forked from AuroraMiddleware/gtk
Implement sloped caret drawing
Prepare for Pango to return slope information for carets. While we are at it, improve the shape of our carets a bit.
This commit is contained in:
Matthias Clasen
parent
ad71f454bd
commit
f90e9b26f8
@ -972,6 +972,7 @@ draw_insertion_cursor (GtkStyleContext *context,
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cairo_t *cr,
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double x,
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double y,
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double width,
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double height,
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double aspect_ratio,
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gboolean is_primary,
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@ -981,7 +982,8 @@ draw_insertion_cursor (GtkStyleContext *context,
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GdkRGBA primary_color;
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GdkRGBA secondary_color;
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int stem_width;
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int offset;
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double angle;
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double dx, dy;
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cairo_save (cr);
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cairo_new_path (cr);
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@ -990,107 +992,104 @@ draw_insertion_cursor (GtkStyleContext *context,
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gdk_cairo_set_source_rgba (cr, is_primary ? &primary_color : &secondary_color);
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stem_width = height * aspect_ratio + 1;
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if (width < 0)
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stem_width = - stem_width;
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/* put (stem_width % 2) on the proper side of the cursor */
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if (direction == PANGO_DIRECTION_LTR)
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offset = stem_width / 2;
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else
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offset = stem_width - stem_width / 2;
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angle = atan (height / width);
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cairo_rectangle (cr, x - offset, y, stem_width, height);
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cairo_fill (cr);
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dx = (stem_width/2.0) * cos (M_PI/2 - angle);
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dy = (stem_width/2.0) * sin (M_PI/2 - angle);
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if (draw_arrow)
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{
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int arrow_width;
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int ax, ay;
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arrow_width = stem_width + 1;
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if (direction == PANGO_DIRECTION_RTL)
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{
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ax = x - offset - 1;
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ay = y + height - arrow_width * 2 - arrow_width + 1;
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double x0, y0, x1, y1, x2, y2;
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cairo_move_to (cr, ax, ay + 1);
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cairo_line_to (cr, ax - arrow_width, ay + arrow_width);
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cairo_line_to (cr, ax, ay + 2 * arrow_width);
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cairo_fill (cr);
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x0 = x - dx + 2 * dy;
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y0 = y + height - dy - 2 * dx;
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x1 = x0 + 4 * dy;
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y1 = y0 - 4 * dx;
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x2 = x0 + 2 * dy - 3 * dx;
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y2 = y0 - 2 * dx - 3 * dy;
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cairo_move_to (cr, x + width + dx, y + dy);
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cairo_line_to (cr, x + dx, y + height + dy);
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cairo_line_to (cr, x2, y2);
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cairo_line_to (cr, x1, y1);
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cairo_line_to (cr, x + width - dx, y - dy);
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}
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else if (direction == PANGO_DIRECTION_LTR)
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{
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ax = x + stem_width - offset;
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ay = y + height - arrow_width * 2 - arrow_width + 1;
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double x0, y0, x1, y1, x2, y2;
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cairo_move_to (cr, ax, ay + 1);
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cairo_line_to (cr, ax + arrow_width, ay + arrow_width);
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cairo_line_to (cr, ax, ay + 2 * arrow_width);
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cairo_fill (cr);
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x0 = x + dx + 2 * dy;
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y0 = y + height + dy - 2 * dx;
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x1 = x0 + 4 * dy;
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y1 = y0 - 4 * dx;
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x2 = x0 + 2 * dy + 3 * dx;
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y2 = y0 - 2 * dx + 3 * dy;
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cairo_move_to (cr, x + width - dx, y - dy);
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cairo_line_to (cr, x - dx, y + height - dy);
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cairo_line_to (cr, x2, y2);
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cairo_line_to (cr, x1, y1);
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cairo_line_to (cr, x + width + dx, y + dy);
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}
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else
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g_assert_not_reached();
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}
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else
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{
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cairo_move_to (cr, x + width + dx, y + dy);
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cairo_line_to (cr, x + dx, y + height + dy);
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cairo_line_to (cr, x - dx, y + height - dy);
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cairo_line_to (cr, x + width - dx, y - dy);
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}
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cairo_fill (cr);
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cairo_restore (cr);
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}
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static void
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get_insertion_cursor_bounds (double height,
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get_insertion_cursor_bounds (double width,
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double height,
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double aspect_ratio,
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PangoDirection direction,
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gboolean draw_arrow,
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graphene_rect_t *bounds)
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{
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int stem_width;
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int offset;
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stem_width = height * aspect_ratio + 1;
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if (direction == PANGO_DIRECTION_LTR)
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offset = stem_width / 2;
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else
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offset = stem_width - stem_width / 2;
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if (draw_arrow)
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{
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if (direction == PANGO_DIRECTION_LTR)
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{
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graphene_rect_init (bounds,
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- offset, 0,
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2 * stem_width + 1, height);
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}
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else
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{
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graphene_rect_init (bounds,
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- offset - stem_width - 2, 0,
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2 * stem_width + 2, height);
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}
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}
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else
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{
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graphene_rect_init (bounds,
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- offset, 0,
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stem_width, height);
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}
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graphene_rect_init (bounds,
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- 2 * stem_width, - stem_width,
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width + 4 * stem_width, height + 2 * stem_width);
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}
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static void
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snapshot_insertion_cursor (GtkSnapshot *snapshot,
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GtkStyleContext *context,
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double width,
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double height,
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double aspect_ratio,
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gboolean is_primary,
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PangoDirection direction,
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gboolean draw_arrow)
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{
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if (draw_arrow)
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if (width != 0 || draw_arrow)
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{
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cairo_t *cr;
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graphene_rect_t bounds;
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get_insertion_cursor_bounds (height, aspect_ratio, direction, draw_arrow, &bounds);
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get_insertion_cursor_bounds (width, height, aspect_ratio, direction, draw_arrow, &bounds);
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cr = gtk_snapshot_append_cairo (snapshot, &bounds);
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draw_insertion_cursor (context, cr, 0, 0, height, aspect_ratio, is_primary, direction, draw_arrow);
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draw_insertion_cursor (context, cr, 0, 0, width, height, aspect_ratio, is_primary, direction, draw_arrow);
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cairo_destroy (cr);
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}
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@ -1193,6 +1192,7 @@ gtk_snapshot_render_insertion_cursor (GtkSnapshot *snapshot,
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gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (x + PANGO_PIXELS (cursor1->x), y + PANGO_PIXELS (cursor1->y)));
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snapshot_insertion_cursor (snapshot,
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context,
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PANGO_PIXELS (cursor1->width),
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PANGO_PIXELS (cursor1->height),
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aspect_ratio,
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TRUE,
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@ -1206,6 +1206,7 @@ gtk_snapshot_render_insertion_cursor (GtkSnapshot *snapshot,
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gtk_snapshot_translate (snapshot, &GRAPHENE_POINT_INIT (x + PANGO_PIXELS (cursor2->x), y + PANGO_PIXELS (cursor2->y)));
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snapshot_insertion_cursor (snapshot,
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context,
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PANGO_PIXELS (cursor2->width),
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PANGO_PIXELS (cursor2->height),
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aspect_ratio,
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FALSE,
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