mirror of
https://bitbucket.org/chromiumembedded/cef
synced 2025-06-05 21:39:12 +02:00
28c7f04001
This functionality stopped being relevant after the removal of Flash support in January 2021. The last remaining PPAPI plugin (PDF viewer) will switch to a non-plugin implementation (PdfUnseasoned) in M100.
437 lines
18 KiB
C++
437 lines
18 KiB
C++
// Copyright (c) 2010 The Chromium Embedded Framework Authors. All rights
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// reserved. Use of this source code is governed by a BSD-style license that can
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// be found in the LICENSE file.
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#include "libcef/browser/prefs/renderer_prefs.h"
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#include <string>
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#include "libcef/browser/alloy/alloy_browser_host_impl.h"
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#include "libcef/browser/context.h"
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#include "libcef/browser/extensions/browser_extensions_util.h"
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#include "libcef/common/cef_switches.h"
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#include "libcef/common/extensions/extensions_util.h"
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#include "libcef/features/runtime_checks.h"
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#include "base/command_line.h"
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#include "base/i18n/character_encoding.h"
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#include "base/memory/ptr_util.h"
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#include "base/values.h"
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#include "chrome/browser/accessibility/animation_policy_prefs.h"
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#include "chrome/browser/defaults.h"
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#include "chrome/browser/extensions/extension_webkit_preferences.h"
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#include "chrome/browser/font_family_cache.h"
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#include "chrome/browser/profiles/profile.h"
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#include "chrome/browser/ui/prefs/prefs_tab_helper.h"
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#include "chrome/common/chrome_features.h"
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#include "chrome/common/chrome_switches.h"
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#include "chrome/common/pref_names.h"
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#include "components/pref_registry/pref_registry_syncable.h"
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#include "components/prefs/command_line_pref_store.h"
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#include "components/prefs/pref_service.h"
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#include "components/prefs/pref_store.h"
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#include "content/public/browser/render_process_host.h"
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#include "content/public/browser/render_view_host.h"
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#include "content/public/browser/site_instance.h"
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#include "content/public/browser/web_contents.h"
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#include "content/public/common/url_constants.h"
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#include "extensions/browser/extension_registry.h"
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#include "extensions/browser/view_type_utils.h"
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#include "extensions/common/constants.h"
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#include "media/media_buildflags.h"
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#include "third_party/blink/public/common/peerconnection/webrtc_ip_handling_policy.h"
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#include "third_party/blink/public/common/web_preferences/web_preferences.h"
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#include "ui/native_theme/native_theme.h"
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namespace renderer_prefs {
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namespace {
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// Chrome preferences.
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// Should match ChromeContentBrowserClient::OverrideWebkitPrefs.
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void SetChromePrefs(Profile* profile, blink::web_pref::WebPreferences& web) {
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PrefService* prefs = profile->GetPrefs();
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// Fill per-script font preferences.
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FontFamilyCache::FillFontFamilyMap(profile,
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prefs::kWebKitStandardFontFamilyMap,
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&web.standard_font_family_map);
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FontFamilyCache::FillFontFamilyMap(profile, prefs::kWebKitFixedFontFamilyMap,
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&web.fixed_font_family_map);
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FontFamilyCache::FillFontFamilyMap(profile, prefs::kWebKitSerifFontFamilyMap,
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&web.serif_font_family_map);
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FontFamilyCache::FillFontFamilyMap(profile,
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prefs::kWebKitSansSerifFontFamilyMap,
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&web.sans_serif_font_family_map);
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FontFamilyCache::FillFontFamilyMap(profile,
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prefs::kWebKitCursiveFontFamilyMap,
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&web.cursive_font_family_map);
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FontFamilyCache::FillFontFamilyMap(profile,
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prefs::kWebKitFantasyFontFamilyMap,
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&web.fantasy_font_family_map);
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web.default_font_size = prefs->GetInteger(prefs::kWebKitDefaultFontSize);
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web.default_fixed_font_size =
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prefs->GetInteger(prefs::kWebKitDefaultFixedFontSize);
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web.minimum_font_size = prefs->GetInteger(prefs::kWebKitMinimumFontSize);
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web.minimum_logical_font_size =
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prefs->GetInteger(prefs::kWebKitMinimumLogicalFontSize);
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web.default_encoding = prefs->GetString(prefs::kDefaultCharset);
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web.dom_paste_enabled = prefs->GetBoolean(prefs::kWebKitDomPasteEnabled);
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web.tabs_to_links = prefs->GetBoolean(prefs::kWebkitTabsToLinks);
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if (!prefs->GetBoolean(prefs::kWebKitJavascriptEnabled))
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web.javascript_enabled = false;
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if (!prefs->GetBoolean(prefs::kWebKitWebSecurityEnabled))
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web.web_security_enabled = false;
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if (!prefs->GetBoolean(prefs::kWebKitPluginsEnabled))
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web.plugins_enabled = false;
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web.loads_images_automatically =
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prefs->GetBoolean(prefs::kWebKitLoadsImagesAutomatically);
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if (prefs->GetBoolean(prefs::kDisable3DAPIs)) {
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web.webgl1_enabled = false;
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web.webgl2_enabled = false;
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}
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web.allow_running_insecure_content =
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prefs->GetBoolean(prefs::kWebKitAllowRunningInsecureContent);
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web.password_echo_enabled = browser_defaults::kPasswordEchoEnabled;
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web.text_areas_are_resizable =
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prefs->GetBoolean(prefs::kWebKitTextAreasAreResizable);
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web.hyperlink_auditing_enabled =
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prefs->GetBoolean(prefs::kEnableHyperlinkAuditing);
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if (extensions::ExtensionsEnabled()) {
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std::string image_animation_policy =
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prefs->GetString(prefs::kAnimationPolicy);
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if (image_animation_policy == kAnimationPolicyOnce) {
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web.animation_policy =
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blink::mojom::ImageAnimationPolicy::kImageAnimationPolicyAnimateOnce;
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} else if (image_animation_policy == kAnimationPolicyNone) {
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web.animation_policy =
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blink::mojom::ImageAnimationPolicy::kImageAnimationPolicyNoAnimation;
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} else {
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web.animation_policy =
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blink::mojom::ImageAnimationPolicy::kImageAnimationPolicyAllowed;
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}
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}
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// Make sure we will set the default_encoding with canonical encoding name.
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web.default_encoding =
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base::GetCanonicalEncodingNameByAliasName(web.default_encoding);
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if (web.default_encoding.empty()) {
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prefs->ClearPref(prefs::kDefaultCharset);
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web.default_encoding = prefs->GetString(prefs::kDefaultCharset);
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}
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DCHECK(!web.default_encoding.empty());
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if (base::CommandLine::ForCurrentProcess()->HasSwitch(
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switches::kEnablePotentiallyAnnoyingSecurityFeatures)) {
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web.disable_reading_from_canvas = true;
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web.strict_mixed_content_checking = true;
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web.strict_powerful_feature_restrictions = true;
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}
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}
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// Extension preferences.
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// Should match ChromeContentBrowserClientExtensionsPart::OverrideWebkitPrefs.
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void SetExtensionPrefs(content::WebContents* web_contents,
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content::RenderViewHost* rvh,
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blink::web_pref::WebPreferences& web) {
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if (!extensions::ExtensionsEnabled())
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return;
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const extensions::ExtensionRegistry* registry =
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extensions::ExtensionRegistry::Get(
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rvh->GetProcess()->GetBrowserContext());
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if (!registry)
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return;
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// Note: it's not possible for kExtensionsScheme to change during the lifetime
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// of the process.
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//
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// Ensure that we are only granting extension preferences to URLs with the
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// correct scheme. Without this check, chrome-guest:// schemes used by webview
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// tags as well as hosts that happen to match the id of an installed extension
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// would get the wrong preferences.
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const GURL& site_url =
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web_contents->GetMainFrame()->GetSiteInstance()->GetSiteURL();
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if (!site_url.SchemeIs(extensions::kExtensionScheme))
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return;
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const extensions::Extension* extension =
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registry->enabled_extensions().GetByID(site_url.host());
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extension_webkit_preferences::SetPreferences(extension, &web);
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}
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void SetString(CommandLinePrefStore* prefs,
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const std::string& key,
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const std::string& value) {
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prefs->SetValue(key, base::WrapUnique(new base::Value(value)),
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WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
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}
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void SetBool(CommandLinePrefStore* prefs, const std::string& key, bool value) {
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prefs->SetValue(key, base::WrapUnique(new base::Value(value)),
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WriteablePrefStore::DEFAULT_PREF_WRITE_FLAGS);
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}
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blink::mojom::PreferredColorScheme ToBlinkPreferredColorScheme(
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ui::NativeTheme::PreferredColorScheme native_theme_scheme) {
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switch (native_theme_scheme) {
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case ui::NativeTheme::PreferredColorScheme::kDark:
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return blink::mojom::PreferredColorScheme::kDark;
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case ui::NativeTheme::PreferredColorScheme::kLight:
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return blink::mojom::PreferredColorScheme::kLight;
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}
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NOTREACHED();
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}
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// From chrome/browser/chrome_content_browser_client.cc
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// Returns true if preferred color scheme is modified based on at least one of
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// the following -
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// |url| - Last committed url.
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// |native_theme| - For other platforms based on native theme scheme.
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bool UpdatePreferredColorScheme(blink::web_pref::WebPreferences* web_prefs,
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const GURL& url,
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const ui::NativeTheme* native_theme) {
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auto old_preferred_color_scheme = web_prefs->preferred_color_scheme;
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// Update based on native theme scheme.
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web_prefs->preferred_color_scheme =
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ToBlinkPreferredColorScheme(native_theme->GetPreferredColorScheme());
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// Force a light preferred color scheme on certain URLs if kWebUIDarkMode is
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// disabled; some of the UI is not yet correctly themed.
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if (!base::FeatureList::IsEnabled(features::kWebUIDarkMode)) {
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// Update based on last committed url.
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bool force_light = url.SchemeIs(content::kChromeUIScheme);
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if (!force_light) {
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force_light = url.SchemeIs(extensions::kExtensionScheme) &&
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url.host_piece() == extension_misc::kPdfExtensionId;
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}
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if (force_light) {
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web_prefs->preferred_color_scheme =
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blink::mojom::PreferredColorScheme::kLight;
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}
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}
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return old_preferred_color_scheme != web_prefs->preferred_color_scheme;
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}
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} // namespace
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void SetCommandLinePrefDefaults(CommandLinePrefStore* prefs) {
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const base::CommandLine* command_line =
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base::CommandLine::ForCurrentProcess();
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if (command_line->HasSwitch(switches::kDefaultEncoding)) {
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SetString(prefs, prefs::kDefaultCharset,
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command_line->GetSwitchValueASCII(switches::kDefaultEncoding));
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}
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if (command_line->HasSwitch(switches::kDisableJavascriptDomPaste))
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SetBool(prefs, prefs::kWebKitDomPasteEnabled, false);
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if (command_line->HasSwitch(switches::kDisableImageLoading))
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SetBool(prefs, prefs::kWebKitLoadsImagesAutomatically, false);
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if (command_line->HasSwitch(switches::kDisableTabToLinks))
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SetBool(prefs, prefs::kWebkitTabsToLinks, false);
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}
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void SetDefaultPrefs(blink::web_pref::WebPreferences& web) {
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const base::CommandLine* command_line =
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base::CommandLine::ForCurrentProcess();
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web.javascript_enabled =
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!command_line->HasSwitch(switches::kDisableJavascript);
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web.allow_scripts_to_close_windows =
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!command_line->HasSwitch(switches::kDisableJavascriptCloseWindows);
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web.javascript_can_access_clipboard =
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!command_line->HasSwitch(switches::kDisableJavascriptAccessClipboard);
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web.allow_universal_access_from_file_urls =
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command_line->HasSwitch(switches::kAllowUniversalAccessFromFileUrls);
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web.shrinks_standalone_images_to_fit =
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command_line->HasSwitch(switches::kImageShrinkStandaloneToFit);
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web.text_areas_are_resizable =
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!command_line->HasSwitch(switches::kDisableTextAreaResize);
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}
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// Helper macro for setting a WebPreferences variable based on the value of a
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// CefBrowserSettings variable.
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#define SET_STATE(cef_var, web_var) \
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if (cef_var == STATE_ENABLED) \
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web_var = true; \
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else if (cef_var == STATE_DISABLED) \
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web_var = false;
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void SetCefPrefs(const CefBrowserSettings& cef,
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blink::web_pref::WebPreferences& web) {
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if (cef.standard_font_family.length > 0) {
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web.standard_font_family_map[blink::web_pref::kCommonScript] =
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CefString(&cef.standard_font_family);
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}
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if (cef.fixed_font_family.length > 0) {
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web.fixed_font_family_map[blink::web_pref::kCommonScript] =
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CefString(&cef.fixed_font_family);
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}
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if (cef.serif_font_family.length > 0) {
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web.serif_font_family_map[blink::web_pref::kCommonScript] =
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CefString(&cef.serif_font_family);
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}
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if (cef.sans_serif_font_family.length > 0) {
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web.sans_serif_font_family_map[blink::web_pref::kCommonScript] =
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CefString(&cef.sans_serif_font_family);
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}
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if (cef.cursive_font_family.length > 0) {
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web.cursive_font_family_map[blink::web_pref::kCommonScript] =
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CefString(&cef.cursive_font_family);
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}
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if (cef.fantasy_font_family.length > 0) {
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web.fantasy_font_family_map[blink::web_pref::kCommonScript] =
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CefString(&cef.fantasy_font_family);
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}
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if (cef.default_font_size > 0)
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web.default_font_size = cef.default_font_size;
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if (cef.default_fixed_font_size > 0)
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web.default_fixed_font_size = cef.default_fixed_font_size;
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if (cef.minimum_font_size > 0)
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web.minimum_font_size = cef.minimum_font_size;
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if (cef.minimum_logical_font_size > 0)
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web.minimum_logical_font_size = cef.minimum_logical_font_size;
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if (cef.default_encoding.length > 0)
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web.default_encoding = CefString(&cef.default_encoding);
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SET_STATE(cef.remote_fonts, web.remote_fonts_enabled);
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SET_STATE(cef.javascript, web.javascript_enabled);
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SET_STATE(cef.javascript_close_windows, web.allow_scripts_to_close_windows);
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SET_STATE(cef.javascript_access_clipboard,
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web.javascript_can_access_clipboard);
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SET_STATE(cef.javascript_dom_paste, web.dom_paste_enabled);
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SET_STATE(cef.image_loading, web.loads_images_automatically);
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SET_STATE(cef.image_shrink_standalone_to_fit,
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web.shrinks_standalone_images_to_fit);
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SET_STATE(cef.text_area_resize, web.text_areas_are_resizable);
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SET_STATE(cef.tab_to_links, web.tabs_to_links);
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SET_STATE(cef.local_storage, web.local_storage_enabled);
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SET_STATE(cef.databases, web.databases_enabled);
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// Never explicitly enable GPU-related functions in this method because the
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// GPU blacklist is not being checked here.
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if (cef.webgl == STATE_DISABLED) {
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web.webgl1_enabled = false;
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web.webgl2_enabled = false;
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}
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}
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void RegisterProfilePrefs(user_prefs::PrefRegistrySyncable* registry,
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const std::string& locale) {
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PrefsTabHelper::RegisterProfilePrefs(registry, locale);
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RegisterAnimationPolicyPrefs(registry);
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// From chrome/browser/ui/browser_ui_prefs.cc RegisterBrowserUserPrefs.
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registry->RegisterBooleanPref(
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prefs::kEnableDoNotTrack, false,
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user_prefs::PrefRegistrySyncable::SYNCABLE_PREF);
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registry->RegisterBooleanPref(prefs::kCaretBrowsingEnabled, false);
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registry->RegisterStringPref(prefs::kWebRTCIPHandlingPolicy,
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blink::kWebRTCIPHandlingDefault);
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registry->RegisterStringPref(prefs::kWebRTCUDPPortRange, std::string());
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#if !BUILDFLAG(IS_MAC)
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registry->RegisterBooleanPref(prefs::kFullscreenAllowed, true);
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#endif
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// From ChromeContentBrowserClient::RegisterProfilePrefs.
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registry->RegisterBooleanPref(prefs::kDisable3DAPIs, false);
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registry->RegisterBooleanPref(prefs::kEnableHyperlinkAuditing, true);
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// From Profile::RegisterProfilePrefs.
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registry->RegisterDictionaryPref(prefs::kPartitionDefaultZoomLevel);
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registry->RegisterDictionaryPref(prefs::kPartitionPerHostZoomLevels);
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}
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void PopulateWebPreferences(content::RenderViewHost* rvh,
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blink::web_pref::WebPreferences& web,
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SkColor& base_background_color) {
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REQUIRE_ALLOY_RUNTIME();
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CefRefPtr<AlloyBrowserHostImpl> browser = static_cast<AlloyBrowserHostImpl*>(
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extensions::GetOwnerBrowserForHost(rvh, nullptr).get());
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// Set defaults for preferences that are not handled by PrefService.
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SetDefaultPrefs(web);
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// Set preferences based on the context's PrefService.
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if (browser) {
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auto profile = Profile::FromBrowserContext(
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browser->web_contents()->GetBrowserContext());
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SetChromePrefs(profile, web);
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}
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auto* native_theme = ui::NativeTheme::GetInstanceForWeb();
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switch (native_theme->GetPreferredColorScheme()) {
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case ui::NativeTheme::PreferredColorScheme::kDark:
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web.preferred_color_scheme = blink::mojom::PreferredColorScheme::kDark;
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break;
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case ui::NativeTheme::PreferredColorScheme::kLight:
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web.preferred_color_scheme = blink::mojom::PreferredColorScheme::kLight;
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break;
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}
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switch (native_theme->GetPreferredContrast()) {
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case ui::NativeTheme::PreferredContrast::kNoPreference:
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web.preferred_contrast = blink::mojom::PreferredContrast::kNoPreference;
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break;
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case ui::NativeTheme::PreferredContrast::kMore:
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web.preferred_contrast = blink::mojom::PreferredContrast::kMore;
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break;
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case ui::NativeTheme::PreferredContrast::kLess:
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web.preferred_contrast = blink::mojom::PreferredContrast::kLess;
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break;
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case ui::NativeTheme::PreferredContrast::kCustom:
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web.preferred_contrast = blink::mojom::PreferredContrast::kCustom;
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break;
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}
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auto web_contents = content::WebContents::FromRenderViewHost(rvh);
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UpdatePreferredColorScheme(
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&web, web_contents->GetMainFrame()->GetSiteInstance()->GetSiteURL(),
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native_theme);
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// Set preferences based on the extension.
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SetExtensionPrefs(web_contents, rvh, web);
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if (browser) {
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// Set preferences based on CefBrowserSettings.
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SetCefPrefs(browser->settings(), web);
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web.picture_in_picture_enabled = browser->IsPictureInPictureSupported();
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// Set the background color for the WebView.
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base_background_color = browser->GetBackgroundColor();
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} else {
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// We don't know for sure that the browser will be windowless but assume
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// that the global windowless state is likely to be accurate.
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base_background_color =
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CefContext::Get()->GetBackgroundColor(nullptr, STATE_DEFAULT);
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}
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}
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bool PopulateWebPreferencesAfterNavigation(
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content::WebContents* web_contents,
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blink::web_pref::WebPreferences& web) {
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auto* native_theme = ui::NativeTheme::GetInstanceForWeb();
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return UpdatePreferredColorScheme(&web, web_contents->GetLastCommittedURL(),
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native_theme);
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}
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} // namespace renderer_prefs
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