226 lines
9.1 KiB
C++
226 lines
9.1 KiB
C++
// Copyright (c) 2017 GitHub, Inc.
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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 "shell/renderer/electron_render_frame_observer.h"
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#include <utility>
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#include <vector>
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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 "base/trace_event/trace_event.h"
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#include "content/public/renderer/render_frame.h"
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#include "content/public/renderer/render_view.h"
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#include "electron/buildflags/buildflags.h"
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#include "electron/shell/common/api/api.mojom.h"
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#include "ipc/ipc_message_macros.h"
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#include "net/base/net_module.h"
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#include "net/grit/net_resources.h"
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#include "services/service_manager/public/cpp/interface_provider.h"
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#include "shell/common/gin_helper/microtasks_scope.h"
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#include "shell/common/options_switches.h"
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#include "shell/common/world_ids.h"
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#include "shell/renderer/renderer_client_base.h"
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#include "third_party/blink/public/common/associated_interfaces/associated_interface_provider.h"
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#include "third_party/blink/public/common/web_preferences/web_preferences.h"
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#include "third_party/blink/public/platform/web_isolated_world_info.h"
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#include "third_party/blink/public/web/blink.h"
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#include "third_party/blink/public/web/web_document.h"
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#include "third_party/blink/public/web/web_draggable_region.h"
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#include "third_party/blink/public/web/web_element.h"
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#include "third_party/blink/public/web/web_local_frame.h"
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#include "third_party/blink/public/web/web_script_source.h"
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#include "third_party/blink/renderer/core/frame/web_local_frame_impl.h" // nogncheck
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#include "ui/base/resource/resource_bundle.h"
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namespace electron {
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namespace {
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scoped_refptr<base::RefCountedMemory> NetResourceProvider(int key) {
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if (key == IDR_DIR_HEADER_HTML) {
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return ui::ResourceBundle::GetSharedInstance().LoadDataResourceBytes(
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IDR_DIR_HEADER_HTML);
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}
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return nullptr;
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}
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} // namespace
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ElectronRenderFrameObserver::ElectronRenderFrameObserver(
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content::RenderFrame* frame,
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RendererClientBase* renderer_client)
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: content::RenderFrameObserver(frame),
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render_frame_(frame),
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renderer_client_(renderer_client) {
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// Initialise resource for directory listing.
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net::NetModule::SetResourceProvider(NetResourceProvider);
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}
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void ElectronRenderFrameObserver::DidClearWindowObject() {
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// Do a delayed Node.js initialization for child window.
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// Check DidInstallConditionalFeatures below for the background.
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auto* web_frame =
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static_cast<blink::WebLocalFrameImpl*>(render_frame_->GetWebFrame());
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if (has_delayed_node_initialization_ && web_frame->Opener() &&
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!web_frame->IsOnInitialEmptyDocument()) {
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v8::Isolate* isolate = blink::MainThreadIsolate();
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v8::HandleScope handle_scope(isolate);
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v8::MicrotasksScope microtasks_scope(
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isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
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v8::Handle<v8::Context> context = web_frame->MainWorldScriptContext();
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v8::Context::Scope context_scope(context);
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// DidClearWindowObject only emits for the main world.
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DidInstallConditionalFeatures(context, MAIN_WORLD_ID);
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}
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renderer_client_->DidClearWindowObject(render_frame_);
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}
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void ElectronRenderFrameObserver::DidInstallConditionalFeatures(
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v8::Handle<v8::Context> context,
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int world_id) {
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// When a child window is created with window.open, its WebPreferences will
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// be copied from its parent, and Chromium will initialize JS context in it
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// immediately.
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// Normally the WebPreferences is overriden in browser before navigation,
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// but this behavior bypasses the browser side navigation and the child
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// window will get wrong WebPreferences in the initialization.
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// This will end up initializing Node.js in the child window with wrong
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// WebPreferences, leads to problem that child window having node integration
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// while "nodeIntegration=no" is passed.
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// We work around this issue by delaying the child window's initialization of
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// Node.js if this is the initial empty document, and only do it when the
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// actual page has started to load.
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auto* web_frame =
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static_cast<blink::WebLocalFrameImpl*>(render_frame_->GetWebFrame());
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if (web_frame->Opener() && web_frame->IsOnInitialEmptyDocument()) {
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// FIXME(zcbenz): Chromium does not do any browser side navigation for
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// window.open('about:blank'), so there is no way to override WebPreferences
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// of it. We should not delay Node.js initialization as there will be no
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// further loadings.
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// Please check http://crbug.com/1215096 for updates which may help remove
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// this hack.
