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-rw-r--r--vcl/unx/gtk4/surfacecellrenderer.cxx241
1 files changed, 241 insertions, 0 deletions
diff --git a/vcl/unx/gtk4/surfacecellrenderer.cxx b/vcl/unx/gtk4/surfacecellrenderer.cxx
new file mode 100644
index 0000000000..2ae0782b98
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+++ b/vcl/unx/gtk4/surfacecellrenderer.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#include <vcl/svapp.hxx>
+#include "surfacecellrenderer.hxx"
+#include <cairo/cairo-gobject.h>
+
+namespace
+{
+struct _SurfaceCellRendererClass : public GtkCellRendererClass
+{
+};
+
+enum
+{
+ PROP_SURFACE = 10000,
+};
+}
+
+G_DEFINE_TYPE(SurfaceCellRenderer, surface_cell_renderer, GTK_TYPE_CELL_RENDERER)
+
+static void surface_cell_renderer_init(SurfaceCellRenderer* self)
+{
+ self->surface = nullptr;
+ // prevent loplugin:unreffun firing on macro generated function
+ (void)surface_cell_renderer_get_instance_private(self);
+}
+
+static void surface_cell_renderer_get_property(GObject* object, guint param_id, GValue* value,
+ GParamSpec* pspec)
+{
+ SurfaceCellRenderer* cellsurface = SURFACE_CELL_RENDERER(object);
+
+ switch (param_id)
+ {
+ case PROP_SURFACE:
+ g_value_set_boxed(value, cellsurface->surface);
+ break;
+ default:
+ G_OBJECT_CLASS(surface_cell_renderer_parent_class)
+ ->get_property(object, param_id, value, pspec);
+ break;
+ }
+}
+
+static void surface_cell_renderer_set_property(GObject* object, guint param_id, const GValue* value,
+ GParamSpec* pspec)
+{
+ SurfaceCellRenderer* cellsurface = SURFACE_CELL_RENDERER(object);
+
+ switch (param_id)
+ {
+ case PROP_SURFACE:
+ if (cellsurface->surface)
+ cairo_surface_destroy(cellsurface->surface);
+ cellsurface->surface = static_cast<cairo_surface_t*>(g_value_get_boxed(value));
+ if (cellsurface->surface)
+ cairo_surface_reference(cellsurface->surface);
+ break;
+ default:
+ G_OBJECT_CLASS(surface_cell_renderer_parent_class)
+ ->set_property(object, param_id, value, pspec);
+ break;
+ }
+}
+
+static bool surface_cell_renderer_get_preferred_size(GtkCellRenderer* cell,
+ GtkOrientation orientation, gint* minimum_size,
+ gint* natural_size);
+
+static void surface_cell_renderer_snapshot(GtkCellRenderer* cell, GtkSnapshot* snapshot,
+ GtkWidget* widget, const GdkRectangle* background_area,
+ const GdkRectangle* cell_area,
+ GtkCellRendererState flags);
+
+static void surface_cell_renderer_render(GtkCellRenderer* cell, cairo_t* cr, GtkWidget* widget,
+ const GdkRectangle* background_area,
+ const GdkRectangle* cell_area, GtkCellRendererState flags);
+
+static void surface_cell_renderer_finalize(GObject* object)
+{
+ SurfaceCellRenderer* cellsurface = SURFACE_CELL_RENDERER(object);
+
+ if (cellsurface->surface)
+ cairo_surface_destroy(cellsurface->surface);
+
+ G_OBJECT_CLASS(surface_cell_renderer_parent_class)->finalize(object);
+}
+
+static void surface_cell_renderer_get_preferred_width(GtkCellRenderer* cell, GtkWidget* widget,
+ gint* minimum_size, gint* natural_size)
+{
+ if (!surface_cell_renderer_get_preferred_size(cell, GTK_ORIENTATION_HORIZONTAL, minimum_size,
+ natural_size))
+ {
+ // fallback to parent if we're empty
+ GTK_CELL_RENDERER_CLASS(surface_cell_renderer_parent_class)
+ ->get_preferred_width(cell, widget, minimum_size, natural_size);
+ }
+}
+
+static void surface_cell_renderer_get_preferred_height(GtkCellRenderer* cell, GtkWidget* widget,
+ gint* minimum_size, gint* natural_size)
+{
+ if (!surface_cell_renderer_get_preferred_size(cell, GTK_ORIENTATION_VERTICAL, minimum_size,
+ natural_size))
+ {
+ // fallback to parent if we're empty
+ GTK_CELL_RENDERER_CLASS(surface_cell_renderer_parent_class)
+ ->get_preferred_height(cell, widget, minimum_size, natural_size);
+ }
+}
+
+static void surface_cell_renderer_get_preferred_height_for_width(GtkCellRenderer* cell,
+ GtkWidget* widget, gint /*width*/,
