622 lines
22 KiB
C++
622 lines
22 KiB
C++
// Copyright (c) Microsoft Corporation.
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// Licensed under the MIT license.
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#include "pch.h"
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#include "Terminal.hpp"
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#include "../../terminal/parser/OutputStateMachineEngine.hpp"
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#include "TerminalDispatch.hpp"
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#include "../../inc/unicode.hpp"
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#include "../../inc/DefaultSettings.h"
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#include "../../inc/argb.h"
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#include "../../types/inc/utils.hpp"
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#include "winrt/Microsoft.Terminal.Settings.h"
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using namespace winrt::Microsoft::Terminal::Settings;
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using namespace Microsoft::Terminal::Core;
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using namespace Microsoft::Console;
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using namespace Microsoft::Console::Render;
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using namespace Microsoft::Console::Types;
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using namespace Microsoft::Console::VirtualTerminal;
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static std::wstring _KeyEventsToText(std::deque<std::unique_ptr<IInputEvent>>& inEventsToWrite)
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{
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std::wstring wstr = L"";
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for (auto& ev : inEventsToWrite)
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{
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if (ev->EventType() == InputEventType::KeyEvent)
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{
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auto& k = static_cast<KeyEvent&>(*ev);
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auto wch = k.GetCharData();
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wstr += wch;
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}
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}
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return wstr;
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}
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Terminal::Terminal() :
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_mutableViewport{ Viewport::Empty() },
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_title{ L"" },
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_colorTable{},
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_defaultFg{ RGB(255, 255, 255) },
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_defaultBg{ ARGB(0, 0, 0, 0) },
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_pfnWriteInput{ nullptr },
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_scrollOffset{ 0 },
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_snapOnInput{ true },
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_boxSelection{ false },
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_selectionActive{ false },
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_selectionAnchor{ 0, 0 },
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_endSelectionPosition{ 0, 0 }
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{
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_stateMachine = std::make_unique<StateMachine>(new OutputStateMachineEngine(new TerminalDispatch(*this)));
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auto passAlongInput = [&](std::deque<std::unique_ptr<IInputEvent>>& inEventsToWrite) {
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if (!_pfnWriteInput)
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{
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return;
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}
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std::wstring wstr = _KeyEventsToText(inEventsToWrite);
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_pfnWriteInput(wstr);
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};
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_terminalInput = std::make_unique<TerminalInput>(passAlongInput);
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_InitializeColorTable();
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}
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void Terminal::Create(COORD viewportSize, SHORT scrollbackLines, IRenderTarget& renderTarget)
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{
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_mutableViewport = Viewport::FromDimensions({ 0, 0 }, viewportSize);
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_scrollbackLines = scrollbackLines;
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const COORD bufferSize{ viewportSize.X,
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Utils::ClampToShortMax(viewportSize.Y + scrollbackLines, 1) };
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const TextAttribute attr{};
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const UINT cursorSize = 12;
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_buffer = std::make_unique<TextBuffer>(bufferSize, attr, cursorSize, renderTarget);
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}
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// Method Description:
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// - Initializes the Terminal from the given set of settings.
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// Arguments:
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// - settings: the set of CoreSettings we need to use to initialize the terminal
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// - renderTarget: A render target the terminal can use for paint invalidation.
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void Terminal::CreateFromSettings(winrt::Microsoft::Terminal::Settings::ICoreSettings settings,
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Microsoft::Console::Render::IRenderTarget& renderTarget)
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{
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const COORD viewportSize{ Utils::ClampToShortMax(settings.InitialCols(), 1),
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Utils::ClampToShortMax(settings.InitialRows(), 1) };
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// TODO:MSFT:20642297 - Support infinite scrollback here, if HistorySize is -1
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Create(viewportSize, Utils::ClampToShortMax(settings.HistorySize(), 0), renderTarget);
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UpdateSettings(settings);
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}
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// Method Description:
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// - Update our internal properties to match the new values in the provided
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// CoreSettings object.
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// Arguments:
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// - settings: an ICoreSettings with new settings values for us to use.
