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- // Copyright (c) 2012 The Chromium Authors. All rights reserved.
- // Use of this source code is governed by a BSD-style license that can be
- // found in the LICENSE file.
- #include "android_webview/renderer/aw_render_view_ext.h"
- #include <map>
- #include "android_webview/common/mojom/frame.mojom.h"
- #include "base/containers/contains.h"
- #include "base/no_destructor.h"
- #include "content/public/renderer/render_frame.h"
- #include "third_party/blink/public/common/associated_interfaces/associated_interface_provider.h"
- #include "third_party/blink/public/web/web_local_frame.h"
- #include "third_party/blink/public/web/web_view.h"
- namespace android_webview {
- // Registry for blink::WebView => AwRenderViewExt lookups
- typedef std::map<blink::WebView*, AwRenderViewExt*> ViewExtMap;
- ViewExtMap* GetViewExtMap() {
- static base::NoDestructor<ViewExtMap> map;
- return map.get();
- }
- AwRenderViewExt::AwRenderViewExt(blink::WebView* web_view,
- bool created_by_renderer)
- : blink::WebViewObserver(web_view),
- created_by_renderer_(created_by_renderer) {
- DCHECK(web_view != nullptr);
- DCHECK(!base::Contains(*GetViewExtMap(), web_view));
- GetViewExtMap()->emplace(web_view, this);
- }
- AwRenderViewExt::~AwRenderViewExt() {
- // Remove myself from the blink::WebView => AwRenderViewExt register. Ideally,
- // we'd just use GetWebView() and erase by key. However, by this time the
- // GetWebView has already been cleared so we have to iterate over all
- // WebViews in the map and wipe the one(s) that point to this
- // AwRenderViewExt
- auto* map = GetViewExtMap();
- auto it = map->begin();
- while (it != map->end()) {
- if (it->second == this) {
- it = map->erase(it);
- } else {
- ++it;
- }
- }
- }
- // static
- void AwRenderViewExt::WebViewCreated(blink::WebView* web_view,
- bool created_by_renderer) {
- new AwRenderViewExt(web_view,
- created_by_renderer); // |web_view| takes ownership.
- }
- // static
- AwRenderViewExt* AwRenderViewExt::FromWebView(blink::WebView* web_view) {
- DCHECK(web_view != nullptr);
- auto iter = GetViewExtMap()->find(web_view);
- DCHECK(GetViewExtMap()->end() != iter)
- << "AwRenderViewExt should always exist for a WebView";
- AwRenderViewExt* render_view_ext = iter->second;
- return render_view_ext;
- }
- void AwRenderViewExt::DidCommitCompositorFrame() {
- UpdateContentsSize();
- }
- void AwRenderViewExt::DidUpdateMainFrameLayout() {
- // The size may have changed.
- needs_contents_size_update_ = true;
- }
- void AwRenderViewExt::OnDestruct() {
- delete this;
- }
- void AwRenderViewExt::UpdateContentsSize() {
- blink::WebView* webview = GetWebView();
- blink::WebFrame* main_frame = webview->MainFrame();
- // Even without out-of-process iframes, we now create RemoteFrames for the
- // main frame when you navigate cross-process, to create a placeholder in the
- // old process. This is necessary to support things like postMessage across
- // windows that have references to each other. The RemoteFrame will
- // immediately go away if there aren't any active frames left in the old
- // process.
- if (!main_frame->IsWebLocalFrame())
- return;
- if (!needs_contents_size_update_)
- return;
- needs_contents_size_update_ = false;
- gfx::Size contents_size = main_frame->ToWebLocalFrame()->DocumentSize();
- // Fall back to contentsPreferredMinimumSize if the mainFrame is reporting a
- // 0x0 size (this happens during initial load).
- if (contents_size.IsEmpty()) {
- contents_size = webview->ContentsPreferredMinimumSize();
- }
- if (contents_size == last_sent_contents_size_)
- return;
- last_sent_contents_size_ = contents_size;
- mojo::AssociatedRemote<mojom::FrameHost> frame_host_remote;
- content::RenderFrame::FromWebFrame(main_frame->ToWebLocalFrame())
- ->GetRemoteAssociatedInterfaces()
- ->GetInterface(&frame_host_remote);
- frame_host_remote->ContentsSizeChanged(contents_size);
- }
- } // namespace android_webview
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