Move ash/ime to ui/chromeos/ime

ash/ime/candidate_window_view.cc

-// Copyright 2014 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 "ash/ime/candidate_window_view.h"
-
-#include <string>
-
-#include "ash/ime/candidate_view.h"
-#include "ash/ime/candidate_window_constants.h"
-#include "base/strings/utf_string_conversions.h"
-#include "ui/gfx/color_utils.h"
-#include "ui/gfx/screen.h"
-#include "ui/native_theme/native_theme.h"
-#include "ui/views/background.h"
-#include "ui/views/border.h"
-#include "ui/views/bubble/bubble_frame_view.h"
-#include "ui/views/controls/label.h"
-#include "ui/views/layout/box_layout.h"
-#include "ui/views/layout/fill_layout.h"
-#include "ui/wm/core/window_animations.h"
-
-namespace ash {
-namespace ime {
-
-namespace {
-
-class CandidateWindowBorder : public views::BubbleBorder {
- public:
-  explicit CandidateWindowBorder(gfx::NativeView parent)
-      : views::BubbleBorder(views::BubbleBorder::TOP_CENTER,
-                            views::BubbleBorder::NO_SHADOW,
-                            SK_ColorTRANSPARENT),
-        parent_(parent),
-        offset_(0) {
-    set_paint_arrow(views::BubbleBorder::PAINT_NONE);
-  }
-  ~CandidateWindowBorder() override {}
-
-  void set_offset(int offset) { offset_ = offset; }
-
- private:
-  // Overridden from views::BubbleBorder:
-  gfx::Rect GetBounds(const gfx::Rect& anchor_rect,
-                      const gfx::Size& content_size) const override {
-    gfx::Rect bounds(content_size);
-    bounds.set_origin(gfx::Point(
-        anchor_rect.x() - offset_,
-        is_arrow_on_top(arrow()) ?
-        anchor_rect.bottom() : anchor_rect.y() - content_size.height()));
-
-    // It cannot use the normal logic of arrow offset for horizontal offscreen,
-    // because the arrow must be in the content's edge. But CandidateWindow has
-    // to be visible even when |anchor_rect| is out of the screen.
-    gfx::Rect work_area = gfx::Screen::GetNativeScreen()->
-        GetDisplayNearestWindow(parent_).work_area();
-    if (bounds.right() > work_area.right())
-      bounds.set_x(work_area.right() - bounds.width());
-    if (bounds.x() < work_area.x())
-      bounds.set_x(work_area.x());
-
-    return bounds;
-  }
-
-  gfx::Insets GetInsets() const override { return gfx::Insets(); }
-
-  gfx::NativeView parent_;
-  int offset_;
-
-  DISALLOW_COPY_AND_ASSIGN(CandidateWindowBorder);
-};
-
-// Computes the page index. For instance, if the page size is 9, and the
-// cursor is pointing to 13th candidate, the page index will be 1 (2nd
-// page, as the index is zero-origin). Returns -1 on error.
-int ComputePageIndex(const ui::CandidateWindow& candidate_window) {
-  if (candidate_window.page_size() > 0)
-    return candidate_window.cursor_position() / candidate_window.page_size();
-  return -1;
-}
-
-}  // namespace
-
-class InformationTextArea : public views::View {
- public:
-  // InformationTextArea's border is drawn as a separator, it should appear
-  // at either top or bottom.
-  enum BorderPosition {
-    TOP,
-    BOTTOM
-  };
-
-  // Specify the alignment and initialize the control.
-  InformationTextArea(gfx::HorizontalAlignment align, int min_width)
-      : min_width_(min_width) {
-    label_ = new views::Label;
-    label_->SetHorizontalAlignment(align);
-    label_->SetBorder(views::Border::CreateEmptyBorder(2, 2, 2, 4));
-
-    SetLayoutManager(new views::FillLayout());
-    AddChildView(label_);
-    set_background(views::Background::CreateSolidBackground(
-        color_utils::AlphaBlend(SK_ColorBLACK,
-                                GetNativeTheme()->GetSystemColor(
-                                    ui::NativeTheme::kColorId_WindowBackground),
-                                0x10)));
-  }
-
-  // Sets the text alignment.