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void Terminal::UpdateSettings(winrt::Microsoft::Terminal::Settings::ICoreSettings settings)
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{
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_defaultFg = settings.DefaultForeground();
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_defaultBg = settings.DefaultBackground();
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CursorType cursorShape = CursorType::VerticalBar;
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switch (settings.CursorShape())
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{
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case CursorStyle::Underscore:
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cursorShape = CursorType::Underscore;
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break;
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case CursorStyle::FilledBox:
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cursorShape = CursorType::FullBox;
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break;
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case CursorStyle::EmptyBox:
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cursorShape = CursorType::EmptyBox;
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break;
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case CursorStyle::Vintage:
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cursorShape = CursorType::Legacy;
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break;
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default:
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case CursorStyle::Bar:
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cursorShape = CursorType::VerticalBar;
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break;
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}
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_buffer->GetCursor().SetStyle(settings.CursorHeight(),
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settings.CursorColor(),
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cursorShape);
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for (int i = 0; i < 16; i++)
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{
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_colorTable[i] = settings.GetColorTableEntry(i);
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}
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_snapOnInput = settings.SnapOnInput();
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// TODO:MSFT:21327402 - if HistorySize has changed, resize the buffer so we
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// have a smaller scrollback. We should do this carefully - if the new buffer
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// size is smaller than where the mutable viewport currently is, we'll want
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// to make sure to rotate the buffer contents upwards, so the mutable viewport
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// remains at the bottom of the buffer.
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}
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// Method Description:
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// - Resize the terminal as the result of some user interaction.
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// Arguments:
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// - viewportSize: the new size of the viewport, in chars
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// Return Value:
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// - S_OK if we successfully resized the terminal, S_FALSE if there was
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// nothing to do (the viewportSize is the same as our current size), or an
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// appropriate HRESULT for failing to resize.
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[[nodiscard]] HRESULT Terminal::UserResize(const COORD viewportSize) noexcept
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{
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const auto oldDimensions = _mutableViewport.Dimensions();
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if (viewportSize == oldDimensions)
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{
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return S_FALSE;
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}
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const auto oldTop = _mutableViewport.Top();
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const short newBufferHeight = viewportSize.Y + _scrollbackLines;
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COORD bufferSize{ viewportSize.X, newBufferHeight };
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RETURN_IF_FAILED(_buffer->ResizeTraditional(bufferSize));
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auto proposedTop = oldTop;
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const auto newView = Viewport::FromDimensions({ 0, proposedTop }, viewportSize);
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const auto proposedBottom = newView.BottomExclusive();
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// If the new bottom would be below the bottom of the buffer, then slide the
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// top up so that we'll still fit within the buffer.
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if (proposedBottom > bufferSize.Y)
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{
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proposedTop -= (proposedBottom - bufferSize.Y);
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}
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_mutableViewport = Viewport::FromDimensions({ 0, proposedTop }, viewportSize);
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_scrollOffset = 0;
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_NotifyScrollEvent();
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return S_OK;
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}
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void Terminal::Write(std::wstring_view stringView)
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{
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auto lock = LockForWriting();
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_stateMachine->ProcessString(stringView.data(), stringView.size());
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}
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// Method Description:
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// - Send this particular key event to the terminal. The terminal will translate
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// the key and the modifiers pressed into the appropriate VT sequence for that
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// key chord. If we do translate the key, we'll return true. In that case, the
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// event should NOT br processed any further. If we return false, the event
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// was NOT translated, and we should instead use the event to try and get the
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// real character out of the event.
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// Arguments:
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// - vkey: The vkey of the key pressed.
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// - ctrlPressed: true iff either ctrl key is pressed.
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// - altPressed: true iff either alt key is pressed.
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// - shiftPressed: true iff either shift key is pressed.
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// Return Value:
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// - true if we translated the key event, and it should not be processed any further.
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// - false if we did not translate the key, and it should be processed into a character.
