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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/views/controls/tabbed_pane/tabbed_pane.h"
#include <algorithm>
#include <string>
#include <utility>
#include "base/check_op.h"
#include "base/i18n/rtl.h"
#include "build/build_config.h"
#include "cc/paint/paint_flags.h"
#include "third_party/skia/include/core/SkPath.h"
#include "ui/accessibility/ax_action_data.h"
#include "ui/base/default_style.h"
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/color/color_id.h"
#include "ui/color/color_provider.h"
#include "ui/events/keycodes/keyboard_codes.h"
#include "ui/gfx/animation/tween.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/color_palette.h"
#include "ui/gfx/font_list.h"
#include "ui/gfx/geometry/outsets.h"
#include "ui/gfx/geometry/skia_conversions.h"
#include "ui/views/accessibility/view_accessibility.h"
#include "ui/views/border.h"
#include "ui/views/controls/label.h"
#include "ui/views/controls/scroll_view.h"
#include "ui/views/controls/tabbed_pane/tabbed_pane_listener.h"
#include "ui/views/layout/box_layout.h"
#include "ui/views/layout/fill_layout.h"
#include "ui/views/layout/flex_layout.h"
#include "ui/views/layout/layout_manager.h"
#include "ui/views/layout/layout_manager_base.h"
#include "ui/views/layout/layout_provider.h"
#include "ui/views/layout/layout_types.h"
#include "ui/views/view_class_properties.h"
#include "ui/views/widget/widget.h"
namespace views {
namespace {
bool IsValidOrientationStyleCombo(TabbedPane::Orientation orientation,
TabbedPane::TabStripStyle style) {
const bool is_horizontal =
orientation == TabbedPane::Orientation::kHorizontal;
const bool is_vertical = orientation == TabbedPane::Orientation::kVertical;
const bool is_highlight_style =
style == TabbedPane::TabStripStyle::kHighlight;
const bool is_compact_with_icon =
style == TabbedPane::TabStripStyle::kCompactWithIcon;
const bool is_with_icon = style == TabbedPane::TabStripStyle::kWithIcon;
// Determine if the combination is invalid.
const bool horizontal_highlight = is_horizontal && is_highlight_style;
const bool vertical_icon =
is_vertical && (is_compact_with_icon || is_with_icon);
return !horizontal_highlight && !vertical_icon;
}
} // namespace
TabbedPaneTab::TabbedPaneTab(TabbedPaneTabStrip* tab_strip,
const std::u16string& title,
const gfx::VectorIcon* tab_icon)
: tab_strip_(tab_strip), icon_for_tab_(tab_icon) {
// Calculate the size while the font list is bold.
auto title_label = std::make_unique<Label>(title, style::CONTEXT_LABEL,
style::STYLE_TAB_ACTIVE);
title_ = title_label.get();
UpdatePreferredTitleWidth();
if (tab_strip_->GetOrientation() == TabbedPane::Orientation::kVertical) {
title_label->SetHorizontalAlignment(gfx::HorizontalAlignment::ALIGN_LEFT);
const bool is_highlight_style =
tab_strip_->GetStyle() == TabbedPane::TabStripStyle::kHighlight;
constexpr auto kTabPadding = gfx::Insets::VH(5, 10);
constexpr auto kTabPaddingHighlight = gfx::Insets::TLBR(8, 32, 8, 0);
SetBorder(CreateEmptyBorder(is_highlight_style ? kTabPaddingHighlight
: kTabPadding));
} else {
constexpr auto kBorderThickness = gfx::Insets(2);
SetBorder(CreateEmptyBorder(kBorderThickness));
}
SetState(State::kInactive);
// Create an icon if the style requests one.
if (tab_strip_->HasIconStyle()) {
auto icon = std::make_unique<views::ImageView>(
GetImageModelForTab(GetIconTitleColor()));
icon_view_ = icon.get();
AddChildView(std::move(icon));
// If there is a icon, there should be spacing between the icon & title.
title_->SetProperty(views::kMarginsKey,
gfx::Insets::TLBR(0, kDefaultTitleLeftMargin, 0, 0));
}
AddChildView(std::move(title_label));
// A child with FillLayout determines it's own size as the parents bounds.
// Therefore, for a single child, FillLayout is okay. However when multiple
// elements are present (e.g. icon + text), we need to use a BoxLayout to
// arrange them correctly.
if (tab_strip_->HasIconStyle()) {
auto box_layout = std::make_unique<BoxLayout>();
box_layout->set_main_axis_alignment(
views::BoxLayout::MainAxisAlignment::kCenter);
box_layout->set_cross_axis_alignment(
views::BoxLayout::CrossAxisAlignment::kCenter);
SetLayoutManager(std::move(box_layout));
} else {
SetLayoutManager(std::make_unique<FillLayout>());
}
// Use leaf so that name is spoken by screen reader without exposing the
// children.