-  void SetAlignment(gfx::HorizontalAlignment alignment) {
-    label_->SetHorizontalAlignment(alignment);
-  }
-
-  // Sets the displayed text.
-  void SetText(const base::string16& text) {
-    label_->SetText(text);
-  }
-
-  // Sets the border thickness for top/bottom.
-  void SetBorderFromPosition(BorderPosition position) {
-    SetBorder(views::Border::CreateSolidSidedBorder(
-        (position == TOP) ? 1 : 0,
-        0,
-        (position == BOTTOM) ? 1 : 0,
-        0,
-        GetNativeTheme()->GetSystemColor(
-            ui::NativeTheme::kColorId_MenuBorderColor)));
-  }
-
- protected:
-  gfx::Size GetPreferredSize() const override {
-    gfx::Size size = views::View::GetPreferredSize();
-    size.SetToMax(gfx::Size(min_width_, 0));
-    return size;
-  }
-
- private:
-  views::Label* label_;
-  int min_width_;
-
-  DISALLOW_COPY_AND_ASSIGN(InformationTextArea);
-};
-
-CandidateWindowView::CandidateWindowView(gfx::NativeView parent)
-    : selected_candidate_index_in_page_(-1),
-      should_show_at_composition_head_(false),
-      should_show_upper_side_(false),
-      was_candidate_window_open_(false) {
-  set_can_activate(false);
-  set_parent_window(parent);
-  set_margins(gfx::Insets());
-
-  // Set the background and the border of the view.
-  ui::NativeTheme* theme = GetNativeTheme();
-  set_background(
-      views::Background::CreateSolidBackground(theme->GetSystemColor(
-          ui::NativeTheme::kColorId_WindowBackground)));
-  SetBorder(views::Border::CreateSolidBorder(
-      1, theme->GetSystemColor(ui::NativeTheme::kColorId_MenuBorderColor)));
-
-  SetLayoutManager(new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 0));
-  auxiliary_text_ = new InformationTextArea(gfx::ALIGN_RIGHT, 0);
-  preedit_ = new InformationTextArea(gfx::ALIGN_LEFT, kMinPreeditAreaWidth);
-  candidate_area_ = new views::View;
-  auxiliary_text_->SetVisible(false);
-  preedit_->SetVisible(false);
-  candidate_area_->SetVisible(false);
-  preedit_->SetBorderFromPosition(InformationTextArea::BOTTOM);
-  if (candidate_window_.orientation() == ui::CandidateWindow::VERTICAL) {
-    AddChildView(preedit_);
-    AddChildView(candidate_area_);
-    AddChildView(auxiliary_text_);
-    auxiliary_text_->SetBorderFromPosition(InformationTextArea::TOP);
-    candidate_area_->SetLayoutManager(new views::BoxLayout(
-        views::BoxLayout::kVertical, 0, 0, 0));
-  } else {
-    AddChildView(preedit_);
-    AddChildView(auxiliary_text_);
-    AddChildView(candidate_area_);
-    auxiliary_text_->SetAlignment(gfx::ALIGN_LEFT);
-    auxiliary_text_->SetBorderFromPosition(InformationTextArea::BOTTOM);
-    candidate_area_->SetLayoutManager(new views::BoxLayout(
-        views::BoxLayout::kHorizontal, 0, 0, 0));
-  }
-}
-
-CandidateWindowView::~CandidateWindowView() {
-}
-
-views::Widget* CandidateWindowView::InitWidget() {
-  views::Widget* widget = BubbleDelegateView::CreateBubble(this);
-
-  wm::SetWindowVisibilityAnimationType(
-      widget->GetNativeView(),
-      wm::WINDOW_VISIBILITY_ANIMATION_TYPE_FADE);
-
-  GetBubbleFrameView()->SetBubbleBorder(scoped_ptr<views::BubbleBorder>(
-      new CandidateWindowBorder(parent_window())));
-  return widget;
-}
-
-void CandidateWindowView::UpdateVisibility() {
-  if (candidate_area_->visible() || auxiliary_text_->visible() ||
-      preedit_->visible()) {
-    SizeToContents();
-  } else {
-    GetWidget()->Close();
-  }
-}
-
-void CandidateWindowView::HideLookupTable() {
-  candidate_area_->SetVisible(false);
-  auxiliary_text_->SetVisible(false);
-  UpdateVisibility();
-}
-
-void CandidateWindowView::HidePreeditText() {
-  preedit_->SetVisible(false);
-  UpdateVisibility();
-}
-
-void CandidateWindowView::ShowPreeditText() {
-  preedit_->SetVisible(true);
-  UpdateVisibility();
-}
-
-void CandidateWindowView::UpdatePreeditText(const base::string16& text) {
-  preedit_->SetText(text);
-}
-
-void CandidateWindowView::ShowLookupTable() {
-  candidate_area_->SetVisible(true);
-  auxiliary_text_->SetVisible(candidate_window_.is_auxiliary_text_visible());
-  UpdateVisibility();
-}
-
-void CandidateWindowView::UpdateCandidates(
-    const ui::CandidateWindow& new_candidate_window) {
-  // Updating the candidate views is expensive. We'll skip this if possible.