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bool Terminal::SendKeyEvent(const WORD vkey,
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const bool ctrlPressed,
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const bool altPressed,
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const bool shiftPressed)
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{
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if (_snapOnInput && _scrollOffset != 0)
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{
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auto lock = LockForWriting();
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_scrollOffset = 0;
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_NotifyScrollEvent();
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}
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DWORD modifiers = 0 |
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(ctrlPressed ? LEFT_CTRL_PRESSED : 0) |
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(altPressed ? LEFT_ALT_PRESSED : 0) |
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(shiftPressed ? SHIFT_PRESSED : 0);
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// Alt key sequences _require_ the char to be in the keyevent. If alt is
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// pressed, manually get the character that's being typed, and put it in the
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// KeyEvent.
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// DON'T manually handle Alt+Space - the system will use this to bring up
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// the system menu for restore, min/maximimize, size, move, close
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wchar_t ch = altPressed && vkey != VK_SPACE ? static_cast<wchar_t>(LOWORD(MapVirtualKey(vkey, MAPVK_VK_TO_CHAR))) : UNICODE_NULL;
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// Manually handle Ctrl+H. Ctrl+H should be handled as Backspace. To do this
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// correctly, the keyEvents's char needs to be set to Backspace.
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// 0x48 is the VKEY for 'H', which isn't named
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if (ctrlPressed && vkey == 0x48)
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{
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ch = UNICODE_BACKSPACE;
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}
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// Manually handle Ctrl+Space here. The terminalInput translator requires
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// the char to be set to Space for space handling to work correctly.
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if (ctrlPressed && vkey == VK_SPACE)
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{
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ch = UNICODE_SPACE;
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}
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const bool manuallyHandled = ch != UNICODE_NULL;
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KeyEvent keyEv{ true, 0, vkey, 0, ch, modifiers };
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const bool translated = _terminalInput->HandleKey(&keyEv);
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return translated && manuallyHandled;
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}
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// Method Description:
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// - Aquire a read lock on the terminal.
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// Return Value:
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// - a shared_lock which can be used to unlock the terminal. The shared_lock
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// will release this lock when it's destructed.
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[[nodiscard]] std::shared_lock<std::shared_mutex> Terminal::LockForReading()
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{
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return std::shared_lock<std::shared_mutex>(_readWriteLock);
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}
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// Method Description:
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// - Aquire a write lock on the terminal.
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// Return Value:
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// - a unique_lock which can be used to unlock the terminal. The unique_lock
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// will release this lock when it's destructed.
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[[nodiscard]] std::unique_lock<std::shared_mutex> Terminal::LockForWriting()
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{
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return std::unique_lock<std::shared_mutex>(_readWriteLock);
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}
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Viewport Terminal::_GetMutableViewport() const noexcept
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{
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return _mutableViewport;
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}
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short Terminal::GetBufferHeight() const noexcept
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{
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return _mutableViewport.BottomExclusive();
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}
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// _ViewStartIndex is also the length of the scrollback
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int Terminal::_ViewStartIndex() const noexcept
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{
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return _mutableViewport.Top();
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}
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// _VisibleStartIndex is the first visible line of the buffer
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int Terminal::_VisibleStartIndex() const noexcept
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{
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return std::max(0, _ViewStartIndex() - _scrollOffset);
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}
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Viewport Terminal::_GetVisibleViewport() const noexcept
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{
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const COORD origin{ 0, gsl::narrow<short>(_VisibleStartIndex()) };
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return Viewport::FromDimensions(origin,
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_mutableViewport.Dimensions());
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}
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// Writes a string of text to the buffer, then moves the cursor (and viewport)
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// in accordance with the written text.
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// This method is our proverbial `WriteCharsLegacy`, and great care should be made to
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// keep it minimal and orderly, lest it become WriteCharsLegacy2ElectricBoogaloo
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// TODO: MSFT 21006766
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// This needs to become stream logic on the buffer itself sooner rather than later
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// because it's otherwise impossible to avoid the Electric Boogaloo-ness here.
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// I had to make a bunch of hacks to get Japanese and emoji to work-ish.