GetViewAccessibility().SetIsLeaf(true);
GetViewAccessibility().SetRole(ax::mojom::Role::kTab);
UpdateAccessibleName();
OnStateChanged();
title_text_changed_callback_ =
title_->AddTextChangedCallback(base::BindRepeating(
&TabbedPaneTab::UpdateAccessibleName, base::Unretained(this)));
}
TabbedPaneTab::~TabbedPaneTab() = default;
void TabbedPaneTab::SetSelected(bool selected) {
selected_ = selected;
SetState(selected ? State::kActive : State::kInactive);
#if BUILDFLAG(IS_MAC)
SetFocusBehavior(selected ? FocusBehavior::ACCESSIBLE_ONLY
: FocusBehavior::NEVER);
#else
SetFocusBehavior(selected ? FocusBehavior::ALWAYS : FocusBehavior::NEVER);
#endif
}
std::u16string_view TabbedPaneTab::GetTitleText() const {
return title_->GetText();
}
void TabbedPaneTab::SetTitleText(std::u16string_view text) {
title_->SetText(text);
UpdatePreferredTitleWidth();
PreferredSizeChanged();
}
void TabbedPaneTab::SetTitleMargin(const gfx::Insets& margin) {
title_->SetProperty(views::kMarginsKey, margin);
PreferredSizeChanged();
}
void TabbedPaneTab::SetIconMargin(const gfx::Insets& margin) {
if (icon_view_) {
icon_view_->SetProperty(views::kMarginsKey, margin);
}
PreferredSizeChanged();
}
void TabbedPaneTab::SetTabOutsets(const gfx::Outsets& outsets) {
tab_outsets_ = outsets;
PreferredSizeChanged();
}
void TabbedPaneTab::SetHeight(int height) {
height_ = height;
PreferredSizeChanged();
}
bool TabbedPaneTab::OnMousePressed(const ui::MouseEvent& event) {
if (GetEnabled() && event.IsOnlyLeftMouseButton()) {
tab_strip_->SelectTab(this);
}
return true;
}
void TabbedPaneTab::OnMouseEntered(const ui::MouseEvent& event) {
SetState(selected() ? State::kActive : State::kHovered);
}
void TabbedPaneTab::OnMouseExited(const ui::MouseEvent& event) {
SetState(selected() ? State::kActive : State::kInactive);
}
void TabbedPaneTab::UpdateEnabledColor(bool enabled) {
if (enabled) {
UpdateTitleColor();
UpdateIconColor();
} else {
title_->SetEnabledColor(ui::kColorTabForegroundDisabled);
if (icon_view_) {
icon_view_->SetImage(
GetImageModelForTab(ui::kColorTabForegroundDisabled));
}
}
}
void TabbedPaneTab::OnGestureEvent(ui::GestureEvent* event) {
switch (event->type()) {
case ui::EventType::kGestureTapDown:
case ui::EventType::kGestureTap:
// SelectTab also sets the right tab color.
tab_strip_->SelectTab(this);
break;
case ui::EventType::kGestureTapCancel:
SetState(selected() ? State::kActive : State::kInactive);
break;
default:
break;
}
event->SetHandled();
}
gfx::Size TabbedPaneTab::CalculatePreferredSize(
const SizeBounds& available_size) const {
int width = preferred_title_width_ + GetInsets().width();
// An icon is only present in kCompactWithIcon or kWithIcon styles, in a
// horizontal orientation.
if (tab_strip_->HasIconStyle() &&
tab_strip_->GetOrientation() == TabbedPane::Orientation::kHorizontal) {
width += icon_view_->GetPreferredSize({}).width() + kDefaultTitleLeftMargin;
}
if (tab_strip_->GetStyle() == TabbedPane::TabStripStyle::kHighlight &&
tab_strip_->GetOrientation() == TabbedPane::Orientation::kVertical) {
width = std::max(width, kMinimumVerticalTabWidth);
}
gfx::Rect preferred(width, height_);
preferred.Outset(tab_outsets_);
return preferred.size();
}
bool TabbedPaneTab::HandleAccessibleAction(
const ui::AXActionData& action_data) {
// If the assistive tool sends kSetSelection, handle it like kDoDefault.
