209 lines
8.8 KiB
C++
209 lines
8.8 KiB
C++
// Copyright (c) Microsoft Corporation.
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// Licensed under the MIT license.
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//
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// Module Name:
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// - Pane.h
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//
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// Abstract:
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// - Panes are an abstraction by which the terminal can display multiple terminal
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// instances simultaneously in a single terminal window. While tabs allow for
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// a single terminal window to have many terminal sessions running
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// simultaneously within a single window, only one tab can be visible at a
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// time. Panes, on the other hand, allow a user to have many different
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// terminal sessions visible to the user within the context of a single window
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// at the same time. This can enable greater productivity from the user, as
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// they can see the output of one terminal window while working in another.
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// - See doc/cascadia/Panes.md for a detailed description.
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//
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// Author:
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// - Mike Griese (zadjii-msft) 16-May-2019
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#pragma once
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#include <winrt/Microsoft.Terminal.TerminalControl.h>
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#include <winrt/TerminalApp.h>
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#include "../../cascadia/inc/cppwinrt_utils.h"
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enum class Borders : int
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{
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None = 0x0,
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Top = 0x1,
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Bottom = 0x2,
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Left = 0x4,
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Right = 0x8
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};
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DEFINE_ENUM_FLAG_OPERATORS(Borders);
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class Pane : public std::enable_shared_from_this<Pane>
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{
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public:
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Pane(const GUID& profile,
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const winrt::Microsoft::Terminal::TerminalControl::TermControl& control,
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const bool lastFocused = false);
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std::shared_ptr<Pane> GetActivePane();
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winrt::Microsoft::Terminal::TerminalControl::TermControl GetTerminalControl();
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std::optional<GUID> GetFocusedProfile();
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winrt::Windows::UI::Xaml::Controls::Grid GetRootElement();
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bool WasLastFocused() const noexcept;
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void UpdateVisuals();
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void ClearActive();
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void SetActive();
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void UpdateSettings(const winrt::Microsoft::Terminal::Settings::TerminalSettings& settings,
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const GUID& profile);
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void ResizeContent(const winrt::Windows::Foundation::Size& newSize);
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void Relayout();
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bool ResizePane(const winrt::TerminalApp::Direction& direction);
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bool NavigateFocus(const winrt::TerminalApp::Direction& direction);
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bool CanSplit(winrt::TerminalApp::SplitState splitType);
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std::pair<std::shared_ptr<Pane>, std::shared_ptr<Pane>> Split(winrt::TerminalApp::SplitState splitType,
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const GUID& profile,
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const winrt::Microsoft::Terminal::TerminalControl::TermControl& control);
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float CalcSnappedDimension(const bool widthOrHeight, const float dimension) const;
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void Shutdown();
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void Close();
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WINRT_CALLBACK(Closed, winrt::Windows::Foundation::EventHandler<winrt::Windows::Foundation::IInspectable>);
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DECLARE_EVENT(GotFocus, _GotFocusHandlers, winrt::delegate<std::shared_ptr<Pane>>);
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private:
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struct SnapSizeResult;
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struct SnapChildrenSizeResult;
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struct LayoutSizeNode;
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winrt::Windows::UI::Xaml::Controls::Grid _root{};
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winrt::Windows::UI::Xaml::Controls::Border _border{};
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winrt::Microsoft::Terminal::TerminalControl::TermControl _control{ nullptr };
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static winrt::Windows::UI::Xaml::Media::SolidColorBrush s_focusedBorderBrush;
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static winrt::Windows::UI::Xaml::Media::SolidColorBrush s_unfocusedBorderBrush;
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std::shared_ptr<Pane> _firstChild{ nullptr };
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std::shared_ptr<Pane> _secondChild{ nullptr };
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winrt::TerminalApp::SplitState _splitState{ winrt::TerminalApp::SplitState::None };
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float _desiredSplitPosition;
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bool _lastActive{ false };
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std::optional<GUID> _profile{ std::nullopt };
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winrt::event_token _connectionStateChangedToken{ 0 };
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winrt::event_token _firstClosedToken{ 0 };
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winrt::event_token _secondClosedToken{ 0 };
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winrt::Windows::UI::Xaml::UIElement::GotFocus_revoker _gotFocusRevoker;
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std::shared_mutex _createCloseLock{};
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Borders _borders{ Borders::None };
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bool _IsLeaf() const noexcept;
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bool _HasFocusedChild() const noexcept;
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void _SetupChildCloseHandlers();
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bool _CanSplit(winrt::TerminalApp::SplitState splitType);
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std::pair<std::shared_ptr<Pane>, std::shared_ptr<Pane>> _Split(winrt::TerminalApp::SplitState splitType,
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const GUID& profile,