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void Terminal::_WriteBuffer(const std::wstring_view& stringView)
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{
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auto& cursor = _buffer->GetCursor();
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const Viewport bufferSize = _buffer->GetSize();
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for (size_t i = 0; i < stringView.size(); i++)
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{
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wchar_t wch = stringView[i];
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const COORD cursorPosBefore = cursor.GetPosition();
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COORD proposedCursorPosition = cursorPosBefore;
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bool notifyScroll = false;
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if (wch == UNICODE_LINEFEED)
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{
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proposedCursorPosition.Y++;
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}
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else if (wch == UNICODE_CARRIAGERETURN)
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{
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proposedCursorPosition.X = 0;
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}
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else if (wch == UNICODE_BACKSPACE)
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{
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if (cursorPosBefore.X == 0)
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{
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proposedCursorPosition.X = bufferSize.Width() - 1;
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proposedCursorPosition.Y--;
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}
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else
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{
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proposedCursorPosition.X--;
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}
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}
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else
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{
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// TODO: MSFT 21006766
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// This is not great but I need it demoable. Fix by making a buffer stream writer.
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if (wch >= 0xD800 && wch <= 0xDFFF)
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{
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OutputCellIterator it{ stringView.substr(i, 2), _buffer->GetCurrentAttributes() };
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const auto end = _buffer->Write(it);
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const auto cellDistance = end.GetCellDistance(it);
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i += cellDistance - 1;
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proposedCursorPosition.X += gsl::narrow<SHORT>(cellDistance);
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}
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else
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{
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OutputCellIterator it{ stringView.substr(i, 1), _buffer->GetCurrentAttributes() };
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const auto end = _buffer->Write(it);
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const auto cellDistance = end.GetCellDistance(it);
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proposedCursorPosition.X += gsl::narrow<SHORT>(cellDistance);
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}
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}
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// If we're about to scroll past the bottom of the buffer, instead cycle the buffer.
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const auto newRows = proposedCursorPosition.Y - bufferSize.Height() + 1;
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if (newRows > 0)
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{
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for (auto dy = 0; dy < newRows; dy++)
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{
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_buffer->IncrementCircularBuffer();
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proposedCursorPosition.Y--;
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}
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notifyScroll = true;
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}
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// This section is essentially equivalent to `AdjustCursorPosition`
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// Update Cursor Position
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cursor.SetPosition(proposedCursorPosition);
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const COORD cursorPosAfter = cursor.GetPosition();
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// Move the viewport down if the cursor moved below the viewport.
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if (cursorPosAfter.Y > _mutableViewport.BottomInclusive())
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{
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const auto newViewTop = std::max(0, cursorPosAfter.Y - (_mutableViewport.Height() - 1));
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if (newViewTop != _mutableViewport.Top())
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{
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_mutableViewport = Viewport::FromDimensions({ 0, gsl::narrow<short>(newViewTop) }, _mutableViewport.Dimensions());
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notifyScroll = true;
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}
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}
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if (notifyScroll)
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{
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_buffer->GetRenderTarget().TriggerRedrawAll();
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_NotifyScrollEvent();
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}
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}
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}
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void Terminal::UserScrollViewport(const int viewTop)
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{
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const auto clampedNewTop = std::max(0, viewTop);
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const auto realTop = _ViewStartIndex();
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const auto newDelta = realTop - clampedNewTop;
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// if viewTop > realTop, we want the offset to be 0.