// These generate a click event handled in TabbedPaneTab::OnMousePressed.
ui::AXActionData action_data_copy(action_data);
if (action_data.action == ax::mojom::Action::kSetSelection) {
action_data_copy.action = ax::mojom::Action::kDoDefault;
}
return View::HandleAccessibleAction(action_data_copy);
}
void TabbedPaneTab::OnFocus() {
// Do not draw focus ring in kHighlight mode.
if (tab_strip_->GetStyle() != TabbedPane::TabStripStyle::kHighlight) {
// Maintain the current Insets with CreatePaddedBorder.
int border_size = 2;
SetBorder(CreatePaddedBorder(
CreateSolidBorder(border_size, GetColorProvider()->GetColor(
ui::kColorFocusableBorderFocused)),
GetInsets() - gfx::Insets(border_size)));
}
SchedulePaint();
}
void TabbedPaneTab::OnBlur() {
// Do not draw focus ring in kHighlight mode.
if (tab_strip_->GetStyle() != TabbedPane::TabStripStyle::kHighlight) {
SetBorder(CreateEmptyBorder(GetInsets()));
}
SchedulePaint();
}
bool TabbedPaneTab::OnKeyPressed(const ui::KeyEvent& event) {
const ui::KeyboardCode key = event.key_code();
if (tab_strip_->GetOrientation() == TabbedPane::Orientation::kHorizontal) {
// Use left and right arrows to navigate tabs in horizontal orientation.
int delta = key == ui::VKEY_RIGHT ? 1 : -1;
if (base::i18n::IsRTL()) {
delta = key == ui::VKEY_RIGHT ? -1 : 1;
}
return (key == ui::VKEY_LEFT || key == ui::VKEY_RIGHT) &&
tab_strip_->MoveSelectionBy(delta);
}
// Use up and down arrows to navigate tabs in vertical orientation.
return (key == ui::VKEY_UP || key == ui::VKEY_DOWN) &&
tab_strip_->MoveSelectionBy(key == ui::VKEY_DOWN ? 1 : -1);
}
void TabbedPaneTab::OnThemeChanged() {
View::OnThemeChanged();
UpdateTitleColor();
}
void TabbedPaneTab::SetState(State state) {
if (state == state_) {
return;
}
state_ = state;
OnStateChanged();
SchedulePaint();
}
void TabbedPaneTab::OnStateChanged() {
// Update colors that depend on state if present in a Widget hierarchy.
if (GetWidget()) {
UpdateTitleColor();
}
UpdateIconColor();
// TabbedPaneTab design spec dictates special handling of font weight for
// the windows platform when dealing with border style tabs.
if (tab_strip_->GetStyle() == TabbedPane::TabStripStyle::kHighlight) {
// Style the tab text according to the spec for highlight style tabs. We no
// longer have windows specific bolding of text in this case.
int font_size_delta = 1;
gfx::Font::Weight font_weight = (state_ == State::kActive)
? font_weight = gfx::Font::Weight::BOLD
: gfx::Font::Weight::MEDIUM;
ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
title_->SetFontList(
rb.GetFontListForDetails(ui::ResourceBundle::FontDetails(
std::string(), font_size_delta, font_weight)));
} else {
title_->SetTextStyle(views::style::STYLE_BODY_3_EMPHASIS);
}
UpdateAccessibleSelection();
}
void TabbedPaneTab::OnPaint(gfx::Canvas* canvas) {
View::OnPaint(canvas);
// Paints the active tab for the vertical highlighted tabbed pane.
if (!selected() ||
tab_strip_->GetOrientation() != TabbedPane::Orientation::kVertical ||
tab_strip_->GetStyle() != TabbedPane::TabStripStyle::kHighlight) {
return;
}
constexpr SkScalar kRadius = SkIntToScalar(32);
constexpr SkScalar kLTRRadii[8] = {0, 0, kRadius, kRadius,
kRadius, kRadius, 0, 0};
constexpr SkScalar kRTLRadii[8] = {kRadius, kRadius, 0, 0,
0, 0, kRadius, kRadius};
SkPath path;
path.addRoundRect(gfx::RectToSkRect(GetLocalBounds()),
base::i18n::IsRTL() ? kRTLRadii : kLTRRadii);
cc::PaintFlags fill_flags;
fill_flags.setAntiAlias(true);
fill_flags.setColor(GetColorProvider()->GetColor(
HasFocus() ? ui::kColorTabBackgroundHighlightedFocused
: ui::kColorTabBackgroundHighlighted));
canvas->DrawPath(path, fill_flags);
}
void TabbedPaneTab::UpdatePreferredTitleWidth() {
// Active and inactive states use different font sizes. Find the largest size
// and reserve that amount of space.
const State old_state = state_;
SetState(State::kActive);
preferred_title_width_ = title_->GetPreferredSize({}).width();
SetState(State::kInactive);
preferred_title_width_ =
std::max(preferred_title_width_, title_->GetPreferredSize({}).width());
SetState(old_state);
}
void TabbedPaneTab::UpdateTitleColor() {
DCHECK(GetWidget());
title_->SetEnabledColor(GetIconTitleColor());
}
void TabbedPaneTab::UpdateIconColor() {
// icon_view_ is not guaranteed to be defined based on the caller's selected
// TabStripStyle.
