82 lines
2.2 KiB
C++
82 lines
2.2 KiB
C++
// Copyright (c) 2014 GitHub, Inc. All rights reserved.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "atom/browser/atom_browser_main_parts.h"
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#include "base/command_line.h"
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#include "base/strings/string_number_conversions.h"
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#include "library_loaders/libgio.h"
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#include "ui/gfx/switches.h"
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namespace atom {
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namespace {
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const char* kInterfaceSchema = "org.gnome.desktop.interface";
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const char* kScaleFactor = "scaling-factor";
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bool SchemaExists(const LibGioLoader& libgio_loader, const char* schema_name) {
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const gchar* const* schemas = libgio_loader.g_settings_list_schemas();
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while (*schemas) {
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if (strcmp(schema_name, static_cast<const char*>(*schemas)) == 0)
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return true;
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schemas++;
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}
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return false;
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}
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bool KeyExists(const LibGioLoader& libgio_loader, GSettings* client,
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const char* key) {
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gchar** keys = libgio_loader.g_settings_list_keys(client);
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if (!keys)
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return false;
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gchar** iter = keys;
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while (*iter) {
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if (strcmp(*iter, key) == 0)
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break;
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iter++;
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}
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bool exists = *iter != NULL;
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g_strfreev(keys);
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return exists;
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}
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void GetDPIFromGSettings(guint* scale_factor) {
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LibGioLoader libgio_loader;
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// Try also without .0 at the end; on some systems this may be required.
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if (!libgio_loader.Load("libgio-2.0.so.0") &&
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!libgio_loader.Load("libgio-2.0.so")) {
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VLOG(1) << "Cannot load gio library. Will fall back to gconf.";
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return;
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}
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GSettings* client = nullptr;
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if (!SchemaExists(libgio_loader, kInterfaceSchema) ||
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!(client = libgio_loader.g_settings_new(kInterfaceSchema))) {
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VLOG(1) << "Cannot create gsettings client.";
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return;
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}
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if (KeyExists(libgio_loader, client, kScaleFactor))
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*scale_factor = libgio_loader.g_settings_get_uint(client, kScaleFactor);
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g_object_unref(client);
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}
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} // namespace
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void AtomBrowserMainParts::SetDPIFromGSettings() {
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guint scale_factor = 1;
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GetDPIFromGSettings(&scale_factor);
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if (scale_factor == 0)
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scale_factor = 1;
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base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
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switches::kForceDeviceScaleFactor, base::UintToString(scale_factor));
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}
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} // namespace atom
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