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_scrollOffset = std::max(0, newDelta);
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_buffer->GetRenderTarget().TriggerRedrawAll();
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}
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int Terminal::GetScrollOffset()
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{
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return _VisibleStartIndex();
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}
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void Terminal::_NotifyScrollEvent()
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{
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if (_pfnScrollPositionChanged)
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{
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const auto visible = _GetVisibleViewport();
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const auto top = visible.Top();
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const auto height = visible.Height();
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const auto bottom = this->GetBufferHeight();
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_pfnScrollPositionChanged(top, height, bottom);
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}
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}
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void Terminal::SetWriteInputCallback(std::function<void(std::wstring&)> pfn) noexcept
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{
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_pfnWriteInput = pfn;
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}
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void Terminal::SetTitleChangedCallback(std::function<void(const std::wstring_view&)> pfn) noexcept
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{
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_pfnTitleChanged = pfn;
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}
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void Terminal::SetScrollPositionChangedCallback(std::function<void(const int, const int, const int)> pfn) noexcept
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{
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_pfnScrollPositionChanged = pfn;
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}
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// Method Description:
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// - Allows setting a callback for when the background color is changed
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// Arguments:
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// - pfn: a function callback that takes a uint32 (DWORD COLORREF) color in the format 0x00BBGGRR
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void Terminal::SetBackgroundCallback(std::function<void(const uint32_t)> pfn) noexcept
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{
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_pfnBackgroundColorChanged = pfn;
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}
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// Method Description:
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// - Checks if selection is active
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// Return Value:
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// - bool representing if selection is active. Used to decide copy/paste on right click
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const bool Terminal::IsSelectionActive() const noexcept
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{
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return _selectionActive;
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}
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// Method Description:
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// - Record the position of the beginning of a selection
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// Arguments:
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// - position: the (x,y) coordinate on the visible viewport
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void Terminal::SetSelectionAnchor(const COORD position)
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{
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_selectionAnchor = position;
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// include _scrollOffset here to ensure this maps to the right spot of the original viewport
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THROW_IF_FAILED(ShortSub(_selectionAnchor.Y, gsl::narrow<SHORT>(_scrollOffset), &_selectionAnchor.Y));
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// copy value of ViewStartIndex to support scrolling
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// and update on new buffer output (used in _GetSelectionRects())
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_selectionAnchor_YOffset = gsl::narrow<SHORT>(_ViewStartIndex());
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_selectionActive = true;
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SetEndSelectionPosition(position);
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}
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// Method Description:
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// - Record the position of the end of a selection
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// Arguments:
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// - position: the (x,y) coordinate on the visible viewport
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void Terminal::SetEndSelectionPosition(const COORD position)
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{
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_endSelectionPosition = position;
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// include _scrollOffset here to ensure this maps to the right spot of the original viewport
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THROW_IF_FAILED(ShortSub(_endSelectionPosition.Y, gsl::narrow<SHORT>(_scrollOffset), &_endSelectionPosition.Y));
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// copy value of ViewStartIndex to support scrolling
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// and update on new buffer output (used in _GetSelectionRects())
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_endSelectionPosition_YOffset = gsl::narrow<SHORT>(_ViewStartIndex());
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}
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void Terminal::_InitializeColorTable()
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{
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gsl::span<COLORREF> tableView = { &_colorTable[0], gsl::narrow<ptrdiff_t>(_colorTable.size()) };
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// First set up the basic 256 colors
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Utils::Initialize256ColorTable(tableView);
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// Then use fill the first 16 values with the Campbell scheme
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Utils::InitializeCampbellColorTable(tableView);
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// Then make sure all the values have an alpha of 255
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Utils::SetColorTableAlpha(tableView, 0xff);
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}
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// Method Description:
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// - Helper to determine the selected region of the buffer. Used for rendering.
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// Return Value:
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// - A vector of rectangles representing the regions to select, line by line. They are absolute coordinates relative to the buffer origin.
|
|
std::vector<SMALL_RECT> Terminal::_GetSelectionRects() const
|
|
{
|
|
std::vector<SMALL_RECT> selectionArea;
|
|
|
|
if (!_selectionActive)
|
|
{
|
|
return selectionArea;
|
|
}
|
|
|
|
// Add anchor offset here to update properly on new buffer output
|
|
SHORT temp1, temp2;
|
|
THROW_IF_FAILED(ShortAdd(_selectionAnchor.Y, _selectionAnchor_YOffset, &temp1));
|
|
THROW_IF_FAILED(ShortAdd(_endSelectionPosition.Y, _endSelectionPosition_YOffset, &temp2));
|
|
|
|
// create these new anchors for comparison and rendering
|
|
const COORD selectionAnchorWithOffset = { _selectionAnchor.X, temp1 };
|
|
const COORD endSelectionPositionWithOffset = { _endSelectionPosition.X, temp2 };
|
|
|
|
// NOTE: (0,0) is top-left so vertical comparison is inverted
|
|
const COORD& higherCoord = (selectionAnchorWithOffset.Y <= endSelectionPositionWithOffset.Y) ?