if (icon_view_) {
icon_view_->SetImage(GetImageModelForTab(GetIconTitleColor()));
}
}
void TabbedPaneTab::UpdateAccessibleName() {
if (title_->GetText().empty()) {
GetViewAccessibility().SetName(
std::string(), ax::mojom::NameFrom::kAttributeExplicitlyEmpty);
} else {
GetViewAccessibility().SetName(std::u16string(title_->GetText()),
ax::mojom::NameFrom::kContents);
}
tab_strip_->UpdateAccessibleName();
}
void TabbedPaneTab::UpdateAccessibleSelection() {
GetViewAccessibility().SetIsSelected(selected());
}
ui::ImageModel TabbedPaneTab::GetImageModelForTab(ui::ColorId color_id) const {
DCHECK(icon_for_tab_);
return ui::ImageModel::FromVectorIcon(*icon_for_tab_, color_id,
kDefaultIconSize);
}
ui::ColorId TabbedPaneTab::GetIconTitleColor() const {
return state_ == State::kActive ? ui::kColorTabForegroundSelected
: ui::kColorTabForeground;
}
BEGIN_METADATA(TabbedPaneTab)
END_METADATA
// static
constexpr size_t TabbedPaneTabStrip::kNoSelectedTab;
TabbedPaneTabStrip::TabbedPaneTabStrip(TabbedPane::Orientation orientation,
TabbedPane::TabStripStyle style,
raw_ptr<TabbedPane> tabbed_pane)
: orientation_(orientation), style_(style), tabbed_pane_(tabbed_pane) {
std::unique_ptr<BoxLayout> layout;
if (orientation == TabbedPane::Orientation::kHorizontal) {
layout = std::make_unique<BoxLayout>(BoxLayout::Orientation::kHorizontal);
layout->set_main_axis_alignment(BoxLayout::MainAxisAlignment::kCenter);
layout->set_cross_axis_alignment(BoxLayout::CrossAxisAlignment::kStretch);
layout->SetDefaultFlex(1);
} else {
constexpr auto kEdgePadding = gfx::Insets::TLBR(8, 0, 0, 0);
constexpr int kTabSpacing = 8;
layout = std::make_unique<BoxLayout>(BoxLayout::Orientation::kVertical,
kEdgePadding, kTabSpacing);
layout->set_main_axis_alignment(BoxLayout::MainAxisAlignment::kStart);
layout->set_cross_axis_alignment(BoxLayout::CrossAxisAlignment::kStart);
layout->SetDefaultFlex(0);
}
SetLayoutManager(std::move(layout));
// Support navigating tabs by Ctrl+Tab and Ctrl+Shift+Tab.
AddAccelerator(
ui::Accelerator(ui::VKEY_TAB, ui::EF_CONTROL_DOWN | ui::EF_SHIFT_DOWN));
AddAccelerator(ui::Accelerator(ui::VKEY_TAB, ui::EF_CONTROL_DOWN));
// If the component is part of a parent TabbedPane, there is no accessibility
// that needs to be set for this component.
if (tabbed_pane) {
GetViewAccessibility().SetRole(ax::mojom::Role::kNone);
} else {
// Otherwise, it's a standalone component so set the accessibility role.
GetViewAccessibility().SetRole(ax::mojom::Role::kTabList);
UpdateAccessibleName();
}
// These durations are taken from the Paper Tabs source:
// https://github.com/PolymerElements/paper-tabs/blob/master/paper-tabs.html
// See |selectionBar.expand| and |selectionBar.contract|.
expand_animation_->SetDuration(base::Milliseconds(150));
contract_animation_->SetDuration(base::Milliseconds(180));
}
TabbedPaneTabStrip::~TabbedPaneTabStrip() = default;
TabbedPaneTab* TabbedPaneTabStrip::AddTab(const std::u16string& title,
const gfx::VectorIcon* tab_icon) {
auto* tab = AddTabAt(title, tab_icon, GetTabCount());
// Always select the first tab.
if (!GetSelectedTab()) {
SelectTab(GetTabAtIndex(0));
}
return tab;
}
TabbedPaneTab* TabbedPaneTabStrip::AddTabAt(const std::u16string& title,
const gfx::VectorIcon* tab_icon,
size_t index) {
auto* tab = AddChildViewAt(
std::make_unique<TabbedPaneTab>(this, title, tab_icon), index);
PreferredSizeChanged();
return tab;
}
void TabbedPaneTabStrip::AnimationProgressed(const gfx::Animation* animation) {
SchedulePaint();
}
void TabbedPaneTabStrip::AnimationEnded(const gfx::Animation* animation) {
if (animation == expand_animation_.get()) {
contract_animation_->Start();
}
}
// Computes the starting and ending points of the selection slider for a given
// tab from the origin.
