| // 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 "content/renderer/text_input_client_observer.h" |
| |
| #include <stddef.h> |
| |
| #include <memory> |
| |
| #include "build/build_config.h" |
| #include "content/common/text_input_client_messages.h" |
| #include "content/renderer/pepper/pepper_plugin_instance_impl.h" |
| #include "content/renderer/render_frame_impl.h" |
| #include "content/renderer/render_view_impl.h" |
| #include "content/renderer/render_widget.h" |
| #include "ipc/ipc_message.h" |
| #include "ppapi/buildflags/buildflags.h" |
| #include "third_party/blink/public/platform/web_point.h" |
| #include "third_party/blink/public/platform/web_rect.h" |
| #include "third_party/blink/public/platform/web_string.h" |
| #include "third_party/blink/public/web/web_local_frame.h" |
| #include "third_party/blink/public/web/web_view.h" |
| #include "ui/gfx/geometry/rect.h" |
| |
| #if defined(OS_MACOSX) |
| #include "third_party/blink/public/web/mac/web_substring_util.h" |
| #endif |
| |
| namespace content { |
| |
| namespace { |
| uint32_t GetCurrentCursorPositionInFrame(blink::WebLocalFrame* localFrame) { |
| blink::WebRange range = localFrame->SelectionRange(); |
| return range.IsNull() ? 0U : static_cast<uint32_t>(range.StartOffset()); |
| } |
| } |
| |
| TextInputClientObserver::TextInputClientObserver(RenderWidget* render_widget) |
| : render_widget_(render_widget) {} |
| |
| TextInputClientObserver::~TextInputClientObserver() { |
| } |
| |
| bool TextInputClientObserver::OnMessageReceived(const IPC::Message& message) { |
| bool handled = true; |
| IPC_BEGIN_MESSAGE_MAP(TextInputClientObserver, message) |
| IPC_MESSAGE_HANDLER(TextInputClientMsg_StringAtPoint, |
| OnStringAtPoint) |
| IPC_MESSAGE_HANDLER(TextInputClientMsg_CharacterIndexForPoint, |
| OnCharacterIndexForPoint) |
| IPC_MESSAGE_HANDLER(TextInputClientMsg_FirstRectForCharacterRange, |
| OnFirstRectForCharacterRange) |
| IPC_MESSAGE_HANDLER(TextInputClientMsg_StringForRange, OnStringForRange) |
| IPC_MESSAGE_UNHANDLED(handled = false) |
| IPC_END_MESSAGE_MAP() |
| return handled; |
| } |
| |
| bool TextInputClientObserver::Send(IPC::Message* message) { |
| return render_widget_->Send(message); |
| } |
| |
| blink::WebFrameWidget* TextInputClientObserver::GetWebFrameWidget() const { |
| blink::WebWidget* widget = render_widget_->GetWebWidget(); |
| if (!widget->IsWebFrameWidget()) { |
| // When a page navigation occurs, for a brief period |
| // RenderViewImpl::GetWebWidget() will return a WebViewImpl instead of a |
| // WebViewFrameWidget. Therefore, casting to WebFrameWidget is invalid and |
| // could cause crashes. Also, WebView::mainFrame() could be a remote frame |
| // which will yield a nullptr for localRoot() (https://crbug.com/664890). |
| return nullptr; |
| } |
| return static_cast<blink::WebFrameWidget*>(widget); |
| } |
| |
| blink::WebLocalFrame* TextInputClientObserver::GetFocusedFrame() const { |
| if (auto* frame_widget = GetWebFrameWidget()) { |
| blink::WebLocalFrame* localRoot = frame_widget->LocalRoot(); |
| RenderFrameImpl* render_frame = RenderFrameImpl::FromWebFrame(localRoot); |
| if (!render_frame) { |
| // TODO(ekaramad): Can this ever be nullptr? (https://crbug.com/664890). |
| return nullptr; |
| } |