|
|
selectionAnchorWithOffset :
|
|
endSelectionPositionWithOffset;
|
|
const COORD& lowerCoord = (selectionAnchorWithOffset.Y > endSelectionPositionWithOffset.Y) ?
|
|
selectionAnchorWithOffset :
|
|
endSelectionPositionWithOffset;
|
|
|
|
selectionArea.reserve(lowerCoord.Y - higherCoord.Y + 1);
|
|
for (auto row = higherCoord.Y; row <= lowerCoord.Y; row++)
|
|
{
|
|
SMALL_RECT selectionRow;
|
|
|
|
selectionRow.Top = row;
|
|
selectionRow.Bottom = row;
|
|
|
|
if (_boxSelection || higherCoord.Y == lowerCoord.Y)
|
|
{
|
|
selectionRow.Left = std::min(higherCoord.X, lowerCoord.X);
|
|
selectionRow.Right = std::max(higherCoord.X, lowerCoord.X);
|
|
}
|
|
else
|
|
{
|
|
selectionRow.Left = (row == higherCoord.Y) ? higherCoord.X : 0;
|
|
selectionRow.Right = (row == lowerCoord.Y) ? lowerCoord.X : _buffer->GetSize().RightInclusive();
|
|
}
|
|
|
|
selectionArea.emplace_back(selectionRow);
|
|
}
|
|
return selectionArea;
|
|
}
|
|
|
|
// Method Description:
|
|
// - enable/disable box selection (ALT + selection)
|
|
// Arguments:
|
|
// - isEnabled: new value for _boxSelection
|
|
void Terminal::SetBoxSelection(const bool isEnabled) noexcept
|
|
{
|
|
_boxSelection = isEnabled;
|
|
}
|
|
|
|
// Method Description:
|
|
// - clear selection data and disable rendering it
|
|
void Terminal::ClearSelection() noexcept
|
|
{
|
|
_selectionActive = false;
|
|
_selectionAnchor = { 0, 0 };
|
|
_endSelectionPosition = { 0, 0 };
|
|
_selectionAnchor_YOffset = 0;
|
|
_endSelectionPosition_YOffset = 0;
|
|
|
|
_buffer->GetRenderTarget().TriggerSelection();
|
|
}
|
|
|
|
// Method Description:
|
|
// - get wstring text from highlighted portion of text buffer
|
|
// Arguments:
|
|
// - trimTrailingWhitespace: enable removing any whitespace from copied selection
|
|
// and get text to appear on separate lines.
|
|
// Return Value:
|
|
// - wstring text from buffer. If extended to multiple lines, each line is separated by \r\n
|
|
const std::wstring Terminal::RetrieveSelectedTextFromBuffer(bool trimTrailingWhitespace) const
|
|
{
|
|
std::function<COLORREF(TextAttribute&)> GetForegroundColor = std::bind(&Terminal::GetForegroundColor, this, std::placeholders::_1);
|
|
std::function<COLORREF(TextAttribute&)> GetBackgroundColor = std::bind(&Terminal::GetBackgroundColor, this, std::placeholders::_1);
|
|
|
|
auto data = _buffer->GetTextForClipboard(!_boxSelection,
|
|
trimTrailingWhitespace,
|
|
_GetSelectionRects(),
|
|
GetForegroundColor,
|
|
GetBackgroundColor);
|
|
|
|
std::wstring result;
|
|
for (const auto& text : data.text)
|
|
{
|
|
result += text;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
// Method Description:
|
|
// - Sets the visibility of the text cursor.
|
|
// Arguments:
|
|
// - isVisible: whether the cursor should be visible
|
|
void Terminal::SetCursorVisible(const bool isVisible) noexcept
|
|
{
|
|
auto& cursor = _buffer->GetCursor();
|
|
cursor.SetIsVisible(isVisible);
|
|
}
|
|
|
|
bool Terminal::IsCursorBlinkingAllowed() const noexcept
|
|
{
|
|
const auto& cursor = _buffer->GetCursor();
|
|
return cursor.IsBlinkingAllowed();
|
|
}
|