//
// For example (s = starting_x, e = ending_x):
// |(x) Label|
// --s^------e^
// In this situation, starting_x = 0, and ending_x = tab->width()
//
// However, if the tab is in a FillLayout:
// | (x) Label |
// -------s^------e^
// The starting_x will be the dynamic distance between the start of the tab |,
// and the icon (x) in the tab. Likewise, ending_x is starting_x + content_width
TabbedPaneTabStrip::Coordinates TabbedPaneTabStrip::GetIconLabelStartEndingX(
TabbedPaneTab* tab) {
const int target_halfwidth = tab->CalculatePreferredSize({}).width() / 2;
const int current_halfwidth = tab->width() / 2;
const int starting_x = current_halfwidth - target_halfwidth;
const int ending_x = current_halfwidth + target_halfwidth;
return {starting_x, ending_x};
}
bool TabbedPaneTabStrip::AcceleratorPressed(
const ui::Accelerator& accelerator) {
// Handle Ctrl+Tab and Ctrl+Shift+Tab navigation of pages.
DCHECK_EQ(accelerator.key_code(), ui::VKEY_TAB);
DCHECK(accelerator.IsCtrlDown());
return MoveSelectionBy(accelerator.IsShiftDown() ? -1 : 1);
}
void TabbedPaneTabStrip::OnSelectedTabChanged(TabbedPaneTab* from_tab,
TabbedPaneTab* to_tab,
bool animate) {
DCHECK(!from_tab->selected());
DCHECK(to_tab->selected());
if (!animate || !GetWidget()) {
return;
}
if (GetOrientation() == TabbedPane::Orientation::kHorizontal) {
if (GetStyle() == TabbedPane::TabStripStyle::kCompactWithIcon) {
// Compute the starting/ending points, which begins at the icon and spans
// any margins + length of text.
const TabbedPaneTabStrip::Coordinates from_x =
GetIconLabelStartEndingX(from_tab);
const TabbedPaneTabStrip::Coordinates to_x =
GetIconLabelStartEndingX(to_tab);
animating_from_ = {from_tab->GetMirroredX() + from_x.start,
from_tab->GetMirroredX() + from_x.end};
animating_to_ = {to_tab->GetMirroredX() + to_x.start,
to_tab->GetMirroredX() + to_x.end};
} else {
animating_from_ = {from_tab->GetMirroredX(),
from_tab->GetMirroredX() + from_tab->width()};
animating_to_ = {to_tab->GetMirroredX(),
to_tab->GetMirroredX() + to_tab->width()};
}
} else {
animating_from_ = {from_tab->bounds().y(),
from_tab->bounds().y() + from_tab->height()};
animating_to_ = {to_tab->bounds().y(),
to_tab->bounds().y() + to_tab->height()};
}
contract_animation_->Stop();
expand_animation_->Start();
}
bool TabbedPaneTabStrip::SelectTab(TabbedPaneTab* new_selected_tab,
bool animate) {
TabbedPaneTab* old_selected_tab = GetSelectedTab();
if (old_selected_tab == new_selected_tab) {
return false;
}
const size_t new_selected_tab_idx = GetIndexForTab(new_selected_tab);
new_selected_tab->SetSelected(true);
MaybeUpdateTabContentVisibility(new_selected_tab_idx, true);
if (old_selected_tab) {
if (old_selected_tab->HasFocus()) {
new_selected_tab->RequestFocus();
}
old_selected_tab->SetSelected(false);
MaybeUpdateTabContentVisibility(GetIndexForTab(old_selected_tab), false);
OnSelectedTabChanged(old_selected_tab, new_selected_tab, animate);
NotifyNewAccessibilityEvent(ax::mojom::Event::kSelectedChildrenChanged,
true);
}
UpdateAccessibleName();
SchedulePaint();
if (tabbed_pane_) {
tabbed_pane_->MaybeSetFocusedView(new_selected_tab_idx);
}
if (listener()) {
listener()->TabSelectedAt(base::checked_cast<int>(new_selected_tab_idx));
}
return true;
}
void TabbedPaneTabStrip::MaybeUpdateTabContentVisibility(size_t tab_index,
bool visible) {
if (tabbed_pane_) {
tabbed_pane_->SetTabContentVisibility(tab_index, visible);
}
}
void TabbedPaneTabStrip::NotifyNewAccessibilityEvent(
ax::mojom::Event event_type,
bool send_native_event) {
// If this component is part of a TabbedPane, then forward the accessibility
// event to the parent.
if (tabbed_pane_) {
tabbed_pane_->GetViewAccessibility().NotifyEvent(event_type,
send_native_event);
} else {
// Otherwise, make the call ourselves.
