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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_highlight.h"
#include "chrome/browser/ui/layout_constants.h"
#include "chrome/browser/ui/tabs/tab_style.h"
#include "chrome/browser/ui/views/tabs/tab_group_views.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/gfx/canvas.h"
#include "ui/views/background.h"
#include "ui/views/view.h"
#include "ui/views/widget/widget.h"
TabGroupHighlight::TabGroupHighlight(TabGroupViews* tab_group_views,
const tab_groups::TabGroupId& group,
const TabGroupStyle& style)
: tab_group_views_(tab_group_views), group_(group), style_(style) {
// Don't accept any mouse events, otherwise this will prevent tabs and group
// headers from getting clicked.
SetCanProcessEventsWithinSubtree(false);
}
void TabGroupHighlight::UpdateBounds(views::View* leading_view,
views::View* trailing_view) {
// If there are no views to highlight, do nothing. Our visibility is
// controlled by our parent TabDragContext.
if (!leading_view) {
return;
}
gfx::Rect bounds = leading_view->bounds();
bounds.UnionEvenIfEmpty(trailing_view->bounds());
SetBoundsRect(bounds);
}
void TabGroupHighlight::OnPaint(gfx::Canvas* canvas) {
SkPath path = GetPath();
cc::PaintFlags flags;
flags.setAntiAlias(true);
flags.setStyle(cc::PaintFlags::kFill_Style);
flags.setColor(TabStyle::Get()->GetTabBackgroundColor(
TabStyle::TabSelectionState::kSelected, /*hovered=*/false,
GetWidget()->ShouldPaintAsActive(), *GetColorProvider()));
canvas->DrawPath(path, flags);
}
SkPath TabGroupHighlight::GetPath() const {
// This path imitates the shape of a tab (see GM2TabStyle::GetPath()). It
// doesn't reuse the exact same GetPath() function because it doesn't need
// much of the complexity there. Group highlights only appear on group drag,
// which is a well-scoped interaction. A dragging group doesn't nestle in with
// the tabs around it, so there are no special cases needed when determining
// its shape.
const int corner_radius = TabStyle::Get()->GetBottomCornerRadius();
const int top = GetLayoutConstant(TAB_STRIP_PADDING);
SkPath path;
path.moveTo(0, bounds().height());
path.arcTo(corner_radius, corner_radius, 0, SkPath::kSmall_ArcSize,
SkPathDirection::kCCW, corner_radius,
bounds().height() - corner_radius);
path.lineTo(corner_radius, top + corner_radius);
path.arcTo(corner_radius, corner_radius, 0, SkPath::kSmall_ArcSize,
SkPathDirection::kCW, 2 * corner_radius, top);
path.lineTo(bounds().width() - 2 * corner_radius, top);
path.arcTo(corner_radius, corner_radius, 0, SkPath::kSmall_ArcSize,
SkPathDirection::kCW, bounds().width() - corner_radius,
top + corner_radius);
path.lineTo(bounds().width() - corner_radius,
bounds().height() - corner_radius);
path.arcTo(corner_radius, corner_radius, 0, SkPath::kSmall_ArcSize,
SkPathDirection::kCCW, bounds().width(), bounds().height());
path.close();
return path;
}
BEGIN_METADATA(TabGroupHighlight)
END_METADATA
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