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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/input_method/candidate_window_controller_impl.h"
#include <string>
#include <vector>
#include "ash/public/cpp/shell_window_ids.h"
#include "ash/shell.h"
#include "ash/wm/window_util.h"
#include "base/logging.h"
#include "chrome/browser/ui/ash/input_method/infolist_window.h"
#include "ui/base/ime/ash/ime_bridge.h"
#include "ui/views/widget/widget.h"
namespace ash {
namespace input_method {
CandidateWindowControllerImpl::CandidateWindowControllerImpl() {
IMEBridge::Get()->SetCandidateWindowHandler(this);
}
CandidateWindowControllerImpl::~CandidateWindowControllerImpl() {
IMEBridge::Get()->SetCandidateWindowHandler(nullptr);
if (candidate_window_view_) {
candidate_window_view_->RemoveObserver(this);
candidate_window_view_->GetWidget()->RemoveObserver(this);
}
CHECK(!IsInObserverList());
}
void CandidateWindowControllerImpl::InitCandidateWindowView() {
if (candidate_window_view_) {
return;
}
gfx::NativeView parent = gfx::NativeView();
aura::Window* active_window = ash::window_util::GetActiveWindow();
// Use MenuContainer so that it works even with a system modal dialog.
parent = ash::Shell::GetContainer(
active_window ? active_window->GetRootWindow()
: ash::Shell::GetRootWindowForNewWindows(),
ash::kShellWindowId_MenuContainer);
candidate_window_view_ = new ui::ime::CandidateWindowView(parent);
candidate_window_view_->AddObserver(this);
candidate_window_view_->SetCursorAndCompositionBounds(cursor_bounds_,
composition_bounds_);
views::Widget* widget = candidate_window_view_->InitWidget();
widget->AddObserver(this);
widget->Show();
for (auto& observer : observers_) {
observer.CandidateWindowOpened();
}
}
void CandidateWindowControllerImpl::Hide() {
if (candidate_window_view_) {
candidate_window_view_->GetWidget()->Close();
}
if (infolist_window_) {
infolist_window_->HideImmediately();
}
}
void CandidateWindowControllerImpl::SetCursorAndCompositionBounds(
const gfx::Rect& cursor_bounds,
const gfx::Rect& composition_bounds) {
// A workaround for http://crosbug.com/6460. We should ignore very short Y
// move to prevent the window from shaking up and down.
const int kKeepPositionThreshold = 2; // px
gfx::Rect last_bounds;
if (candidate_window_view_) {
last_bounds = candidate_window_view_->GetAnchorRect();
}
const int delta_y = abs(last_bounds.y() - cursor_bounds.y());
if ((last_bounds.x() == cursor_bounds.x()) &&
(delta_y <= kKeepPositionThreshold)) {
DVLOG(1) << "Ignored set_cursor_bounds signal to prevent window shake";
return;
}
cursor_bounds_ = cursor_bounds;
composition_bounds_ = composition_bounds;
// Remember the cursor bounds.
if (candidate_window_view_) {
candidate_window_view_->SetCursorAndCompositionBounds(cursor_bounds,
composition_bounds);
}
}
gfx::Rect CandidateWindowControllerImpl::GetCursorBounds() const {
return is_focused_ ? cursor_bounds_ : gfx::Rect();
}
void CandidateWindowControllerImpl::FocusStateChanged(bool is_focused) {
is_focused_ = is_focused;
if (candidate_window_view_) {
candidate_window_view_->HidePreeditText();
}
}
void CandidateWindowControllerImpl::HideLookupTable() {
// If it's not visible, hide the lookup table and return.
if (candidate_window_view_) {
candidate_window_view_->HideLookupTable();
}
if (infolist_window_) {
infolist_window_->HideImmediately();
}
// TODO(nona): Introduce unittests for crbug.com/170036.
latest_infolist_entries_.clear();
}
void CandidateWindowControllerImpl::UpdateLookupTable(
const ui::CandidateWindow& candidate_window) {
if (!candidate_window_view_) {
InitCandidateWindowView();
}
candidate_window_view_->UpdateCandidates(candidate_window);
candidate_window_view_->ShowLookupTable();
bool has_highlighted = false;
std::vector<ui::InfolistEntry> infolist_entries;
candidate_window.GetInfolistEntries(&infolist_entries, &has_highlighted);
// If there is no change, just return.
if (latest_infolist_entries_ == infolist_entries) {
return;
}
latest_infolist_entries_ = infolist_entries;
if (infolist_entries.empty()) {
if (infolist_window_) {
infolist_window_->HideImmediately();
}
return;
}
// Highlight moves out of the infolist entries.
if (!has_highlighted) {
if (infolist_window_) {
infolist_window_->HideWithDelay();
}
return;
}
if (infolist_window_) {
infolist_window_->Relayout(infolist_entries);
} else {
infolist_window_ =
new ui::ime::InfolistWindow(candidate_window_view_, infolist_entries);
infolist_window_->InitWidget();
infolist_window_->GetWidget()->AddObserver(this);
}
infolist_window_->ShowWithDelay();
}
void CandidateWindowControllerImpl::UpdatePreeditText(
const std::u16string& text,
unsigned int cursor,
bool visible) {
// If it's not visible, hide the preedit text and return.
if (!visible || text.empty()) {
if (candidate_window_view_) {
candidate_window_view_->HidePreeditText();
}
return;
}
if (!candidate_window_view_) {
InitCandidateWindowView();
}
candidate_window_view_->UpdatePreeditText(text);
candidate_window_view_->ShowPreeditText();
}
void CandidateWindowControllerImpl::OnCandidateCommitted(int index) {
for (auto& observer : observers_) {
observer.CandidateClicked(index);
}
}
void CandidateWindowControllerImpl::OnWidgetClosing(views::Widget* widget) {
if (infolist_window_ && widget == infolist_window_->GetWidget()) {
widget->RemoveObserver(this);
infolist_window_ = nullptr;
} else if (candidate_window_view_ &&
widget == candidate_window_view_->GetWidget()) {
widget->RemoveObserver(this);
candidate_window_view_->RemoveObserver(this);
candidate_window_view_ = nullptr;
for (auto& observer : observers_) {
observer.CandidateWindowClosed();
}
}
}
void CandidateWindowControllerImpl::AddObserver(
CandidateWindowController::Observer* observer) {
observers_.AddObserver(observer);
}
void CandidateWindowControllerImpl::RemoveObserver(
CandidateWindowController::Observer* observer) {
observers_.RemoveObserver(observer);
}
} // namespace input_method
} // namespace ash
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