GetViewAccessibility().NotifyEvent(event_type, send_native_event);
}
}
bool TabbedPaneTabStrip::MoveSelectionBy(int delta) {
if (children().size() <= 1) {
return false;
}
return SelectTab(GetTabAtDeltaFromSelected(delta));
}
TabbedPaneTab* TabbedPaneTabStrip::GetSelectedTab() const {
size_t index = GetSelectedTabIndex();
return index == kNoSelectedTab ? nullptr : GetTabAtIndex(index);
}
TabbedPaneTab* TabbedPaneTabStrip::GetTabAtDeltaFromSelected(int delta) const {
const size_t selected_tab_index = GetSelectedTabIndex();
DCHECK_NE(kNoSelectedTab, selected_tab_index);
const size_t num_children = children().size();
// Clamping |delta| here ensures that even a large negative |delta| will be
// positive after the addition in the next statement.
delta %= base::checked_cast<int>(num_children);
delta += static_cast<int>(num_children);
return GetTabAtIndex((selected_tab_index + static_cast<size_t>(delta)) %
num_children);
}
TabbedPaneTab* TabbedPaneTabStrip::GetTabAtIndex(size_t index) const {
DCHECK_LT(index, children().size());
return static_cast<TabbedPaneTab*>(children()[index]);
}
size_t TabbedPaneTabStrip::GetIndexForTab(TabbedPaneTab* tab) const {
CHECK(tab);
const auto it = std::ranges::find(children(), tab);
CHECK(it != children().end());
return static_cast<size_t>(it - children().begin());
}
size_t TabbedPaneTabStrip::GetSelectedTabIndex() const {
for (size_t i = 0; i < children().size(); ++i) {
if (GetTabAtIndex(i)->selected()) {
return i;
}
}
return kNoSelectedTab;
}
size_t TabbedPaneTabStrip::GetTabCount() const {
return children().size();
}
void TabbedPaneTabStrip::SetDefaultFlex(int flex) {
static_cast<BoxLayout*>(GetLayoutManager())->SetDefaultFlex(flex);
}
void TabbedPaneTabStrip::SetTabSpacing(int spacing) {
static_cast<BoxLayout*>(GetLayoutManager())
->set_between_child_spacing(spacing);
}
TabbedPane::Orientation TabbedPaneTabStrip::GetOrientation() const {
return orientation_;
}
TabbedPane::TabStripStyle TabbedPaneTabStrip::GetStyle() const {
return style_;
}
bool TabbedPaneTabStrip::HasIconStyle() const {
return GetStyle() == TabbedPane::TabStripStyle::kCompactWithIcon ||
GetStyle() == TabbedPane::TabStripStyle::kWithIcon;
}
void TabbedPaneTabStrip::UpdateAccessibleName() {
// Update parent's accessible name, if its parent exists.
if (tabbed_pane_) {
tabbed_pane_->UpdateAccessibleName();
return;
}
// Otherwise, the TabbedPaneTabStrip is a standalone View, so update
// ourselves.
const TabbedPaneTab* const selected_tab = GetSelectedTab();
if (selected_tab) {
GetViewAccessibility().SetName(
std::u16string(selected_tab->GetTitleText()));
} else {
GetViewAccessibility().RemoveName();
}
}
void TabbedPaneTabStrip::SetDrawTabDivider(bool draw) {
draw_tab_divider_ = draw;
SchedulePaint();
}
void TabbedPaneTabStrip::OnPaintBorder(gfx::Canvas* canvas) {
// Do not draw border line in kHighlight mode.
if (GetStyle() == TabbedPane::TabStripStyle::kHighlight) {
return;
}
// First, draw the unselected border across the TabStrip's entire width or
// height, depending on the orientation of the tab alignment. The area
// underneath or on the right of the selected tab will be overdrawn later.
const bool is_horizontal =
GetOrientation() == TabbedPane::Orientation::kHorizontal;
const bool is_compact_with_icon =
GetStyle() == TabbedPane::TabStripStyle::kCompactWithIcon;
int max_cross_axis;
gfx::Rect rect;
constexpr int kUnselectedBorderThickness = 1;
if (is_horizontal) {
max_cross_axis = children().front()->bounds().bottom();
rect = gfx::Rect(0, max_cross_axis - kUnselectedBorderThickness, width(),
kUnselectedBorderThickness);
} else {
max_cross_axis = width();
rect = gfx::Rect(max_cross_axis - kUnselectedBorderThickness, 0,
kUnselectedBorderThickness, height());
}
if (draw_tab_divider_) {
canvas->FillRect(
rect, GetColorProvider()->GetColor(ui::kColorTabContentSeparator));
}
// No need to draw the selection marker if the tab strip is disabled.
if (!GetEnabled()) {
return;
}
TabbedPaneTab* tab = GetSelectedTab();
if (!tab) {
return;
}
// Now, figure out the range to draw the selection marker underneath. There
// are three states here:
// 1) Expand animation is running: use FAST_OUT_LINEAR_IN to grow the
// selection marker until it encompasses both the previously selected tab
// and the currently selected tab;
// 2) Contract animation is running: use LINEAR_OUT_SLOW_IN to shrink the
// selection marker until it encompasses only the currently selected tab;
// 3) No animations running: the selection marker is only under the currently
// selected tab.
