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// Copyright 2019 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/ui/views/frame/top_container_loading_bar.h"
#include "chrome/browser/favicon/favicon_utils.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/color/chrome_color_id.h"
#include "chrome/browser/ui/tab_ui_helper.h"
#include "chrome/browser/ui/tabs/public/tab_features.h"
#include "components/tabs/public/tab_interface.h"
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/color/color_provider.h"
#include "ui/compositor/layer.h"
#include "ui/gfx/animation/tween.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/color_palette.h"
LoadingBarView::LoadingBarView() {
SetPaintToLayer();
layer()->SetFillsBoundsOpaquely(false);
animation_.SetDuration(base::Milliseconds(300));
}
double LoadingBarView::GetDisplayedLoadingProgress() const {
return gfx::Tween::DoubleValueBetween(
gfx::Tween::CalculateValue(gfx::Tween::EASE_OUT,
animation_.GetCurrentValue()),
start_loading_progress_, target_loading_progress_);
}
void LoadingBarView::OnThemeChanged() {
views::View::OnThemeChanged();
SchedulePaint();
}
void LoadingBarView::AddedToWidget() {
SchedulePaint();
}
void LoadingBarView::HideImmediately() {
is_shown_when_not_animating_ = false;
start_loading_progress_ = 0.0;
target_loading_progress_ = 0.0;
animation_.Stop();
// If we were previously drawn we have to redraw as invisible.
SchedulePaint();
}
void LoadingBarView::Show(double loading_progress) {
is_shown_when_not_animating_ = true;
start_loading_progress_ = loading_progress;
target_loading_progress_ = loading_progress;
animation_.Stop();
SchedulePaint();
}
void LoadingBarView::FinishLoading() {
if (!is_shown_when_not_animating_) {
return;
}
SetLoadingProgress(1.0);
is_shown_when_not_animating_ = false;
}
void LoadingBarView::SetLoadingProgress(double loading_progress) {
if (loading_progress <= target_loading_progress_) {
return;
}
start_loading_progress_ = GetDisplayedLoadingProgress();
target_loading_progress_ = loading_progress;
animation_.SetCurrentValue(0.0);
animation_.Start();
}
void LoadingBarView::OnPaint(gfx::Canvas* canvas) {
if (is_shown_when_not_animating_ || animation_.is_animating()) {
const auto* const color_provider = GetColorProvider();
canvas->FillRect(
GetLocalBounds(),
color_provider->GetColor(kColorTabstripLoadingProgressBackground));
gfx::Rect progress_bounds(GetLocalBounds());
progress_bounds.set_width(gfx::Tween::IntValueBetween(
GetDisplayedLoadingProgress(), 0, progress_bounds.width()));
canvas->FillRect(
progress_bounds,
color_provider->GetColor(kColorTabstripLoadingProgressForeground));
}
}
void LoadingBarView::AnimationEnded(const gfx::Animation* animation) {
SchedulePaint();
}
void LoadingBarView::AnimationProgressed(const gfx::Animation* animation) {
SchedulePaint();
}
BEGIN_METADATA(LoadingBarView)
END_METADATA
TopContainerLoadingBar::TopContainerLoadingBar(Browser* browser)
: browser_(browser) {}
void TopContainerLoadingBar::SetWebContents(
content::WebContents* web_contents) {
Observe(web_contents);
if (!web_contents) {
network_state_ = TabNetworkState::kNone;
HideImmediately();
return;
}
// TODO(pbos): Consider storing one loading bar per tab and have it run (and
// observing) in the background. This would remove the need to reset
// loading-bar state during tab transitions as we'd just swap in the visible
// object. Currently Show(GetLoadingProgress()) can decrease from what was
// previously displayed in that tab.
// Reset network state to update from a clean slate.
network_state_ = TabNetworkState::kNone;
UpdateLoadingProgress();
}
void TopContainerLoadingBar::UpdateLoadingProgress() {
DCHECK(web_contents());
if (!browser_->ShouldDisplayFavicon(web_contents())) {
HideImmediately();
return;
}
tabs::TabInterface* const tab_interface =
tabs::TabInterface::GetFromContents(web_contents());
TabUIHelper* const tab_ui_helper =
tab_interface->GetTabFeatures()->tab_ui_helper();
if (tab_ui_helper->ShouldHideThrobber()) {
HideImmediately();
return;
}
const TabNetworkState old_network_state = network_state_;
network_state_ = TabNetworkStateForWebContents(web_contents());
if (old_network_state != network_state_) {
if (network_state_ == TabNetworkState::kWaiting ||
network_state_ == TabNetworkState::kLoading) {
// Reset loading state when we go to waiting or loading.
Show(GetLoadingProgress());
}
}
switch (network_state_) {
case TabNetworkState::kLoading:
SetLoadingProgress(GetLoadingProgress());
break;
case TabNetworkState::kError:
// TODO(pbos): Add a better error indicator (fade-out red?).
HideImmediately();
break;
case TabNetworkState::kWaiting:
break;
case TabNetworkState::kNone:
FinishLoading();
break;
}
}
double TopContainerLoadingBar::GetLoadingProgress() const {
DCHECK(web_contents());
return std::min(web_contents()->GetLoadProgress(), 0.9);
}
void TopContainerLoadingBar::LoadProgressChanged(double progress) {
UpdateLoadingProgress();
}
BEGIN_METADATA(TopContainerLoadingBar)
ADD_READONLY_PROPERTY_METADATA(double, LoadingProgress)
END_METADATA
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