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native: add API to update opaque region
This abstracts the machinery to update the opaque region for a GtkWindow into GtkNative so it may be used from other native impelementations such as GtkPopover. Related #4689
This commit is contained in:
Christian Hergert
parent
90bccf4e82
commit
cc49e044a5
189
gtk/gtknative.c
189
gtk/gtknative.c
@ -19,10 +19,17 @@
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#include "config.h"
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#include <math.h>
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#include "gtkintl.h"
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#include "gtkcssboxesimplprivate.h"
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#include "gtkcsscolorvalueprivate.h"
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#include "gtkcsscornervalueprivate.h"
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#include "gtkcssnodeprivate.h"
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#include "gtkcssshadowvalueprivate.h"
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#include "gtknativeprivate.h"
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#include "gtkwidgetprivate.h"
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#include "gtkintl.h"
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#include "gtkcssnodeprivate.h"
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#include "gdk/gdksurfaceprivate.h"
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@ -297,3 +304,181 @@ gtk_native_queue_relayout (GtkNative *self)
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gdk_frame_clock_request_phase (clock, GDK_FRAME_CLOCK_PHASE_UPDATE);
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gdk_surface_request_layout (surface);
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}
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static void
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corner_rect (const GtkCssValue *value,
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cairo_rectangle_int_t *rect)
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{
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rect->width = _gtk_css_corner_value_get_x (value, 100);
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rect->height = _gtk_css_corner_value_get_y (value, 100);
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}
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static void
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subtract_decoration_corners_from_region (cairo_region_t *region,
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cairo_rectangle_int_t *extents,
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const GtkCssStyle *style)
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{
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cairo_rectangle_int_t rect;
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corner_rect (style->border->border_top_left_radius, &rect);
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rect.x = extents->x;
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rect.y = extents->y;
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cairo_region_subtract_rectangle (region, &rect);
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corner_rect (style->border->border_top_right_radius, &rect);
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rect.x = extents->x + extents->width - rect.width;
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rect.y = extents->y;
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cairo_region_subtract_rectangle (region, &rect);
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corner_rect (style->border->border_bottom_left_radius, &rect);
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rect.x = extents->x;
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rect.y = extents->y + extents->height - rect.height;
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cairo_region_subtract_rectangle (region, &rect);
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corner_rect (style->border->border_bottom_right_radius, &rect);
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rect.x = extents->x + extents->width - rect.width;
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rect.y = extents->y + extents->height - rect.height;
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cairo_region_subtract_rectangle (region, &rect);
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}
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static int
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get_translucent_border_edge (const GtkCssValue *color,
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const GtkCssValue *border_color,
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const GtkCssValue *border_width)
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{
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if (border_color == NULL)
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border_color = color;
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if (!gdk_rgba_is_opaque (gtk_css_color_value_get_rgba (border_color)))
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return round (_gtk_css_number_value_get (border_width, 100));
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return 0;
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}
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static void
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get_translucent_border_width (GtkWidget *widget,
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GtkBorder *border)
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{
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GtkCssNode *css_node = gtk_widget_get_css_node (widget);
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GtkCssStyle *style = gtk_css_node_get_style (css_node);
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border->top = get_translucent_border_edge (style->core->color,
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style->border->border_top_color,
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style->border->border_top_width);
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border->bottom = get_translucent_border_edge (style->core->color,
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style->border->border_bottom_color,
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style->border->border_bottom_width);
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border->left = get_translucent_border_edge (style->core->color,
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style->border->border_left_color,
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style->border->border_left_width);
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border->right = get_translucent_border_edge (style->core->color,
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style->border->border_right_color,
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style->border->border_right_width);
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}
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static gboolean
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get_opaque_rect (GtkWidget *widget,
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const GtkCssStyle *style,
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cairo_rectangle_int_t *rect)
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{
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gboolean is_opaque = gdk_rgba_is_opaque (gtk_css_color_value_get_rgba (style->background->background_color));
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if (is_opaque && gtk_widget_get_opacity (widget) < 1.0)
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is_opaque = FALSE;
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if (is_opaque)
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{
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const graphene_rect_t *border_rect;
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GtkCssBoxes css_boxes;
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GtkBorder border;
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gtk_css_boxes_init (&css_boxes, widget);
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border_rect = gtk_css_boxes_get_border_rect (&css_boxes);
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get_translucent_border_width (widget, &border);
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rect->x = border_rect->origin.x + border.left;
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rect->y = border_rect->origin.y + border.top;
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rect->width = border_rect->size.width - border.left - border.right;
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rect->height = border_rect->size.height - border.top - border.bottom;
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}
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return is_opaque;
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}
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static void
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get_shadow_width (GtkWidget *widget,
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GtkBorder *shadow_width,
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int resize_handle_size)
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{
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GtkCssNode *css_node = gtk_widget_get_css_node (widget);
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const GtkCssStyle *style = gtk_css_node_get_style (css_node);
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gtk_css_shadow_value_get_extents (style->background->box_shadow, shadow_width);
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shadow_width->left = MAX (shadow_width->left, resize_handle_size);
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shadow_width->top = MAX (shadow_width->top, resize_handle_size);
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shadow_width->bottom = MAX (shadow_width->bottom, resize_handle_size);
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shadow_width->right = MAX (shadow_width->right, resize_handle_size);
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}
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void
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gtk_native_update_opaque_region (GtkNative *native,
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GtkWidget *contents,
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gboolean subtract_decoration_corners,
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gboolean subtract_shadow,
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int resize_handle_size)
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{
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cairo_rectangle_int_t rect;
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cairo_region_t *opaque_region = NULL;
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const GtkCssStyle *style;
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GtkCssNode *css_node;
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GdkSurface *surface;
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GtkBorder shadow;
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g_return_if_fail (GTK_IS_NATIVE (native));
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g_return_if_fail (!contents || GTK_IS_WIDGET (contents));
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if (contents == NULL)
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contents = GTK_WIDGET (native);
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if (!_gtk_widget_get_realized (GTK_WIDGET (native)) ||
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!_gtk_widget_get_realized (contents))
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return;
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css_node = gtk_widget_get_css_node (contents);
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if (subtract_shadow)
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get_shadow_width (contents, &shadow, resize_handle_size);
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else
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shadow = (GtkBorder) {0, 0, 0, 0};
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surface = gtk_native_get_surface (native);
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style = gtk_css_node_get_style (css_node);
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if (get_opaque_rect (contents, style, &rect))
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{
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double native_x, native_y;
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gtk_native_get_surface_transform (native, &native_x, &native_y);
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rect.x += native_x;
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rect.y += native_y;
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if (contents != GTK_WIDGET (native))
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{
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double contents_x, contents_y;
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gtk_widget_translate_coordinates (contents, GTK_WIDGET (native), 0, 0, &contents_x, &contents_y);
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rect.x += contents_x;
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rect.y += contents_y;
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}
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opaque_region = cairo_region_create_rectangle (&rect);
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if (subtract_decoration_corners)
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subtract_decoration_corners_from_region (opaque_region, &rect, style);
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}
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gdk_surface_set_opaque_region (surface, opaque_region);
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cairo_region_destroy (opaque_region);
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}
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@ -29,6 +29,11 @@ struct _GtkNativeInterface
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};
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void gtk_native_queue_relayout (GtkNative *native);
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void gtk_native_update_opaque_region (GtkNative *native,
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GtkWidget *contents,
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gboolean subtract_decoration_corners,
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gboolean subtract_shadow,
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int resize_handle_size);
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G_END_DECLS
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