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// Copyright 2016 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 "third_party/blink/renderer/core/exported/web_input_method_controller_impl.h"
#include "third_party/blink/public/platform/web_rect.h"
#include "third_party/blink/public/platform/web_string.h"
#include "third_party/blink/public/platform/web_vector.h"
#include "third_party/blink/public/web/web_plugin.h"
#include "third_party/blink/public/web/web_range.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/dom/user_gesture_indicator.h"
#include "third_party/blink/renderer/core/editing/editing_utilities.h"
#include "third_party/blink/renderer/core/editing/editor.h"
#include "third_party/blink/renderer/core/editing/ephemeral_range.h"
#include "third_party/blink/renderer/core/editing/frame_selection.h"
#include "third_party/blink/renderer/core/editing/ime/ime_text_span_vector_builder.h"
#include "third_party/blink/renderer/core/editing/ime/input_method_controller.h"
#include "third_party/blink/renderer/core/editing/plain_text_range.h"
#include "third_party/blink/renderer/core/exported/web_plugin_container_impl.h"
#include "third_party/blink/renderer/core/frame/local_frame.h"
#include "third_party/blink/renderer/core/frame/web_local_frame_impl.h"
#include "third_party/blink/renderer/core/input_type_names.h"
#include "third_party/blink/renderer/core/page/focus_controller.h"
#include "third_party/blink/renderer/core/page/page.h"
namespace blink {
WebInputMethodControllerImpl::WebInputMethodControllerImpl(
WebLocalFrameImpl& web_frame)
: web_frame_(&web_frame) {}
WebInputMethodControllerImpl::~WebInputMethodControllerImpl() = default;
void WebInputMethodControllerImpl::Trace(blink::Visitor* visitor) {
visitor->Trace(web_frame_);
}
bool WebInputMethodControllerImpl::SetComposition(
const WebString& text,
const WebVector<WebImeTextSpan>& ime_text_spans,
const WebRange& replacement_range,
int selection_start,
int selection_end) {
if (WebPlugin* plugin = FocusedPluginIfInputMethodSupported()) {
return plugin->SetComposition(text, ime_text_spans, replacement_range,
selection_start, selection_end);
}
// We should use this |editor| object only to complete the ongoing
// composition.
if (!GetFrame()->GetEditor().CanEdit() &&
!GetInputMethodController().HasComposition())
return false;
// Select the range to be replaced with the composition later.
if (!replacement_range.IsNull()) {
web_frame_->SelectRange(replacement_range,
WebLocalFrame::kHideSelectionHandle,
blink::mojom::SelectionMenuBehavior::kHide);
}
// We should verify the parent node of this IME composition node are
// editable because JavaScript may delete a parent node of the composition
// node. In this case, WebKit crashes while deleting texts from the parent
// node, which doesn't exist any longer.
const EphemeralRange range =
GetInputMethodController().CompositionEphemeralRange();
if (range.IsNotNull()) {
Node* node = range.StartPosition().ComputeContainerNode();
GetFrame()->GetDocument()->UpdateStyleAndLayoutTree();
if (!node || !HasEditableStyle(*node))
return false;
}
std::unique_ptr<UserGestureIndicator> gesture_indicator =
LocalFrame::NotifyUserActivation(GetFrame(),
UserGestureToken::kNewGesture);
GetInputMethodController().SetComposition(
String(text), ImeTextSpanVectorBuilder::Build(ime_text_spans),
selection_start, selection_end);
return text.IsEmpty() ||
(GetFrame() && GetInputMethodController().HasComposition());
}
bool WebInputMethodControllerImpl::FinishComposingText(
ConfirmCompositionBehavior selection_behavior) {
// TODO(ekaramad): Here and in other IME calls we should expect the
// call to be made when our frame is focused. This, however, is not the case
// all the time. For instance, resetInputMethod call on RenderViewImpl could
// be after losing the focus on frame. But since we return the core frame
// in WebViewImpl::focusedLocalFrameInWidget(), we will reach here with
// |web_frame_| not focused on page.
if (WebPlugin* plugin = FocusedPluginIfInputMethodSupported())
return plugin->FinishComposingText(selection_behavior);
// TODO(editing-dev): The use of UpdateStyleAndLayout
// needs to be audited. See http://crbug.com/590369 for more details.