-  if (!candidate_window_.IsEqual(new_candidate_window)) {
-    if (candidate_window_.orientation() != new_candidate_window.orientation()) {
-      // If the new layout is vertical, the aux text should appear at the
-      // bottom. If horizontal, it should appear between preedit and candidates.
-      if (new_candidate_window.orientation() == ui::CandidateWindow::VERTICAL) {
-        ReorderChildView(auxiliary_text_, -1);
-        auxiliary_text_->SetAlignment(gfx::ALIGN_RIGHT);
-        auxiliary_text_->SetBorderFromPosition(InformationTextArea::TOP);
-        candidate_area_->SetLayoutManager(new views::BoxLayout(
-            views::BoxLayout::kVertical, 0, 0, 0));
-      } else {
-        ReorderChildView(auxiliary_text_, 1);
-        auxiliary_text_->SetAlignment(gfx::ALIGN_LEFT);
-        auxiliary_text_->SetBorderFromPosition(InformationTextArea::BOTTOM);
-        candidate_area_->SetLayoutManager(new views::BoxLayout(
-            views::BoxLayout::kHorizontal, 0, 0, 0));
-      }
-    }
-
-    // Initialize candidate views if necessary.
-    MaybeInitializeCandidateViews(new_candidate_window);
-
-    should_show_at_composition_head_
-        = new_candidate_window.show_window_at_composition();
-    // Compute the index of the current page.
-    const int current_page_index = ComputePageIndex(new_candidate_window);
-    if (current_page_index < 0)
-      return;
-
-    // Update the candidates in the current page.
-    const size_t start_from =
-        current_page_index * new_candidate_window.page_size();
-
-    int max_shortcut_width = 0;
-    int max_candidate_width = 0;
-    for (size_t i = 0; i < candidate_views_.size(); ++i) {
-      const size_t index_in_page = i;
-      const size_t candidate_index = start_from + index_in_page;
-      CandidateView* candidate_view = candidate_views_[index_in_page];
-      // Set the candidate text.
-      if (candidate_index < new_candidate_window.candidates().size()) {
-        const ui::CandidateWindow::Entry& entry =
-            new_candidate_window.candidates()[candidate_index];
-        candidate_view->SetEntry(entry);
-        candidate_view->SetEnabled(true);
-        candidate_view->SetInfolistIcon(!entry.description_title.empty());
-      } else {
-        // Disable the empty row.
-        candidate_view->SetEntry(ui::CandidateWindow::Entry());
-        candidate_view->SetEnabled(false);
-        candidate_view->SetInfolistIcon(false);
-      }
-      if (new_candidate_window.orientation() == ui::CandidateWindow::VERTICAL) {
-        int shortcut_width = 0;
-        int candidate_width = 0;
-        candidate_views_[i]->GetPreferredWidths(
-            &shortcut_width, &candidate_width);
-        max_shortcut_width = std::max(max_shortcut_width, shortcut_width);
-        max_candidate_width = std::max(max_candidate_width, candidate_width);
-      }
-    }
-    if (new_candidate_window.orientation() == ui::CandidateWindow::VERTICAL) {
-      for (size_t i = 0; i < candidate_views_.size(); ++i)
-        candidate_views_[i]->SetWidths(max_shortcut_width, max_candidate_width);
-    }
-
-    CandidateWindowBorder* border = static_cast<CandidateWindowBorder*>(
-        GetBubbleFrameView()->bubble_border());
-    if (new_candidate_window.orientation() == ui::CandidateWindow::VERTICAL)
-      border->set_offset(max_shortcut_width);
-    else
-      border->set_offset(0);
-  }
-  // Update the current candidate window. We'll use candidate_window_ from here.
