[gtk/deprecate-render: 40/54] Use the new caret rendering api

[Matthias Clasen <matthiasc src gnome org>]

commit 395153294085657459b39afef75c211f039db389
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Oct 8 16:36:20 2022 -0400

    Use the new caret rendering api
    
    Implement the deprecated gtk_snapshot_render api
    for carets with the new one.

 gtk/deprecated/gtkrender.c | 242 ++-------------------------------------------
 1 file changed, 6 insertions(+), 236 deletions(-)
---
diff --git a/gtk/deprecated/gtkrender.c b/gtk/deprecated/gtkrender.c
index 3c9012ec49..56242cf15d 100644
--- a/gtk/deprecated/gtkrender.c
+++ b/gtk/deprecated/gtkrender.c
@@ -680,171 +680,6 @@ gtk_snapshot_render_layout (GtkSnapshot     *snapshot,
   gtk_css_style_snapshot_layout (&boxes, snapshot, x, y, layout);
 }
 
-static void
-draw_insertion_cursor (GtkStyleContext *context,
-                       cairo_t         *cr,
-                       double           x,
-                       double           y,
-                       double           width,
-                       double           height,
-                       double           aspect_ratio,
-                       gboolean         is_primary,
-                       PangoDirection   direction,
-                       gboolean         draw_arrow)
-{
-  GdkRGBA primary_color;
-  GdkRGBA secondary_color;
-  int stem_width;
-  double angle;
-  double dx, dy;
-  double xx1, yy1, xx2, yy2;
-
-  cairo_save (cr);
-  cairo_new_path (cr);
-
-  _gtk_style_context_get_cursor_color (context, &primary_color, &secondary_color);
-  gdk_cairo_set_source_rgba (cr, is_primary ? &primary_color : &secondary_color);
-
-  stem_width = height * aspect_ratio + 1;
-
-  yy1 = y;
-  yy2 = y + height;
-
-  if (width < 0)
-    {
-      xx1 = x;
-      xx2 = x - width;
-    }
-  else
-    {
-      xx1 = x + width;
-      xx2 = x;
-    }
-
-  angle = atan2 (height, width);
-
-  dx = (stem_width/2.0) * cos (M_PI/2 - angle);
-  dy = (stem_width/2.0) * sin (M_PI/2 - angle);
-
-  if (draw_arrow)
-    {
-      if (direction == PANGO_DIRECTION_RTL)
-        {
-          double x0, y0, x1, y1, x2, y2;
-
-          x0 = xx2 - dx + 2 * dy;
-          y0 = yy2 - dy - 2 * dx;
-
-          x1 = x0 + 4 * dy;
-          y1 = y0 - 4 * dx;
-          x2 = x0 + 2 * dy - 3 * dx;
-          y2 = y0 - 2 * dx - 3 * dy;
-
-          cairo_move_to (cr, xx1 + dx, yy1 + dy);
-          cairo_line_to (cr, xx2 + dx, yy2 + dy);
-          cairo_line_to (cr, x2, y2);
-          cairo_line_to (cr, x1, y1);
-          cairo_line_to (cr, xx1 - dx, yy1 - dy);
-        }
-      else if (direction == PANGO_DIRECTION_LTR)
-        {
-          double x0, y0, x1, y1, x2, y2;
-
-          x0 = xx2 + dx + 2 * dy;
-          y0 = yy2 + dy - 2 * dx;
-
-          x1 = x0 + 4 * dy;
-          y1 = y0 - 4 * dx;
-          x2 = x0 + 2 * dy + 3 * dx;
-          y2 = y0 - 2 * dx + 3 * dy;
-
-          cairo_move_to (cr, xx1 - dx, yy1 - dy);
-          cairo_line_to (cr, xx2 - dx, yy2 - dy);
-          cairo_line_to (cr, x2, y2);
-          cairo_line_to (cr, x1, y1);
-          cairo_line_to (cr, xx1 + dx, yy1 + dy);
-        }
-      else
-        g_assert_not_reached();
-    }
-  else
-    {
-      cairo_move_to (cr, xx1 + dx, yy1 + dy);
-      cairo_line_to (cr, xx2 + dx, yy2 + dy);
-      cairo_line_to (cr, xx2 - dx, yy2 - dy);
-      cairo_line_to (cr, xx1 - dx, yy1 - dy);
-    }
-
-  cairo_fill (cr);
-
-  cairo_restore (cr);
-}
-
-static void
-get_insertion_cursor_bounds (double           width,
-                             double           height,
-                             double           aspect_ratio,
-                             PangoDirection   direction,
-                             gboolean         draw_arrow,
-                             graphene_rect_t *bounds)
-{
-  int stem_width;
-
-  if (width < 0)
-    width = - width;
-
-  stem_width = height * aspect_ratio + 1;
-
-  graphene_rect_init (bounds,
-                      - 2 * stem_width, - stem_width,
-                      width + 4 * stem_width, height + 2 * stem_width);
-}
-
-static void
-snapshot_insertion_cursor (GtkSnapshot     *snapshot,
-                           GtkStyleContext *context,
-                           double           width,
-                           double           height,
-                           double           aspect_ratio,
-                           gboolean         is_primary,
-                           PangoDirection   direction,
-                           gboolean         draw_arrow)
-{
-  if (width != 0 || draw_arrow)
-    {
-      cairo_t *cr;
-      graphene_rect_t bounds;
-
-      get_insertion_cursor_bounds (width, height, aspect_ratio, direction, draw_arrow, &bounds);
-      cr = gtk_snapshot_append_cairo (snapshot, &bounds);
-
-      draw_insertion_cursor (context, cr, 0, 0, width, height, aspect_ratio, is_primary, direction, 
draw_arrow);
-
-      cairo_destroy (cr);
-    }
-  else
-    {
-      GdkRGBA primary_color;
-      GdkRGBA secondary_color;
-      int stem_width;
-      int offset;
-
-      _gtk_style_context_get_cursor_color (context, &primary_color, &secondary_color);
-
-      stem_width = height * 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;
-
-      gtk_snapshot_append_color (snapshot,
-                                 is_primary ? &primary_color : &secondary_color,
-                                 &GRAPHENE_RECT_INIT (- offset, 0, stem_width, height));
-    }
-}
-
 /**
  * gtk_snapshot_render_insertion_cursor:
  * @snapshot: snapshot to render to
@@ -868,83 +703,18 @@ gtk_snapshot_render_insertion_cursor (GtkSnapshot     *snapshot,
                                       int              index,
                                       PangoDirection   direction)
 {
+  GtkCssBoxes boxes;
   GdkDisplay *display;
-  gboolean split_cursor;
-  double aspect_ratio;
-  PangoRectangle strong_pos, weak_pos;
-  PangoRectangle *cursor1, *cursor2;
-  GdkSeat *seat;
-  PangoDirection keyboard_direction;
-  PangoDirection direction2;
 