int min_main_axis = 0;
int max_main_axis = 0;
if (expand_animation_->is_animating()) {
bool animating_leading = animating_to_.start < animating_from_.start;
double anim_value = gfx::Tween::CalculateValue(
gfx::Tween::FAST_OUT_LINEAR_IN, expand_animation_->GetCurrentValue());
if (animating_leading) {
min_main_axis = gfx::Tween::IntValueBetween(
anim_value, animating_from_.start, animating_to_.start);
max_main_axis = animating_from_.end;
} else {
min_main_axis = animating_from_.start;
max_main_axis = gfx::Tween::IntValueBetween(
anim_value, animating_from_.end, animating_to_.end);
}
} else if (contract_animation_->is_animating()) {
bool animating_leading = animating_to_.start < animating_from_.start;
double anim_value = gfx::Tween::CalculateValue(
gfx::Tween::LINEAR_OUT_SLOW_IN, contract_animation_->GetCurrentValue());
if (animating_leading) {
min_main_axis = animating_to_.start;
max_main_axis = gfx::Tween::IntValueBetween(
anim_value, animating_from_.end, animating_to_.end);
} else {
min_main_axis = gfx::Tween::IntValueBetween(
anim_value, animating_from_.start, animating_to_.start);
max_main_axis = animating_to_.end;
}
} else if (is_horizontal && is_compact_with_icon) {
const TabbedPaneTabStrip::Coordinates tab_x = GetIconLabelStartEndingX(tab);
min_main_axis = tab->GetMirroredX() + tab_x.start;
max_main_axis = tab->GetMirroredX() + tab_x.end;
} else if (is_horizontal) {
min_main_axis = tab->GetMirroredX();
max_main_axis = min_main_axis + tab->width();
} else {
min_main_axis = tab->bounds().y();
max_main_axis = min_main_axis + tab->height();
}
DCHECK_NE(min_main_axis, max_main_axis);
// Draw over the unselected border from above.
const int kSelectedBorderThickness = is_compact_with_icon ? 8 : 2;
const int stylized_border_thickness = is_compact_with_icon ? 4 : 2;
rect = gfx::Rect(min_main_axis, max_cross_axis - stylized_border_thickness,
max_main_axis - min_main_axis, kSelectedBorderThickness);
if (!is_horizontal) {
rect.Transpose();
}
const SkColor color =
GetColorProvider()->GetColor(ui::kColorTabBorderSelected);
if (is_compact_with_icon) {
const int radius =
LayoutProvider::Get()->GetCornerRadiusMetric(views::Emphasis::kMedium);
cc::PaintFlags flags;
flags.setColor(color);
flags.setAntiAlias(true);
flags.setStyle(cc::PaintFlags::kFill_Style);
flags.setBlendMode(SkBlendMode::kSrcOver);
canvas->DrawRoundRect(rect, static_cast<float>(radius), flags);
} else {
canvas->FillRect(rect, color);
}
}
BEGIN_METADATA(TabbedPaneTabStrip)
ADD_READONLY_PROPERTY_METADATA(size_t, SelectedTabIndex)
ADD_READONLY_PROPERTY_METADATA(TabbedPane::Orientation, Orientation)
ADD_READONLY_PROPERTY_METADATA(TabbedPane::TabStripStyle, Style)
END_METADATA
TabbedPane::TabbedPane(TabbedPane::Orientation orientation,
TabbedPane::TabStripStyle style,
bool scrollable) {
CHECK(IsValidOrientationStyleCombo(orientation, style));
if (orientation == TabbedPane::Orientation::kHorizontal) {
SetOrientation(views::LayoutOrientation::kVertical);
}
auto tab_strip =
std::make_unique<TabbedPaneTabStrip>(orientation, style, this);
if (scrollable) {
scroll_view_ = AddChildView(
std::make_unique<ScrollView>(ScrollView::ScrollWithLayers::kEnabled));
tab_strip_ = tab_strip.get();
scroll_view_->SetContents(std::move(tab_strip));
scroll_view_->ClipHeightTo(0, 0);
} else {
tab_strip_ = AddChildView(std::move(tab_strip));
}
contents_ = AddChildView(std::make_unique<View>());
contents_->SetProperty(
views::kFlexBehaviorKey,
views::FlexSpecification(views::MinimumFlexSizeRule::kScaleToZero,
views::MaximumFlexSizeRule::kUnbounded));
contents_->SetLayoutManager(std::make_unique<views::FillLayout>());
GetViewAccessibility().SetRole(ax::mojom::Role::kTabList);
UpdateAccessibleName();
}
TabbedPane::~TabbedPane() = default;
TabbedPaneListener* TabbedPane::GetListener() const {
return tab_strip_->listener();
}
