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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_UI_VIEWS_TABS_TAB_CONTAINER_CONTROLLER_H_
#define CHROME_BROWSER_UI_VIEWS_TABS_TAB_CONTAINER_CONTROLLER_H_
#include <optional>
#include "ui/base/ui_base_types.h"
#include "ui/gfx/geometry/rect.h"
#include "ui/gfx/range/range.h"
namespace tab_groups {
class TabGroupId;
} // namespace tab_groups
namespace views {
class View;
}
class TabSlotView;
// Model/Controller for the TabContainer.
// NOTE: All indices used by this class are in model coordinates.
class TabContainerController {
public:
virtual ~TabContainerController() = default;
// Returns true if `index` is a valid model index.
virtual bool IsValidModelIndex(int index) const = 0;
// Returns the index of the active tab.
virtual std::optional<int> GetActiveIndex() const = 0;
// Returns the number of pinned tabs in the model. Note that this can be
// different from the number of pinned tabs in the TabStrip view (and its
// associated classes) when a tab is being opened, closed, pinned or unpinned.
virtual int NumPinnedTabsInModel() const = 0;
// Notifies controller of a drop index update.
virtual void OnDropIndexUpdate(std::optional<int> index,
bool drop_before) = 0;
// Returns the `group` collapsed state. Returns false if the group does not
// exist or is not collapsed.
// NOTE: This method signature is duplicated in TabStripController; the
// methods are intended to have equivalent semantics so they can share an
// implementation.
virtual bool IsGroupCollapsed(const tab_groups::TabGroupId& group) const = 0;
// Gets the first tab index in `group`, or nullopt if the group is
// currently empty. This is always safe to call unlike
// ListTabsInGroup().
virtual std::optional<int> GetFirstTabInGroup(
const tab_groups::TabGroupId& group) const = 0;
// Returns the range of tabs in the given `group`. This must not be
// called during intermediate states where the group is not
// contiguous. For example, if tabs elsewhere in the tab strip are
// being moved into `group` it may not be contiguous; this method
// cannot be called.
virtual gfx::Range ListTabsInGroup(
const tab_groups::TabGroupId& group) const = 0;
// Whether the window drag handle area can be extended to include the top of
// inactive tabs.
virtual bool CanExtendDragHandle() const = 0;
// Tab closing mode should remain active as long as the mouse is in or near
// this view. See `TabContainerImpl::in_tab_close_` for more details on tab
// closing mode.
virtual const views::View* GetTabClosingModeMouseWatcherHostView() const = 0;
// Returns true if any tabs are being animated, anywhere in the TabStrip.
virtual bool IsAnimatingInTabStrip() const = 0;
// Retargets the animation of `tab_slot_view` to
// `target_bounds_in_tab_container_coords`, without disrupting its timing.
virtual void UpdateAnimationTarget(
TabSlotView* tab_slot_view,
gfx::Rect target_bounds_in_tab_container_coords) = 0;
};
#endif // CHROME_BROWSER_UI_VIEWS_TABS_TAB_CONTAINER_CONTROLLER_H_
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