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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/tabs/tab_group_underline.h"
#include <memory>
#include <utility>
#include "chrome/browser/ui/layout_constants.h"
#include "chrome/browser/ui/tabs/tab_style.h"
#include "chrome/browser/ui/views/tabs/tab.h"
#include "chrome/browser/ui/views/tabs/tab_group_header.h"
#include "chrome/browser/ui/views/tabs/tab_group_style.h"
#include "chrome/browser/ui/views/tabs/tab_group_views.h"
#include "components/tab_groups/tab_group_id.h"
#include "components/tab_groups/tab_group_visual_data.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/geometry/insets.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/views/background.h"
#include "ui/views/view.h"
#include "ui/views/view_utils.h"
constexpr int TabGroupUnderline::kStrokeThickness;
TabGroupUnderline::TabGroupUnderline(TabGroupViews* tab_group_views,
const tab_groups::TabGroupId& group,
const TabGroupStyle& style)
: tab_group_views_(tab_group_views), group_(group), style_(style) {}
void TabGroupUnderline::OnPaint(gfx::Canvas* canvas) {
SkPath path = style_->GetUnderlinePath(GetLocalBounds());
cc::PaintFlags flags;
flags.setAntiAlias(true);
flags.setColor(tab_group_views_->GetGroupColor());
flags.setStyle(cc::PaintFlags::kFill_Style);
canvas->DrawPath(path, flags);
}
void TabGroupUnderline::UpdateBounds(const views::View* const leading_view,
const views::View* const trailing_view) {
// If there are no views to underline, don't show the underline.
if (!leading_view) {
SetVisible(false);
return;
}
const gfx::Rect tab_group_underline_bounds =
CalculateTabGroupUnderlineBounds(this, leading_view, trailing_view);
// The width may be zero if the group underline and header are initialized at
// the same time, as with tab restore. In this case, don't show the underline.
if (tab_group_underline_bounds.width() == 0) {
SetVisible(false);
return;
}
SetVisible(
!style_->TabGroupUnderlineShouldBeHidden(leading_view, trailing_view));
SetBoundsRect(tab_group_underline_bounds);
}
gfx::Rect TabGroupUnderline::CalculateTabGroupUnderlineBounds(
const views::View* const underline_view,
const views::View* const leading_view,
const views::View* const trailing_view) const {
gfx::RectF leading_bounds = views::View::ConvertRectToTarget(
leading_view->parent(), underline_view->parent(),
gfx::RectF(leading_view->bounds()));
leading_bounds.Inset(gfx::InsetsF(GetInsetsForUnderline(leading_view)));
gfx::RectF trailing_bounds = views::View::ConvertRectToTarget(
trailing_view->parent(), underline_view->parent(),
gfx::RectF(trailing_view->bounds()));
trailing_bounds.Inset(gfx::InsetsF(GetInsetsForUnderline(trailing_view)));
gfx::Rect group_bounds = ToEnclosingRect(leading_bounds);
group_bounds.UnionEvenIfEmpty(ToEnclosingRect(trailing_bounds));
const int y =
group_bounds.bottom() - GetLayoutConstant(TABSTRIP_TOOLBAR_OVERLAP);
return gfx::Rect(group_bounds.x(), y - kStrokeThickness, group_bounds.width(),
kStrokeThickness);
}
gfx::Insets TabGroupUnderline::GetInsetsForUnderline(
const views::View* const sibling_view) const {
// Inset normally from a header - this will always be the left boundary of
// the group, and may be the right boundary if the group is collapsed.
const TabGroupHeader* const header =
views::AsViewClass<TabGroupHeader>(sibling_view);
if (header) {
return gfx::Insets::TLBR(0, TabGroupUnderline::GetStrokeInset(), 0,
TabGroupUnderline::GetStrokeInset());
}
const Tab* const tab = views::AsViewClass<Tab>(sibling_view);
DCHECK(tab);
// Active tabs need the rounded bits of the underline poking out the sides.
if (tab->IsActive()) {
return gfx::Insets::TLBR(0, -kStrokeThickness, 0, -kStrokeThickness);
}
// Inactive tabs are inset like group headers.
const int left_inset = TabGroupUnderline::GetStrokeInset();
const int right_inset = TabGroupUnderline::GetStrokeInset();
return gfx::Insets::TLBR(0, left_inset, 0, right_inset);
}
void TabGroupUnderline::MaybeSetVisible(const bool visible) {
SetVisible(visible && !style_->TabGroupUnderlineShouldBeHidden());
}
// static
int TabGroupUnderline::GetStrokeInset() {
return TabStyle::Get()->GetTabOverlap() -
TabGroupStyle::GetTabGroupOverlapAdjustment() + kStrokeThickness;
}
BEGIN_METADATA(TabGroupUnderline)
END_METADATA
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