shape or size of the cursor here,
* propagate the changes to gtktextview.c:text_window_invalidate_cursors().
*/
gtk_style_context_get_style (context,
"cursor-aspect-ratio", &cursor_aspect_ratio,
NULL);
stem_width = height * cursor_aspect_ratio + 1;
/* put (stem_width % 2) on the proper side of the cursor */
if (direction == PANGO_DIRECTION_LTR)
offset = stem_width / 2;
else
offset = stem_width - stem_width / 2;
cairo_rectangle (cr, x - offset, y, stem_width, height);
cairo_fill (cr);
if (draw_arrow)
{
gint arrow_width;
gint ax, ay;
arrow_width = stem_width + 1;
if (direction == PANGO_DIRECTION_RTL)
{
ax = x - offset - 1;
ay = y + height - arrow_width * 2 - arrow_width + 1;
cairo_move_to (cr, ax, ay + 1);
cairo_line_to (cr, ax - arrow_width, ay + arrow_width);
cairo_line_to (cr, ax, ay + 2 * arrow_width);
cairo_fill (cr);
}
else if (direction == PANGO_DIRECTION_LTR)
{
ax = x + stem_width - offset;
ay = y + height - arrow_width * 2 - arrow_width + 1;
cairo_move_to (cr, ax, ay + 1);
cairo_line_to (cr, ax + arrow_width, ay + arrow_width);
cairo_line_to (cr, ax, ay + 2 * arrow_width);
cairo_fill (cr);
}
else
g_assert_not_reached();
}
cairo_restore (cr);
}
/**
* gtk_render_insertion_cursor:
* @context: a #GtkStyleContext
* @cr: a #cairo_t
* @x: X origin
* @y: Y origin
* @layout: the #PangoLayout of the text
* @index: the index in the #PangoLayout
* @direction: the #PangoDirection of the text
*
* Draws a text caret on @cr at the specified index of @layout.
*
* Since: 3.4
**/
void
gtk_render_insertion_cursor (GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
PangoLayout *layout,
int index,
PangoDirection direction)
{
GtkStyleContextPrivate *priv;
gboolean split_cursor;
PangoRectangle strong_pos, weak_pos;
PangoRectangle *cursor1, *cursor2;
PangoDirection keymap_direction;
PangoDirection direction2;
g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
g_return_if_fail (cr != NULL);
g_return_if_fail (PANGO_IS_LAYOUT (layout));
g_return_if_fail (index >= 0);
priv = context->priv;
g_object_get (gtk_settings_get_for_screen (priv->screen),
"gtk-split-cursor", &split_cursor,
NULL);
keymap_direction = gdk_keymap_get_direction (gdk_keymap_get_for_display (gdk_screen_get_display (priv->screen)));
pango_layout_get_cursor_pos (layout, index, &strong_pos, &weak_pos);
direction2 = PANGO_DIRECTION_NEUTRAL;
if (split_cursor)
{
cursor1 = &strong_pos;
if (strong_pos.x != weak_pos.x || strong_pos.y != weak_pos.y)
{
direction2 = (direction == PANGO_DIRECTION_LTR) ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR;
cursor2 = &weak_pos;
}
}
else
{
if (keymap_direction == direction)
cursor1 = &strong_pos;
else
cursor1 = &weak_pos;
}
draw_insertion_cursor (context,
cr,
x + PANGO_PIXELS (cursor1->x),
y + PANGO_PIXELS (cursor1->y),
PANGO_PIXELS (cursor1->height),
TRUE,
direction,
direction2 != PANGO_DIRECTION_NEUTRAL);
if (direction2 != PANGO_DIRECTION_NEUTRAL)
{
draw_insertion_cursor (context,
cr,
x + PANGO_PIXELS (cursor2->x),
y + PANGO_PIXELS (cursor2->y),
PANGO_PIXELS (cursor2->height),
FALSE,
direction2,
TRUE);
}
}
/**
* gtk_draw_insertion_cursor:
* @widget: a #GtkWidget
@ -4374,14 +4536,7 @@ gtk_draw_insertion_cursor (GtkWidget *widget,
GtkTextDirection direction,
gboolean draw_arrow)
{
gint stem_width;
gint arrow_width;
gint x, y;
gfloat cursor_aspect_ratio;
gint offset;
GtkStyleContext *context;
GdkRGBA primary_color;
GdkRGBA secondary_color;
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (cr != NULL);
@ -4390,54 +4545,11 @@ gtk_draw_insertion_cursor (GtkWidget *widget,
context = gtk_widget_get_style_context (widget);
_gtk_style_context_get_cursor_color (context, &primary_color, &secondary_color);
gdk_cairo_set_source_rgba (cr, is_primary ? &primary_color : &secondary_color);
/* When changing the shape or size of the cursor here,
* propagate the changes to gtktextview.c:text_window_invalidate_cursors().
*/
gtk_style_context_get_style (context,
"cursor-aspect-ratio", &cursor_aspect_ratio,
NULL);
stem_width = location->height * cursor_aspect_ratio + 1;
arrow_width = stem_width + 1;
/* put (stem_width % 2) on the proper side of the cursor */
if (direction == GTK_TEXT_DIR_LTR)
offset = stem_width / 2;
else
offset = stem_width - stem_width / 2;
cairo_rectangle (cr,
location->x - offset, location->y,
stem_width, location->height);
cairo_fill (cr);
if (draw_arrow)
{
if (direction == GTK_TEXT_DIR_RTL)
{
x = location->x - offset - 1;
y = location->y + location->height - arrow_width * 2 - arrow_width + 1;
cairo_move_to (cr, x, y + 1);
cairo_line_to (cr, x - arrow_width, y + arrow_width);
cairo_line_to (cr, x, y + 2 * arrow_width);
cairo_fill (cr);
}
else if (direction == GTK_TEXT_DIR_LTR)
{
x = location->x + stem_width - offset;
y = location->y + location->height - arrow_width * 2 - arrow_width + 1;
cairo_move_to (cr, x, y + 1);
cairo_line_to (cr, x + arrow_width, y + arrow_width);
cairo_line_to (cr, x, y + 2 * arrow_width);
cairo_fill (cr);
}
}
draw_insertion_cursor (context, cr,
location->x, location->y, location->height,
is_primary,
(direction == GTK_TEXT_DIR_RTL) ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR,
draw_arrow);
}
static AtkAttributeSet *

