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// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/shelf/window_preview.h"
#include "ash/public/cpp/shelf_config.h"
#include "ash/resources/vector_icons/vector_icons.h"
#include "ash/wm/window_preview_view.h"
#include "ash/wm/window_util.h"
#include "base/functional/bind.h"
#include "ui/aura/window.h"
#include "ui/color/color_id.h"
#include "ui/color/color_provider.h"
#include "ui/gfx/color_palette.h"
#include "ui/gfx/paint_vector_icon.h"
#include "ui/views/background.h"
#include "ui/views/controls/button/image_button.h"
#include "ui/views/controls/label.h"
namespace ash {
// The margins around window titles.
constexpr int kTitleLineHeight = 20;
constexpr int kTitleMarginTop = 10;
constexpr int kTitleMarginBottom = 10;
constexpr int kTitleMarginRight = 16;
// The width and height of close buttons.
constexpr int kCloseButtonSize = 36;
constexpr int kCloseButtonImageSize = 24;
constexpr int kCloseButtonSideBleed = 8;
constexpr SkColor kCloseButtonColor = SK_ColorWHITE;
constexpr SkColor kPreviewContainerBgColor =
SkColorSetA(gfx::kGoogleGrey100, 0x24);
constexpr int kPreviewBorderRadius = 4;
WindowPreview::WindowPreview(aura::Window* window, Delegate* delegate)
: delegate_(delegate) {
preview_view_ = new WindowPreviewView(window);
preview_container_view_ = new views::View();
preview_container_view_->SetBackground(views::CreateRoundedRectBackground(
kPreviewContainerBgColor, kPreviewBorderRadius));
title_ = new views::Label(window->GetTitle());
close_button_ = new views::ImageButton(base::BindRepeating(
&WindowPreview::CloseButtonPressed, base::Unretained(this)));
close_button_->SetFocusBehavior(FocusBehavior::NEVER);
AddChildView(preview_container_view_.get());
AddChildView(preview_view_.get());
AddChildView(title_.get());
AddChildView(close_button_.get());
}
WindowPreview::~WindowPreview() = default;
gfx::Size WindowPreview::CalculatePreferredSize() const {
// The preview itself will always be strictly contained within its container,
// so only the container's size matters to calculate the preferred size.
const gfx::Size container_size = GetPreviewContainerSize();
const int title_height_with_padding =
kTitleLineHeight + kTitleMarginTop + kTitleMarginBottom;
return gfx::Size(container_size.width(),
container_size.height() + title_height_with_padding);
}
void WindowPreview::Layout() {
gfx::Rect content_rect = GetContentsBounds();
gfx::Size title_size = title_->CalculatePreferredSize();
int title_height_with_padding =
kTitleLineHeight + kTitleMarginTop + kTitleMarginBottom;
int title_width =
std::min(title_size.width(),
content_rect.width() - kCloseButtonSize - kTitleMarginRight);
title_->SetBoundsRect(gfx::Rect(content_rect.x(),
content_rect.y() + kTitleMarginTop,
title_width, kTitleLineHeight));
close_button_->SetBoundsRect(
gfx::Rect(content_rect.right() - kCloseButtonSize + kCloseButtonSideBleed,
content_rect.y(), kCloseButtonSize, kCloseButtonSize));
const gfx::Size container_size = GetPreviewContainerSize();
gfx::Size mirror_size = preview_view_->CalculatePreferredSize();
float preview_ratio = static_cast<float>(mirror_size.width()) /
static_cast<float>(mirror_size.height());
int preview_height = ShelfConfig::Get()->shelf_tooltip_preview_height();
int preview_width = preview_height * preview_ratio;
if (preview_ratio > ShelfConfig::Get()->shelf_tooltip_preview_max_ratio()) {
// Very wide window.
preview_width = ShelfConfig::Get()->shelf_tooltip_preview_max_width();
preview_height =
ShelfConfig::Get()->shelf_tooltip_preview_max_width() / preview_ratio;
}
// Center the actual preview over the container, horizontally and vertically.
gfx::Point preview_offset_from_container(
(container_size.width() - preview_width) / 2,
(container_size.height() - preview_height) / 2);
const int preview_container_top =
content_rect.y() + title_height_with_padding;
preview_container_view_->SetBoundsRect(
gfx::Rect(content_rect.x(), preview_container_top, container_size.width(),
container_size.height()));
preview_view_->SetBoundsRect(
gfx::Rect(content_rect.x() + preview_offset_from_container.x(),
preview_container_top + preview_offset_from_container.y(),
preview_width, preview_height));
}
bool WindowPreview::OnMousePressed(const ui::MouseEvent& event) {
if (!preview_view_->bounds().Contains(event.location()))
return false;
aura::Window* target = preview_view_->window();
if (target) {
// The window might have been closed in the mean time.
// TODO: Use WindowObserver to listen to when previewed windows are
// being closed and remove this condition.
wm::ActivateWindow(target);
// This will have the effect of deleting this view.
delegate_->OnPreviewActivated(this);
}
return true;
}
const char* WindowPreview::GetClassName() const {
return "WindowPreview";
}
void WindowPreview::OnThemeChanged() {
views::View::OnThemeChanged();
const auto* color_provider = GetColorProvider();
SkColor background_color =
color_provider->GetColor(ui::kColorTooltipBackground);
title_->SetEnabledColor(
color_provider->GetColor(ui::kColorTooltipForeground));
title_->SetBackgroundColor(background_color);
// The background is not opaque, so we can't do subpixel rendering.
title_->SetSubpixelRenderingEnabled(false);
close_button_->SetImage(
views::Button::STATE_NORMAL,
gfx::CreateVectorIcon(kOverviewWindowCloseIcon, kCloseButtonColor));
close_button_->SetImageHorizontalAlignment(views::ImageButton::ALIGN_CENTER);
close_button_->SetImageVerticalAlignment(views::ImageButton::ALIGN_MIDDLE);
close_button_->SetMinimumImageSize(
gfx::Size(kCloseButtonImageSize, kCloseButtonImageSize));
}
gfx::Size WindowPreview::GetPreviewContainerSize() const {
return gfx::Size(
std::min(delegate_->GetMaxPreviewRatio() *
ShelfConfig::Get()->shelf_tooltip_preview_height(),
static_cast<float>(
ShelfConfig::Get()->shelf_tooltip_preview_max_width())),
ShelfConfig::Get()->shelf_tooltip_preview_height());
}
void WindowPreview::CloseButtonPressed() {
// The window might have been closed in the mean time.
// TODO: Use WindowObserver to listen to when previewed windows are
// being closed and remove this condition.
aura::Window* target = preview_view_->window();
if (!target)
return;
window_util::CloseWidgetForWindow(target);
// This will have the effect of deleting this view.
delegate_->OnPreviewDismissed(this);
}
} // namespace ash
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