| blink::WebLocalFrame* focused = |
| render_frame->render_view()->webview()->FocusedFrame(); |
| return focused->LocalRoot() == localRoot ? focused : nullptr; |
| } |
| return nullptr; |
| } |
| |
| #if BUILDFLAG(ENABLE_PLUGINS) |
| PepperPluginInstanceImpl* TextInputClientObserver::GetFocusedPepperPlugin() |
| const { |
| blink::WebLocalFrame* focusedFrame = GetFocusedFrame(); |
| return focusedFrame |
| ? RenderFrameImpl::FromWebFrame(focusedFrame) |
| ->focused_pepper_plugin() |
| : nullptr; |
| } |
| #endif |
| |
| void TextInputClientObserver::OnStringAtPoint(gfx::Point point) { |
| #if defined(OS_MACOSX) |
| blink::WebPoint baselinePoint; |
| NSAttributedString* string = nil; |
| |
| if (auto* frame_widget = GetWebFrameWidget()) { |
| string = blink::WebSubstringUtil::AttributedWordAtPoint(frame_widget, point, |
| baselinePoint); |
| } |
| |
| std::unique_ptr<const mac::AttributedStringCoder::EncodedString> encoded( |
| mac::AttributedStringCoder::Encode(string)); |
| Send(new TextInputClientReplyMsg_GotStringAtPoint( |
| render_widget_->routing_id(), *encoded.get(), baselinePoint)); |
| #else |
| NOTIMPLEMENTED(); |
| #endif |
| } |
| |
| void TextInputClientObserver::OnCharacterIndexForPoint(gfx::Point point) { |
| blink::WebPoint web_point(point); |
| uint32_t index = 0U; |
| if (auto* frame = GetFocusedFrame()) |
| index = static_cast<uint32_t>(frame->CharacterIndexForPoint(web_point)); |
| |
| Send(new TextInputClientReplyMsg_GotCharacterIndexForPoint( |
| render_widget_->routing_id(), index)); |
| } |
| |
| void TextInputClientObserver::OnFirstRectForCharacterRange(gfx::Range range) { |
| gfx::Rect rect; |
| #if BUILDFLAG(ENABLE_PLUGINS) |
| PepperPluginInstanceImpl* focused_plugin = GetFocusedPepperPlugin(); |
| if (focused_plugin) { |
| rect = focused_plugin->GetCaretBounds(); |
| } else |
| #endif |
| { |
| blink::WebLocalFrame* frame = GetFocusedFrame(); |
| // TODO(yabinh): Null check should not be necessary. |
| // See crbug.com/304341 |
| if (frame) { |
| blink::WebRect web_rect; |
| // When request range is invalid we will try to obtain it from current |
| // frame selection. The fallback value will be 0. |
| uint32_t start = range.IsValid() ? range.start() |
| : GetCurrentCursorPositionInFrame(frame); |
| frame->FirstRectForCharacterRange(start, range.length(), web_rect); |
| rect = web_rect; |
| } |
| } |
| Send(new TextInputClientReplyMsg_GotFirstRectForRange( |
| render_widget_->routing_id(), rect)); |
| } |
| |
| void TextInputClientObserver::OnStringForRange(gfx::Range range) { |
| #if defined(OS_MACOSX) |
| blink::WebPoint baselinePoint; |
| NSAttributedString* string = nil; |
| blink::WebLocalFrame* frame = GetFocusedFrame(); |
| // TODO(yabinh): Null check should not be necessary. |
| // See crbug.com/304341 |
| if (frame) { |
| string = blink::WebSubstringUtil::AttributedSubstringInRange( |
| frame, range.start(), range.length(), &baselinePoint); |
| } |
| std::unique_ptr<const mac::AttributedStringCoder::EncodedString> encoded( |
| mac::AttributedStringCoder::Encode(string)); |
| Send(new TextInputClientReplyMsg_GotStringForRange( |
| render_widget_->routing_id(), *encoded.get(), baselinePoint)); |
| #else |
| NOTIMPLEMENTED(); |
| #endif |
| } |
| |
| } // namespace content |