8
gtk/gtkstylecontext.h
View File

@ -922,6 +922,14 @@ void gtk_render_icon (GtkStyleContext *context,
GdkPixbuf *pixbuf,
gdouble x,
gdouble y);
void gtk_render_insertion_cursor
(GtkStyleContext *context,
cairo_t *cr,
gdouble x,
gdouble y,
PangoLayout *layout,
int index,
PangoDirection direction);
void gtk_draw_insertion_cursor (GtkWidget *widget,
cairo_t *cr,

59
gtk/gtktextdisplay.c
View File

@ -821,6 +821,7 @@ gtk_text_layout_draw (GtkTextLayout *layout,
cairo_t *cr,
GList **widgets)
{
GtkStyleContext *context;
gint offset_y;
GtkTextRenderer *text_renderer;
GtkTextIter selection_start, selection_end;
@ -838,6 +839,8 @@ gtk_text_layout_draw (GtkTextLayout *layout,
if (!gdk_cairo_get_clip_rectangle (cr, &clip))
return;
context = gtk_widget_get_style_context (widget);
line_list = gtk_text_layout_get_lines (layout, clip.y, clip.y + clip.height, &offset_y);
if (line_list == NULL)
@ -911,59 +914,13 @@ gtk_text_layout_draw (GtkTextLayout *layout,
for (i = 0; i < line_display->cursors->len; i++)
{
int index;
PangoRectangle strong_pos, weak_pos;
PangoRectangle *cursor1, *cursor2;
gboolean split_cursor;
GtkTextDirection dir1, dir2;
GdkRectangle cursor_location;
PangoDirection dir;
index = g_array_index(line_display->cursors, int, i);
pango_layout_get_cursor_pos (line_display->layout, index, &strong_pos, &weak_pos);
dir1 = line_display->direction;
dir2 = GTK_TEXT_DIR_NONE;
g_object_get (gtk_widget_get_settings (widget),
"gtk-split-cursor", &split_cursor,
NULL);
if (split_cursor)
{
cursor1 = &strong_pos;
if (strong_pos.x != weak_pos.x || strong_pos.y != weak_pos.y)
{
dir2 = (line_display->direction == GTK_TEXT_DIR_LTR) ? GTK_TEXT_DIR_RTL : GTK_TEXT_DIR_LTR;
cursor2 = &weak_pos;
}
}
else
{
if (layout->keyboard_direction == line_display->direction)
cursor1 = &strong_pos;
else
cursor1 = &weak_pos;
}
cursor_location.x = line_display->x_offset + PANGO_PIXELS (cursor1->x);
cursor_location.y = line_display->top_margin + PANGO_PIXELS (cursor1->y);
cursor_location.width = 0;
cursor_location.height = PANGO_PIXELS (cursor1->height);
gtk_draw_insertion_cursor (widget, cr,
&cursor_location, TRUE, dir1,
dir2 != GTK_TEXT_DIR_NONE);
if (dir2 != GTK_TEXT_DIR_NONE)
{
cursor_location.x = line_display->x_offset + PANGO_PIXELS (cursor2->x);
cursor_location.y = line_display->top_margin + PANGO_PIXELS (cursor2->y);
cursor_location.width = 0;
cursor_location.height = PANGO_PIXELS (cursor2->height);
gtk_draw_insertion_cursor (widget, cr,
&cursor_location, FALSE, dir2,
TRUE);
}
dir = (line_display->direction == GTK_TEXT_DIR_RTL) ? PANGO_DIRECTION_RTL : PANGO_DIRECTION_LTR;
gtk_render_insertion_cursor (context, cr,
line_display->x_offset, line_display->top_margin,
line_display->layout, index, dir);
}
}
} /* line_display->height > 0 */

2
gtk/gtktextview.c
View File

@ -8622,7 +8622,7 @@ text_window_invalidate_cursors (GtkTextWindow *win)
gtk_text_layout_get_cursor_locations (priv->layout, &iter,
&strong, &weak);
/* cursor width calculation as in gtkstyle.c:draw_insertion_cursor(),
/* cursor width calculation as in gtkstylecontext.c:draw_insertion_cursor(),
* ignoring the text direction be exposing both sides of the cursor
*/