void TabbedPane::SetListener(TabbedPaneListener* listener) {
tab_strip_->set_listener(listener);
}
size_t TabbedPane::GetSelectedTabIndex() const {
return tab_strip_->GetSelectedTabIndex();
}
size_t TabbedPane::GetTabCount() const {
DCHECK_EQ(tab_strip_->children().size(), contents_->children().size());
return contents_->children().size();
}
void TabbedPane::AddTabInternal(size_t index,
const std::u16string& title,
std::unique_ptr<View> contents,
const gfx::VectorIcon* tab_icon) {
DCHECK_LE(index, GetTabCount());
contents->SetVisible(false);
contents->GetViewAccessibility().SetRole(ax::mojom::Role::kTabPanel);
if (!title.empty()) {
contents->GetViewAccessibility().SetName(title,
ax::mojom::NameFrom::kAttribute);
}
tab_strip_->AddTabAt(title, tab_icon, index);
contents_->AddChildViewAt(std::move(contents), index);
if (!GetSelectedTab()) {
SelectTabAt(index);
}
PreferredSizeChanged();
}
void TabbedPane::SelectTabAt(size_t index, bool animate) {
TabbedPaneTab* tab = tab_strip_->GetTabAtIndex(index);
if (tab) {
tab_strip_->SelectTab(tab, animate);
}
}
void TabbedPane::SetTabContentVisibility(size_t tab_index, bool visible) {
CHECK_LT(tab_index, GetTabCount());
contents_->children()[tab_index]->SetVisible(visible);
contents_->InvalidateLayout();
}
void TabbedPane::MaybeSetFocusedView(size_t tab_index) {
const auto tab_contents = contents_->children()[tab_index];
FocusManager* focus_manager = tab_contents->GetFocusManager();
if (!focus_manager) {
return;
}
if (const View* focused_view = focus_manager->GetFocusedView();
focused_view && contents_->Contains(focused_view) &&
!tab_contents->Contains(focused_view)) {
focus_manager->SetFocusedView(tab_contents);
}
}
ScrollView* TabbedPane::GetScrollView() {
return scroll_view_;
}
TabbedPane::Orientation TabbedPane::GetOrientation() const {
return tab_strip_->GetOrientation();
}
TabbedPane::TabStripStyle TabbedPane::GetStyle() const {
return tab_strip_->GetStyle();
}
TabbedPaneTab* TabbedPane::GetTabAt(size_t index) {
return tab_strip_->GetTabAtIndex(index);
}
const views::View* TabbedPane::GetTabContents(size_t index) const {
CHECK_LT(index, GetTabCount());
return contents_->children()[index];
}
views::View* TabbedPane::GetTabContentsForTesting(size_t index) {
CHECK_LT(index, GetTabCount());
return contents_->children()[index];
}
void TabbedPane::UpdateAccessibleName() {
if (const TabbedPaneTab* const selected_tab = GetSelectedTab()) {
GetViewAccessibility().SetName(
std::u16string(selected_tab->GetTitleText()));
} else {
GetViewAccessibility().RemoveName();
}
}
void TabbedPane::SetDrawTabDivider(bool draw) {
tab_strip_->SetDrawTabDivider(draw);
}
TabbedPaneTab* TabbedPane::GetSelectedTab() {
return tab_strip_->GetSelectedTab();
}
gfx::Size TabbedPane::CalculatePreferredSize(
const SizeBounds& available_size) const {
// In horizontal mode, use the preferred size as determined by the largest
// child or the minimum size necessary to display the tab titles, whichever is
// larger.
if (GetOrientation() == TabbedPane::Orientation::kHorizontal) {
return FlexLayoutView::CalculatePreferredSize(available_size);
}
// In vertical mode, Tabstrips don't require any minimum space along their
// main axis, and can shrink all the way to zero size.
const gfx::Size size =
GetLayoutManager()->GetPreferredSize(this, available_size);
return gfx::Size(size.width(), contents_->GetHeightForWidth(size.width()));
}
BEGIN_METADATA(TabbedPane)
END_METADATA
} // namespace views
DEFINE_ENUM_CONVERTERS(views::TabbedPane::Orientation,
{views::TabbedPane::Orientation::kHorizontal,
u"HORIZONTAL"},
{views::TabbedPane::Orientation::kVertical, u"VERTICAL"})
DEFINE_ENUM_CONVERTERS(views::TabbedPane::TabStripStyle,
{views::TabbedPane::TabStripStyle::kBorder, u"BORDER"},
{views::TabbedPane::TabStripStyle::kHighlight,
u"HIGHLIGHT"})
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