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GURL url = web_frame->GetDocument().Url();
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if (!url.IsAboutBlank()) {
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has_delayed_node_initialization_ = true;
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return;
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}
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}
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has_delayed_node_initialization_ = false;
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auto* isolate = context->GetIsolate();
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v8::MicrotasksScope microtasks_scope(
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isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
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if (ShouldNotifyClient(world_id))
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renderer_client_->DidCreateScriptContext(context, render_frame_);
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auto prefs = render_frame_->GetBlinkPreferences();
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bool use_context_isolation = prefs.context_isolation;
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// This logic matches the EXPLAINED logic in electron_renderer_client.cc
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// to avoid explaining it twice go check that implementation in
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// DidCreateScriptContext();
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bool is_main_world = IsMainWorld(world_id);
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bool is_main_frame = render_frame_->IsMainFrame();
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bool allow_node_in_sub_frames = prefs.node_integration_in_sub_frames;
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bool should_create_isolated_context =
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use_context_isolation && is_main_world &&
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(is_main_frame || allow_node_in_sub_frames);
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if (should_create_isolated_context) {
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CreateIsolatedWorldContext();
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if (!renderer_client_->IsWebViewFrame(context, render_frame_))
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renderer_client_->SetupMainWorldOverrides(context, render_frame_);
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}
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}
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void ElectronRenderFrameObserver::DraggableRegionsChanged() {
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blink::WebVector<blink::WebDraggableRegion> webregions =
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render_frame_->GetWebFrame()->GetDocument().DraggableRegions();
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std::vector<mojom::DraggableRegionPtr> regions;
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for (auto& webregion : webregions) {
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auto region = mojom::DraggableRegion::New();
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render_frame_->ConvertViewportToWindow(&webregion.bounds);
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region->bounds = webregion.bounds;
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region->draggable = webregion.draggable;
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regions.push_back(std::move(region));
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}
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mojo::AssociatedRemote<mojom::ElectronBrowser> browser_remote;
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render_frame_->GetRemoteAssociatedInterfaces()->GetInterface(&browser_remote);
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browser_remote->UpdateDraggableRegions(std::move(regions));
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}
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void ElectronRenderFrameObserver::WillReleaseScriptContext(
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v8::Local<v8::Context> context,
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int world_id) {
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if (ShouldNotifyClient(world_id))
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renderer_client_->WillReleaseScriptContext(context, render_frame_);
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}
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void ElectronRenderFrameObserver::OnDestruct() {
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delete this;
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}
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void ElectronRenderFrameObserver::DidMeaningfulLayout(
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blink::WebMeaningfulLayout layout_type) {
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if (layout_type == blink::WebMeaningfulLayout::kVisuallyNonEmpty) {
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mojo::AssociatedRemote<mojom::ElectronBrowser> browser_remote;
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render_frame_->GetRemoteAssociatedInterfaces()->GetInterface(
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&browser_remote);
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browser_remote->OnFirstNonEmptyLayout();
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}
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}
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void ElectronRenderFrameObserver::CreateIsolatedWorldContext() {
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auto* frame = render_frame_->GetWebFrame();
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blink::WebIsolatedWorldInfo info;
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// This maps to the name shown in the context combo box in the Console tab
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// of the dev tools.
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info.human_readable_name =
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blink::WebString::FromUTF8("Electron Isolated Context");
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// Setup document's origin policy in isolated world
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info.security_origin = frame->GetDocument().GetSecurityOrigin();
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blink::SetIsolatedWorldInfo(WorldIDs::ISOLATED_WORLD_ID, info);
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// Create initial script context in isolated world
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blink::WebScriptSource source("void 0");
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frame->ExecuteScriptInIsolatedWorld(
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WorldIDs::ISOLATED_WORLD_ID, source,
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blink::BackForwardCacheAware::kPossiblyDisallow);
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}
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bool ElectronRenderFrameObserver::IsMainWorld(int world_id) {
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return world_id == WorldIDs::MAIN_WORLD_ID;
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}
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bool ElectronRenderFrameObserver::IsIsolatedWorld(int world_id) {
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return world_id == WorldIDs::ISOLATED_WORLD_ID;
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}
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bool ElectronRenderFrameObserver::ShouldNotifyClient(int world_id) {
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auto prefs = render_frame_->GetBlinkPreferences();
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// This is necessary because if an iframe is created and a source is not
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// set, the iframe loads about:blank and creates a script context for the
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// same. We don't want to create a Node.js environment here because if the src
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// is later set, the JS necessary to do that triggers illegal access errors
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// when the initial about:blank Node.js environment is cleaned up. See:
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// https://source.chromium.org/chromium/chromium/src/+/main:content/renderer/render_frame_impl.h;l=870-892;drc=4b6001440a18740b76a1c63fa2a002cc941db394
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GURL url = render_frame_->GetWebFrame()->GetDocument().Url();
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bool allow_node_in_sub_frames = prefs.node_integration_in_sub_frames;
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if (allow_node_in_sub_frames && url.IsAboutBlank() &&
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!render_frame_->IsMainFrame())
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return false;
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if (prefs.context_isolation &&
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(render_frame_->IsMainFrame() || allow_node_in_sub_frames))
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return IsIsolatedWorld(world_id);
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return IsMainWorld(world_id);
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}
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} // namespace electron
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