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const winrt::Microsoft::Terminal::TerminalControl::TermControl& control);
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void _CreateRowColDefinitions(const winrt::Windows::Foundation::Size& rootSize);
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void _CreateSplitContent();
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void _ApplySplitDefinitions();
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void _UpdateBorders();
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bool _Resize(const winrt::TerminalApp::Direction& direction);
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bool _NavigateFocus(const winrt::TerminalApp::Direction& direction);
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void _CloseChild(const bool closeFirst);
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winrt::fire_and_forget _CloseChildRoutine(const bool closeFirst);
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void _FocusFirstChild();
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void _ControlConnectionStateChangedHandler(const winrt::Microsoft::Terminal::TerminalControl::TermControl& sender, const winrt::Windows::Foundation::IInspectable& /*args*/);
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void _ControlGotFocusHandler(winrt::Windows::Foundation::IInspectable const& sender,
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winrt::Windows::UI::Xaml::RoutedEventArgs const& e);
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std::pair<float, float> _CalcChildrenSizes(const float fullSize) const;
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SnapChildrenSizeResult _CalcSnappedChildrenSizes(const bool widthOrHeight, const float fullSize) const;
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SnapSizeResult _CalcSnappedDimension(const bool widthOrHeight, const float dimension) const;
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void _AdvanceSnappedDimension(const bool widthOrHeight, LayoutSizeNode& sizeNode) const;
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winrt::Windows::Foundation::Size _GetMinSize() const;
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LayoutSizeNode _CreateMinSizeTree(const bool widthOrHeight) const;
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float _ClampSplitPosition(const bool widthOrHeight, const float requestedValue, const float totalSize) const;
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winrt::TerminalApp::SplitState _convertAutomaticSplitState(const winrt::TerminalApp::SplitState& splitType) const;
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// Function Description:
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// - Returns true if the given direction can be used with the given split
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// type.
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// - This is used for pane resizing (which will need a pane separator
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// that's perpendicular to the direction to be able to move the separator
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// in that direction).
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// - Additionally, it will be used for moving focus between panes, which
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// again happens _across_ a separator.
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// Arguments:
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// - direction: The Direction to compare
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// - splitType: The winrt::TerminalApp::SplitState to compare
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// Return Value:
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// - true iff the direction is perpendicular to the splitType. False for
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// winrt::TerminalApp::SplitState::None.
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static constexpr bool DirectionMatchesSplit(const winrt::TerminalApp::Direction& direction,
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const winrt::TerminalApp::SplitState& splitType)
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{
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if (splitType == winrt::TerminalApp::SplitState::None)
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{
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return false;
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}
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else if (splitType == winrt::TerminalApp::SplitState::Horizontal)
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{
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return direction == winrt::TerminalApp::Direction::Up ||
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direction == winrt::TerminalApp::Direction::Down;
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}
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else if (splitType == winrt::TerminalApp::SplitState::Vertical)
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{
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return direction == winrt::TerminalApp::Direction::Left ||
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direction == winrt::TerminalApp::Direction::Right;
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}
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return false;
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}
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static void _SetupResources();
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struct SnapSizeResult
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{
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float lower;
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float higher;
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};
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struct SnapChildrenSizeResult
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{
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std::pair<float, float> lower;
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std::pair<float, float> higher;
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};
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// Helper structure that builds a (roughly) binary tree corresponding
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// to the pane tree. Used for layouting panes with snapped sizes.
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struct LayoutSizeNode
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{
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float size;
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bool isMinimumSize;
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std::unique_ptr<LayoutSizeNode> firstChild;
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std::unique_ptr<LayoutSizeNode> secondChild;
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// These two fields hold next possible snapped values of firstChild and
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// secondChild. Although that could be calculated from these fields themselves,
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// it would be wasteful as we have to know these values more often than for
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// simple increment. Hence we cache that here.
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std::unique_ptr<LayoutSizeNode> nextFirstChild;
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std::unique_ptr<LayoutSizeNode> nextSecondChild;
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LayoutSizeNode(const float minSize);
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LayoutSizeNode(const LayoutSizeNode& other);
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LayoutSizeNode& operator=(const LayoutSizeNode& other);
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private:
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void _AssignChildNode(std::unique_ptr<LayoutSizeNode>& nodeField, const LayoutSizeNode* const newNode);
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};
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};
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