   g_return_if_fail (snapshot != NULL);
   g_return_if_fail (GTK_IS_STYLE_CONTEXT (context));
   g_return_if_fail (PANGO_IS_LAYOUT (layout));
   g_return_if_fail (index >= 0);
 
-  display = gtk_style_context_get_display (context);
+  gtk_css_boxes_init_border_box (&boxes,
+                                 gtk_style_context_lookup_style (context),
+                                 x, y, 0, 0);
 
-  g_object_get (gtk_settings_get_for_display (display),
-                "gtk-split-cursor", &split_cursor,
-                "gtk-cursor-aspect-ratio", &aspect_ratio,
-                NULL);
-
-  keyboard_direction = PANGO_DIRECTION_LTR;
-  seat = gdk_display_get_default_seat (display);
-  if (seat)
-    {
-      GdkDevice *keyboard = gdk_seat_get_keyboard (seat);
-
-      if (keyboard)
-        keyboard_direction = gdk_device_get_direction (keyboard);
-    }
-
-  pango_layout_get_caret_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 (keyboard_direction == direction)
-        cursor1 = &strong_pos;
-      else
-        cursor1 = &weak_pos;
-    }
-
-  gtk_snapshot_save (snapshot);
-  gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (x + PANGO_PIXELS (MIN (cursor1->x, cursor1->x + 
cursor1->width)), y + PANGO_PIXELS (cursor1->y)));
-  snapshot_insertion_cursor (snapshot,
-                             context,
-                             PANGO_PIXELS (cursor1->width),
-                             PANGO_PIXELS (cursor1->height),
-                             aspect_ratio,
-                             TRUE,
-                             direction,
-                             direction2 != PANGO_DIRECTION_NEUTRAL);
-  gtk_snapshot_restore (snapshot);
-
-  if (direction2 != PANGO_DIRECTION_NEUTRAL)
-    {
-      gtk_snapshot_save (snapshot);
-      gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (x + PANGO_PIXELS (MIN (cursor2->x, cursor2->x 
+ cursor2->width)), y + PANGO_PIXELS (cursor2->y)));
-      snapshot_insertion_cursor (snapshot,
-                                 context,
-                                 PANGO_PIXELS (cursor2->width),
-                                 PANGO_PIXELS (cursor2->height),
-                                 aspect_ratio,
-                                 FALSE,
-                                 direction2,
-                                 TRUE);
-      gtk_snapshot_restore (snapshot);
-    }
+  display = gtk_style_context_get_display (context);
+  gtk_css_style_snapshot_caret (&boxes, display, snapshot, x, y, layout, index, direction);
 }