+ gint* minimum_height,
+ gint* natural_height)
+{
+ gtk_cell_renderer_get_preferred_height(cell, widget, minimum_height, natural_height);
+}
+
+static void surface_cell_renderer_get_preferred_width_for_height(GtkCellRenderer* cell,
+ GtkWidget* widget, gint /*height*/,
+ gint* minimum_width,
+ gint* natural_width)
+{
+ gtk_cell_renderer_get_preferred_width(cell, widget, minimum_width, natural_width);
+}
+
+void surface_cell_renderer_class_init(SurfaceCellRendererClass* klass)
+{
+ GtkCellRendererClass* cell_class = GTK_CELL_RENDERER_CLASS(klass);
+ GObjectClass* object_class = G_OBJECT_CLASS(klass);
+
+ /* Hook up functions to set and get our custom cell renderer properties */
+ object_class->get_property = surface_cell_renderer_get_property;
+ object_class->set_property = surface_cell_renderer_set_property;
+
+ surface_cell_renderer_parent_class = g_type_class_peek_parent(klass);
+ object_class->finalize = surface_cell_renderer_finalize;
+
+ cell_class->get_preferred_width = surface_cell_renderer_get_preferred_width;
+ cell_class->get_preferred_height = surface_cell_renderer_get_preferred_height;
+ cell_class->get_preferred_width_for_height
+ = surface_cell_renderer_get_preferred_width_for_height;
+ cell_class->get_preferred_height_for_width
+ = surface_cell_renderer_get_preferred_height_for_width;
+
+ cell_class->snapshot = surface_cell_renderer_snapshot;
+
+ g_object_class_install_property(
+ object_class, PROP_SURFACE,
+ g_param_spec_boxed("surface", "Surface", "The cairo surface to render",
+ CAIRO_GOBJECT_TYPE_SURFACE, G_PARAM_READWRITE));
+}
+
+GtkCellRenderer* surface_cell_renderer_new()
+{
+ return GTK_CELL_RENDERER(g_object_new(SURFACE_TYPE_CELL_RENDERER, nullptr));
+}
+
+static void get_surface_size(cairo_surface_t* pSurface, int& rWidth, int& rHeight)
+{
+ double x1, x2, y1, y2;
+ cairo_t* cr = cairo_create(pSurface);
+ cairo_clip_extents(cr, &x1, &y1, &x2, &y2);
+ cairo_destroy(cr);
+
+ rWidth = x2 - x1;
+ rHeight = y2 - y1;
+}
+
+bool surface_cell_renderer_get_preferred_size(GtkCellRenderer* cell, GtkOrientation orientation,
+ gint* minimum_size, gint* natural_size)
+{
+ SurfaceCellRenderer* cellsurface = SURFACE_CELL_RENDERER(cell);
+
+ int nWidth = 0;
+ int nHeight = 0;
+
+ if (cellsurface->surface)
+ get_surface_size(cellsurface->surface, nWidth, nHeight);
+
+ if (orientation == GTK_ORIENTATION_HORIZONTAL)
+ {
+ if (minimum_size)
+ *minimum_size = nWidth;
+
+ if (natural_size)
+ *natural_size = nWidth;
+ }
+ else
+ {
+ if (minimum_size)
+ *minimum_size = nHeight;
+
+ if (natural_size)
+ *natural_size = nHeight;
+ }
+
+ return true;
+}
+
+void surface_cell_renderer_render(GtkCellRenderer* cell, cairo_t* cr, GtkWidget* /*widget*/,
+ const GdkRectangle* /*background_area*/,
+ const GdkRectangle* cell_area, GtkCellRendererState /*flags*/)
+{
+ SurfaceCellRenderer* cellsurface = SURFACE_CELL_RENDERER(cell);
+ if (!cellsurface->surface)
+ return;
+
+ int nWidth, nHeight;
+ get_surface_size(cellsurface->surface, nWidth, nHeight);
+ int nXOffset = (cell_area->width - nWidth) / 2;
+ int nYOffset = (cell_area->height - nHeight) / 2;
+
+ cairo_set_source_surface(cr, cellsurface->surface, cell_area->x + nXOffset,
+ cell_area->y + nYOffset);
+ cairo_paint(cr);
+}
+
+static void surface_cell_renderer_snapshot(GtkCellRenderer* cell, GtkSnapshot* snapshot,
+ GtkWidget* widget, const GdkRectangle* background_area,
+ const GdkRectangle* cell_area,
+ GtkCellRendererState flags)
+{
+ graphene_rect_t rect = GRAPHENE_RECT_INIT(
+ static_cast<float>(cell_area->x), static_cast<float>(cell_area->y),
+ static_cast<float>(cell_area->width), static_cast<float>(cell_area->height));
+ cairo_t* cr = gtk_snapshot_append_cairo(GTK_SNAPSHOT(snapshot), &rect);
+ surface_cell_renderer_render(cell, cr, widget, background_area, cell_area, flags);
+ cairo_destroy(cr);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */