electron/atom/browser/web_contents_preferences.cc

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// Copyright (c) 2015 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "atom/browser/web_contents_preferences.h"
#include <algorithm>
#include <string>
#include <vector>
#include "atom/browser/native_window.h"
#include "atom/browser/web_view_manager.h"
#include "atom/common/native_mate_converters/value_converter.h"
#include "atom/common/options_switches.h"
#include "base/command_line.h"
#include "base/memory/ptr_util.h"
#include "base/strings/string_number_conversions.h"
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#include "cc/base/switches.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/web_preferences.h"
#include "native_mate/dictionary.h"
#include "net/base/filename_util.h"
#if defined(OS_WIN)
#include "ui/gfx/switches.h"
#endif
DEFINE_WEB_CONTENTS_USER_DATA_KEY(atom::WebContentsPreferences);
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namespace atom {
// static
std::vector<WebContentsPreferences*> WebContentsPreferences::instances_;
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WebContentsPreferences::WebContentsPreferences(
content::WebContents* web_contents,
const mate::Dictionary& web_preferences)
: web_contents_(web_contents) {
v8::Isolate* isolate = web_preferences.isolate();
mate::Dictionary copied(isolate, web_preferences.GetHandle()->Clone());
// Following fields should not be stored.
copied.Delete("embedder");
copied.Delete("isGuest");
copied.Delete("session");
mate::ConvertFromV8(isolate, copied.GetHandle(), &dict_);
web_contents->SetUserData(UserDataKey(), base::WrapUnique(this));
instances_.push_back(this);
// Set WebPreferences defaults onto the JS object
SetDefaultBoolIfUndefined("plugins", false);
SetDefaultBoolIfUndefined(options::kExperimentalFeatures, false);
SetDefaultBoolIfUndefined(options::kExperimentalCanvasFeatures, false);
bool node = SetDefaultBoolIfUndefined(options::kNodeIntegration, true);
SetDefaultBoolIfUndefined(options::kNodeIntegrationInWorker, false);
SetDefaultBoolIfUndefined(options::kWebviewTag, node);
SetDefaultBoolIfUndefined("sandbox", false);
SetDefaultBoolIfUndefined("nativeWindowOpen", false);
SetDefaultBoolIfUndefined(options::kContextIsolation, false);
SetDefaultBoolIfUndefined("javascript", true);
SetDefaultBoolIfUndefined("images", true);
SetDefaultBoolIfUndefined("textAreasAreResizable", true);
SetDefaultBoolIfUndefined("webgl", true);
bool webSecurity = true;
SetDefaultBoolIfUndefined("webSecurity", webSecurity);
// If webSecurity was explicity set to false, let's inherit that into
// insecureContent
if (web_preferences.Get("webSecurity", &webSecurity) && !webSecurity) {
SetDefaultBoolIfUndefined("allowRunningInsecureContent", true);
} else {
SetDefaultBoolIfUndefined("allowRunningInsecureContent", false);
}
#if defined(OS_MACOSX)
SetDefaultBoolIfUndefined(options::kScrollBounce, false);
#endif
SetDefaultBoolIfUndefined("offscreen", false);
last_dict_ = std::move(*dict_.CreateDeepCopy());
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}
WebContentsPreferences::~WebContentsPreferences() {
instances_.erase(
std::remove(instances_.begin(), instances_.end(), this),
instances_.end());
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}
bool WebContentsPreferences::SetDefaultBoolIfUndefined(
const base::StringPiece& key, bool val) {
bool existing;
if (!dict_.GetBoolean(key, &existing)) {
dict_.SetBoolean(key, val);
return val;
}
return existing;
}
bool WebContentsPreferences::IsEnabled(const base::StringPiece& name,
bool default_value) {
bool bool_value = default_value;
dict_.GetBoolean(name, &bool_value);
return bool_value;
}
void WebContentsPreferences::Merge(const base::DictionaryValue& extend) {
dict_.MergeDictionary(&extend);
}
// static
content::WebContents* WebContentsPreferences::GetWebContentsFromProcessID(
int process_id) {
for (WebContentsPreferences* preferences : instances_) {
content::WebContents* web_contents = preferences->web_contents_;
if (web_contents->GetMainFrame()->GetProcess()->GetID() == process_id)
return web_contents;
}
return nullptr;
}
// static
WebContentsPreferences* WebContentsPreferences::From(
content::WebContents* web_contents) {
if (!web_contents)
return nullptr;
return FromWebContents(web_contents);
}
void WebContentsPreferences::AppendCommandLineSwitches(
base::CommandLine* command_line) {
bool b;
// Check if plugins are enabled.
if (dict_.GetBoolean("plugins", &b) && b)
command_line->AppendSwitch(switches::kEnablePlugins);
// Experimental flags.
if (dict_.GetBoolean(options::kExperimentalFeatures, &b) && b)
command_line->AppendSwitch(
::switches::kEnableExperimentalWebPlatformFeatures);
if (dict_.GetBoolean(options::kExperimentalCanvasFeatures, &b) && b)
command_line->AppendSwitch(::switches::kEnableExperimentalCanvasFeatures);
// Check if we have node integration specified.
bool node_integration = true;
dict_.GetBoolean(options::kNodeIntegration, &node_integration);
command_line->AppendSwitchASCII(switches::kNodeIntegration,
node_integration ? "true" : "false");
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// Whether to enable node integration in Worker.
if (dict_.GetBoolean(options::kNodeIntegrationInWorker, &b) && b)
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command_line->AppendSwitch(switches::kNodeIntegrationInWorker);
// Check if webview tag creation is enabled, default to nodeIntegration value.
// TODO(kevinsawicki): Default to false in 2.0
bool webview_tag = node_integration;
dict_.GetBoolean(options::kWebviewTag, &webview_tag);
command_line->AppendSwitchASCII(switches::kWebviewTag,
webview_tag ? "true" : "false");
// If the `sandbox` option was passed to the BrowserWindow's webPreferences,
// pass `--enable-sandbox` to the renderer so it won't have any node.js
// integration.
if (dict_.GetBoolean("sandbox", &b) && b)
command_line->AppendSwitch(switches::kEnableSandbox);
else if (!command_line->HasSwitch(switches::kEnableSandbox))
command_line->AppendSwitch(::switches::kNoSandbox);
if (dict_.GetBoolean("nativeWindowOpen", &b) && b)
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command_line->AppendSwitch(switches::kNativeWindowOpen);
// The preload script.
base::FilePath::StringType preload;
if (dict_.GetString(options::kPreloadScript, &preload)) {
if (base::FilePath(preload).IsAbsolute())
command_line->AppendSwitchNative(switches::kPreloadScript, preload);
else
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LOG(ERROR) << "preload script must have absolute path.";
} else if (dict_.GetString(options::kPreloadURL, &preload)) {
// Translate to file path if there is "preload-url" option.
base::FilePath preload_path;
if (net::FileURLToFilePath(GURL(preload), &preload_path))
command_line->AppendSwitchPath(switches::kPreloadScript, preload_path);
else
LOG(ERROR) << "preload url must be file:// protocol.";
}
// Custom args for renderer process
base::Value* customArgs;
if (dict_.Get(options::kCustomArgs, &customArgs) &&
customArgs->is_list()) {
for (const base::Value& customArg : customArgs->GetList()) {
if (customArg.is_string())
command_line->AppendArg(customArg.GetString());
}
}
// Run Electron APIs and preload script in isolated world
if (dict_.GetBoolean(options::kContextIsolation, &b) && b)
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command_line->AppendSwitch(switches::kContextIsolation);
// --background-color.
std::string s;
if (dict_.GetString(options::kBackgroundColor, &s))
command_line->AppendSwitchASCII(switches::kBackgroundColor, s);
// --guest-instance-id, which is used to identify guest WebContents.
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int guest_instance_id = 0;
if (dict_.GetInteger(options::kGuestInstanceID, &guest_instance_id))
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command_line->AppendSwitchASCII(switches::kGuestInstanceID,
base::IntToString(guest_instance_id));
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// Pass the opener's window id.
int opener_id;
if (dict_.GetInteger(options::kOpenerID, &opener_id))
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command_line->AppendSwitchASCII(switches::kOpenerID,
base::IntToString(opener_id));
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#if defined(OS_MACOSX)
// Enable scroll bounce.
if (dict_.GetBoolean(options::kScrollBounce, &b) && b)
command_line->AppendSwitch(switches::kScrollBounce);
#endif
// Custom command line switches.
const base::ListValue* args;
if (dict_.GetList("commandLineSwitches", &args)) {
for (size_t i = 0; i < args->GetSize(); ++i) {
std::string arg;
if (args->GetString(i, &arg) && !arg.empty())
command_line->AppendSwitch(arg);
}
}
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// Enable blink features.
if (dict_.GetString(options::kBlinkFeatures, &s))
command_line->AppendSwitchASCII(::switches::kEnableBlinkFeatures, s);
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// Disable blink features.
if (dict_.GetString(options::kDisableBlinkFeatures, &s))
command_line->AppendSwitchASCII(::switches::kDisableBlinkFeatures, s);
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if (guest_instance_id) {
// Webview `document.visibilityState` tracks window visibility so we need
// to let it know if the window happens to be hidden right now.
auto* manager = WebViewManager::GetWebViewManager(web_contents_);
if (manager) {
auto* embedder = manager->GetEmbedder(guest_instance_id);
if (embedder) {
auto* relay = NativeWindowRelay::FromWebContents(embedder);
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if (relay) {
auto* window = relay->window.get();
if (window) {
const bool visible = window->IsVisible() && !window->IsMinimized();
if (!visible) {
command_line->AppendSwitch(switches::kHiddenPage);
}
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}
}
}
}
}
// We are appending args to a webContents so let's save the current state
// of our preferences object so that during the lifetime of the WebContents
// we can fetch the options used to initally configure the WebContents
last_dict_ = std::move(*dict_.CreateDeepCopy());
}
void WebContentsPreferences::OverrideWebkitPrefs(
content::WebPreferences* prefs) {
bool b;
if (dict_.GetBoolean("javascript", &b))
prefs->javascript_enabled = b;
if (dict_.GetBoolean("images", &b))
prefs->images_enabled = b;
if (dict_.GetBoolean("textAreasAreResizable", &b))
prefs->text_areas_are_resizable = b;
if (dict_.GetBoolean("webgl", &b)) {
prefs->webgl1_enabled = b;
prefs->webgl2_enabled = b;
}
if (dict_.GetBoolean("webSecurity", &b)) {
prefs->web_security_enabled = b;
prefs->allow_running_insecure_content = !b;
}
if (dict_.GetBoolean("allowRunningInsecureContent", &b))
prefs->allow_running_insecure_content = b;
const base::DictionaryValue* fonts = nullptr;
if (dict_.GetDictionary("defaultFontFamily", &fonts)) {
base::string16 font;
if (fonts->GetString("standard", &font))
prefs->standard_font_family_map[content::kCommonScript] = font;
if (fonts->GetString("serif", &font))
prefs->serif_font_family_map[content::kCommonScript] = font;
if (fonts->GetString("sansSerif", &font))
prefs->sans_serif_font_family_map[content::kCommonScript] = font;
if (fonts->GetString("monospace", &font))
prefs->fixed_font_family_map[content::kCommonScript] = font;
if (fonts->GetString("cursive", &font))
prefs->cursive_font_family_map[content::kCommonScript] = font;
if (fonts->GetString("fantasy", &font))
prefs->fantasy_font_family_map[content::kCommonScript] = font;
}
int size;
if (GetInteger("defaultFontSize", &size))
prefs->default_font_size = size;
if (GetInteger("defaultMonospaceFontSize", &size))
prefs->default_fixed_font_size = size;
if (GetInteger("minimumFontSize", &size))
prefs->minimum_font_size = size;
std::string encoding;
if (dict_.GetString("defaultEncoding", &encoding))
prefs->default_encoding = encoding;
}
bool WebContentsPreferences::GetInteger(const base::StringPiece& attribute_name,
int* val) {
// if it is already an integer, no conversion needed
if (dict_.GetInteger(attribute_name, val))
return true;
std::string str;
if (dict_.GetString(attribute_name, &str))
return base::StringToInt(str, val);
return false;
}
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} // namespace atom