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// Copyright (c) 2006-2008 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 "chrome/browser/views/tabs/dragged_tab_view.h"
#include "chrome/common/gfx/chrome_canvas.h"
#include "chrome/browser/tab_contents/tab_contents.h"
#include "chrome/browser/tabs/tab_strip_model.h"
#include "chrome/browser/views/tabs/hwnd_photobooth.h"
#include "chrome/browser/views/tabs/tab_renderer.h"
#include "chrome/views/widget/widget_win.h"
#include "skia/include/SkShader.h"
const int kTransparentAlpha = 200;
const int kOpaqueAlpha = 255;
const int kDragFrameBorderSize = 2;
const int kTwiceDragFrameBorderSize = 2 * kDragFrameBorderSize;
const float kScalingFactor = 0.5;
const int kAnimateToBoundsDurationMs = 150;
static const SkColor kDraggedTabBorderColor = SkColorSetRGB(103, 129, 162);
////////////////////////////////////////////////////////////////////////////////
// DraggedTabView, public:
DraggedTabView::DraggedTabView(TabContents* datasource,
const gfx::Point& mouse_tab_offset,
const gfx::Size& contents_size)
: container_(NULL),
renderer_(new TabRenderer),
attached_(false),
mouse_tab_offset_(mouse_tab_offset),
attached_tab_size_(TabRenderer::GetMinimumSelectedSize()),
photobooth_(NULL),
contents_size_(contents_size),
close_animation_(this) {
SetParentOwned(false);
renderer_->UpdateData(datasource);
container_.reset(new views::WidgetWin);
container_->set_delete_on_destroy(false);
container_->set_window_style(WS_POPUP);
container_->set_window_ex_style(
WS_EX_LAYERED | WS_EX_TOPMOST | WS_EX_TOOLWINDOW);
container_->set_can_update_layered_window(false);
container_->Init(NULL, gfx::Rect(0, 0, 0, 0), false);
container_->SetContentsView(this);
}
DraggedTabView::~DraggedTabView() {
if (close_animation_.IsAnimating())
close_animation_.Stop();
GetParent()->RemoveChildView(this);
container_->CloseNow();
}
void DraggedTabView::MoveTo(const gfx::Point& screen_point) {
int show_flags = container_->IsVisible() ? SWP_NOZORDER : SWP_SHOWWINDOW;
int x;
if (UILayoutIsRightToLeft() && !attached_) {
// On RTL locales, a dragged tab (when it is not attached to a tab strip)
// is rendered using a right-to-left orientation so we should calculate the
// window position differently.
gfx::Size ps = GetPreferredSize();
x = screen_point.x() - ScaleValue(ps.width()) + mouse_tab_offset_.x() +
ScaleValue(
renderer_->MirroredXCoordinateInsideView(mouse_tab_offset_.x()));
} else {
x = screen_point.x() + mouse_tab_offset_.x() -
ScaleValue(mouse_tab_offset_.x());
}
int y = screen_point.y() + mouse_tab_offset_.y() -
ScaleValue(mouse_tab_offset_.y());
container_->SetWindowPos(HWND_TOP, x, y, 0, 0,
SWP_NOSIZE | SWP_NOACTIVATE | show_flags);
}
void DraggedTabView::Attach(int selected_width) {
attached_ = true;
photobooth_ = NULL;
attached_tab_size_.set_width(selected_width);
container_->SetLayeredAlpha(kOpaqueAlpha);
ResizeContainer();
Update();
}
void DraggedTabView::Detach(HWNDPhotobooth* photobooth) {
attached_ = false;
photobooth_ = photobooth;
container_->SetLayeredAlpha(kTransparentAlpha);
ResizeContainer();
Update();
}
void DraggedTabView::Update() {
container_->set_can_update_layered_window(true);
SchedulePaint();
container_->PaintNow(gfx::Rect());
container_->set_can_update_layered_window(false);
}
void DraggedTabView::AnimateToBounds(const gfx::Rect& bounds,
Callback0::Type* callback) {
animation_callback_.reset(callback);
RECT wr;
GetWindowRect(GetWidget()->GetNativeView(), &wr);
animation_start_bounds_ = wr;
animation_end_bounds_ = bounds;
close_animation_.SetSlideDuration(kAnimateToBoundsDurationMs);
close_animation_.SetTweenType(SlideAnimation::EASE_OUT);
if (!close_animation_.IsShowing()) {
close_animation_.Reset();
close_animation_.Show();
}
}