-  // Note that SelectCandidateAt() uses candidate_window_.
-  candidate_window_.CopyFrom(new_candidate_window);
-
-  // Select the current candidate in the page.
-  if (candidate_window_.is_cursor_visible()) {
-    if (candidate_window_.page_size()) {
-      const int current_candidate_in_page =
-          candidate_window_.cursor_position() % candidate_window_.page_size();
-      SelectCandidateAt(current_candidate_in_page);
-    }
-  } else {
-    // Unselect the currently selected candidate.
-    if (0 <= selected_candidate_index_in_page_ &&
-        static_cast<size_t>(selected_candidate_index_in_page_) <
-        candidate_views_.size()) {
-      candidate_views_[selected_candidate_index_in_page_]->SetHighlighted(
-          false);
-      selected_candidate_index_in_page_ = -1;
-    }
-  }
-
-  // Updates auxiliary text
-  auxiliary_text_->SetVisible(candidate_window_.is_auxiliary_text_visible());
-  auxiliary_text_->SetText(base::UTF8ToUTF16(
-      candidate_window_.auxiliary_text()));
-}
-
-void CandidateWindowView::SetCursorBounds(const gfx::Rect& cursor_bounds,
-                                          const gfx::Rect& composition_head) {
-  if (candidate_window_.show_window_at_composition())
-    SetAnchorRect(composition_head);
-  else
-    SetAnchorRect(cursor_bounds);
-}
-
-void CandidateWindowView::MaybeInitializeCandidateViews(
-    const ui::CandidateWindow& candidate_window) {
-  const ui::CandidateWindow::Orientation orientation =
-      candidate_window.orientation();
-  const size_t page_size = candidate_window.page_size();
-
-  // Reset all candidate_views_ when orientation changes.
-  if (orientation != candidate_window_.orientation())
-    STLDeleteElements(&candidate_views_);
-
-  while (page_size < candidate_views_.size()) {
-    delete candidate_views_.back();
-    candidate_views_.pop_back();
-  }
-  while (page_size > candidate_views_.size()) {
-    CandidateView* new_candidate = new CandidateView(this, orientation);
-    candidate_area_->AddChildView(new_candidate);
-    candidate_views_.push_back(new_candidate);
-  }
-}
-
-void CandidateWindowView::SelectCandidateAt(int index_in_page) {
-  const int current_page_index = ComputePageIndex(candidate_window_);
-  if (current_page_index < 0) {
-    return;
-  }
-
-  const int cursor_absolute_index =
-      candidate_window_.page_size() * current_page_index + index_in_page;
-  // Ignore click on out of range views.
-  if (cursor_absolute_index < 0 ||
-      candidate_window_.candidates().size() <=
-      static_cast<size_t>(cursor_absolute_index)) {
-    return;
-  }
-
-  // Remember the currently selected candidate index in the current page.
-  selected_candidate_index_in_page_ = index_in_page;
-
-  // Select the candidate specified by index_in_page.
-  candidate_views_[index_in_page]->SetHighlighted(true);
-
-  // Update the cursor indexes in the model.
-  candidate_window_.set_cursor_position(cursor_absolute_index);
-}
-
-void CandidateWindowView::ButtonPressed(views::Button* sender,
-                                        const ui::Event& event) {
-  for (size_t i = 0; i < candidate_views_.size(); ++i) {
-    if (sender == candidate_views_[i]) {
-      FOR_EACH_OBSERVER(Observer, observers_, OnCandidateCommitted(i));
-      return;
-    }
-  }
-}
-
-}  // namespace ime
-}  // namespace ash