forked from mirrors/gecko-dev
4920407bb3
Using `dlsym` for `gdk_wayland_display_get_type` is a cleaner solution to bug 1696319, allowing running with a GTK that lacks the Wayland backend. Also adds a symmetric implementation for `gdk_x11_display_get_type`, which should help running without X11. Differential Revision: https://phabricator.services.mozilla.com/D107406
78 lines
2.2 KiB
C++
78 lines
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "WidgetUtilsGtk.h"
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#include "nsWindow.h"
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#include <gtk/gtk.h>
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#include <dlfcn.h>
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namespace mozilla {
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namespace widget {
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int32_t WidgetUtilsGTK::IsTouchDeviceSupportPresent() {
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int32_t result = 0;
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GdkDisplay* display = gdk_display_get_default();
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if (!display) {
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return 0;
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}
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GdkDeviceManager* manager = gdk_display_get_device_manager(display);
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if (!manager) {
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return 0;
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}
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GList* devices =
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gdk_device_manager_list_devices(manager, GDK_DEVICE_TYPE_SLAVE);
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GList* list = devices;
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while (devices) {
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GdkDevice* device = static_cast<GdkDevice*>(devices->data);
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if (gdk_device_get_source(device) == GDK_SOURCE_TOUCHSCREEN) {
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result = 1;
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break;
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}
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devices = devices->next;
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}
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if (list) {
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g_list_free(list);
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}
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return result;
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}
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bool IsMainWindowTransparent() {
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return nsWindow::IsToplevelWindowTransparent();
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}
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// We avoid linking gdk_*_display_get_type directly in order to avoid a runtime
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// dependency on GTK built with both backends. Other X11- and Wayland-specific
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// functions get stubbed out by libmozgtk and crash when called, but those
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// should only be called when the matching backend is already in use.
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bool GdkIsWaylandDisplay(GdkDisplay* display) {
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static auto sGdkWaylandDisplayGetType =
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(GType(*)())dlsym(RTLD_DEFAULT, "gdk_wayland_display_get_type");
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return sGdkWaylandDisplayGetType &&
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G_TYPE_CHECK_INSTANCE_TYPE(display, sGdkWaylandDisplayGetType());
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}
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bool GdkIsX11Display(GdkDisplay* display) {
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static auto sGdkX11DisplayGetType =
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(GType(*)())dlsym(RTLD_DEFAULT, "gdk_x11_display_get_type");
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return sGdkX11DisplayGetType &&
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G_TYPE_CHECK_INSTANCE_TYPE(display, sGdkX11DisplayGetType());
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}
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bool GdkIsWaylandDisplay() {
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return GdkIsWaylandDisplay(gdk_display_get_default());
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}
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bool GdkIsX11Display() { return GdkIsX11Display(gdk_display_get_default()); }
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} // namespace widget
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} // namespace mozilla
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