///////////////////////////////////////////////////////////////////////////////
// DraggedTabView, AnimationDelegate implementation:
void DraggedTabView::AnimationProgressed(const Animation* animation) {
int delta_x = (animation_end_bounds_.x() - animation_start_bounds_.x());
int x = animation_start_bounds_.x() +
static_cast<int>(delta_x * animation->GetCurrentValue());
int y = animation_end_bounds_.y();
container_->SetWindowPos(NULL, x, y, 0, 0, SWP_NOSIZE | SWP_NOACTIVATE);
}
void DraggedTabView::AnimationEnded(const Animation* animation) {
animation_callback_->Run();
}
void DraggedTabView::AnimationCanceled(const Animation* animation) {
AnimationEnded(animation);
}
///////////////////////////////////////////////////////////////////////////////
// DraggedTabView, views::View overrides:
void DraggedTabView::Paint(ChromeCanvas* canvas) {
if (attached_) {
PaintAttachedTab(canvas);
} else {
PaintDetachedView(canvas);
}
}
void DraggedTabView::Layout() {
if (attached_) {
gfx::Size prefsize = GetPreferredSize();
renderer_->SetBounds(0, 0, prefsize.width(), prefsize.height());
} else {
int left = 0;
if (UILayoutIsRightToLeft())
left = GetPreferredSize().width() - attached_tab_size_.width();
renderer_->SetBounds(left, 0, left + attached_tab_size_.width(),
attached_tab_size_.height());
}
}
gfx::Size DraggedTabView::GetPreferredSize() {
if (attached_)
return attached_tab_size_;
int width = std::max(attached_tab_size_.width(), contents_size_.width()) +
kTwiceDragFrameBorderSize;
int height = attached_tab_size_.height() + kDragFrameBorderSize +
contents_size_.height();
return gfx::Size(width, height);
}
////////////////////////////////////////////////////////////////////////////////
// DraggedTabView, private:
void DraggedTabView::PaintAttachedTab(ChromeCanvas* canvas) {
renderer_->ProcessPaint(canvas);
}
void DraggedTabView::PaintDetachedView(ChromeCanvas* canvas) {
gfx::Size ps = GetPreferredSize();
ChromeCanvas scale_canvas(ps.width(), ps.height(), false);
SkBitmap& bitmap_device = const_cast<SkBitmap&>(
scale_canvas.getTopPlatformDevice().accessBitmap(true));
bitmap_device.eraseARGB(0, 0, 0, 0);
scale_canvas.FillRectInt(kDraggedTabBorderColor, 0,
attached_tab_size_.height() - kDragFrameBorderSize,
ps.width(), ps.height() - attached_tab_size_.height());
int image_x = kDragFrameBorderSize;
int image_y = attached_tab_size_.height();
int image_w = ps.width() - kTwiceDragFrameBorderSize;
int image_h =
ps.height() - kTwiceDragFrameBorderSize - attached_tab_size_.height();
scale_canvas.FillRectInt(SK_ColorBLACK, image_x, image_y, image_w, image_h);
photobooth_->PaintScreenshotIntoCanvas(
&scale_canvas,
gfx::Rect(image_x, image_y, image_w, image_h));
renderer_->ProcessPaint(&scale_canvas);
SkIRect subset;
subset.set(0, 0, ps.width(), ps.height());
SkBitmap mipmap = scale_canvas.ExtractBitmap();
mipmap.buildMipMap(true);
SkShader* bitmap_shader =
SkShader::CreateBitmapShader(mipmap, SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode);
SkMatrix shader_scale;
shader_scale.setScale(kScalingFactor, kScalingFactor);
bitmap_shader->setLocalMatrix(shader_scale);
SkPaint paint;
paint.setShader(bitmap_shader);
paint.setAntiAlias(true);
bitmap_shader->unref();
SkRect rc;
rc.fLeft = 0;
rc.fTop = 0;
rc.fRight = SkIntToScalar(ps.width());
rc.fBottom = SkIntToScalar(ps.height());
canvas->drawRect(rc, paint);
}
void DraggedTabView::ResizeContainer() {
gfx::Size ps = GetPreferredSize();
SetWindowPos(container_->GetNativeView(), HWND_TOPMOST, 0, 0,
ScaleValue(ps.width()), ScaleValue(ps.height()),
SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE);
}
int DraggedTabView::ScaleValue(int value) {
return attached_ ? value : static_cast<int>(value * kScalingFactor);
}
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