GetFrame()->GetDocument()->UpdateStyleAndLayout();
return GetInputMethodController().FinishComposingText(
selection_behavior == WebInputMethodController::kKeepSelection
? InputMethodController::kKeepSelection
: InputMethodController::kDoNotKeepSelection);
}
bool WebInputMethodControllerImpl::CommitText(
const WebString& text,
const WebVector<WebImeTextSpan>& ime_text_spans,
const WebRange& replacement_range,
int relative_caret_position) {
std::unique_ptr<UserGestureIndicator> gesture_indicator =
LocalFrame::NotifyUserActivation(GetFrame(),
UserGestureToken::kNewGesture);
if (WebPlugin* plugin = FocusedPluginIfInputMethodSupported()) {
return plugin->CommitText(text, ime_text_spans, replacement_range,
relative_caret_position);
}
// TODO(editing-dev): The use of UpdateStyleAndLayout
// needs to be audited. See http://crbug.com/590369 for more details.
GetFrame()->GetDocument()->UpdateStyleAndLayout();
if (!replacement_range.IsNull()) {
return GetInputMethodController().ReplaceText(
text, PlainTextRange(replacement_range.StartOffset(),
replacement_range.EndOffset()));
}
return GetInputMethodController().CommitText(
text, ImeTextSpanVectorBuilder::Build(ime_text_spans),
relative_caret_position);
}
WebTextInputInfo WebInputMethodControllerImpl::TextInputInfo() {
return GetFrame()->GetInputMethodController().TextInputInfo();
}
int WebInputMethodControllerImpl::ComputeWebTextInputNextPreviousFlags() {
return GetFrame()
->GetInputMethodController()
.ComputeWebTextInputNextPreviousFlags();
}
WebTextInputType WebInputMethodControllerImpl::TextInputType() {
return GetFrame()->GetInputMethodController().TextInputType();
}
WebRange WebInputMethodControllerImpl::CompositionRange() {
EphemeralRange range =
GetFrame()->GetInputMethodController().CompositionEphemeralRange();
if (range.IsNull())
return WebRange();
Element* editable =
GetFrame()->Selection().RootEditableElementOrDocumentElement();
editable->GetDocument().UpdateStyleAndLayout();
return PlainTextRange::Create(*editable, range);
}
bool WebInputMethodControllerImpl::GetCompositionCharacterBounds(
WebVector<WebRect>& bounds) {
WebRange range = CompositionRange();
if (range.IsEmpty())
return false;
size_t character_count = range.length();
size_t offset = range.StartOffset();
WebVector<WebRect> result(character_count);
WebRect webrect;
for (size_t i = 0; i < character_count; ++i) {
if (!web_frame_->FirstRectForCharacterRange(offset + i, 1, webrect)) {
DLOG(ERROR) << "Could not retrieve character rectangle at " << i;
return false;
}
result[i] = webrect;
}
bounds.Swap(result);
return true;
}
WebRange WebInputMethodControllerImpl::GetSelectionOffsets() const {
// TODO(editing-dev): The use of UpdateStyleAndLayout
// needs to be audited. See http://crbug.com/590369 for more details.
GetFrame()->GetDocument()->UpdateStyleAndLayout();
return GetFrame()->GetInputMethodController().GetSelectionOffsets();
}
LocalFrame* WebInputMethodControllerImpl::GetFrame() const {
return web_frame_->GetFrame();
}
InputMethodController& WebInputMethodControllerImpl::GetInputMethodController()
const {
DCHECK(GetFrame());
return GetFrame()->GetInputMethodController();
}
WebPlugin* WebInputMethodControllerImpl::FocusedPluginIfInputMethodSupported()
const {
WebPluginContainerImpl* container = GetFrame()->GetWebPluginContainer();
if (container && container->SupportsInputMethod()) {
return container->Plugin();
}
return nullptr;
}
} // namespace blink
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