c33a97955f
This PR adds a sample monarch/peasant application. This is a type of application where a single "Monarch" can coordinate the actions of multiple other "Peasant" processes, as described by the specs in #7240 and #8135. This project is intended to be a standalone sample of how the architecture would work, without involving the entirety of the Windows Terminal build. Eventually, this architecture will be incorporated into `wt.exe` itself, to enable scenarios like: * Run `wt` in the current window (#4472) * Single Instance Mode (#2227) For an example of this sample running, see the below GIF:  This sample operates largely by printing to the console, to help the reader understand how it's working through its logic. I'm doing this mostly so we can have a _committed_ sample of this type of application, kinda like how VtPipeTerm is a sample ConPTY application. It's a lot easier to understand (& build on) when there aren't any window shenanigans, settings loading, Island instantiation, or anything else that the whole of `WindowsTerminal.exe` needs * [x] I work here * [x] This is sample code, so I'm not shipping tests for it. * [x] Go see the doc over in #8135
109 lines
3.3 KiB
C++
109 lines
3.3 KiB
C++
#include "pch.h"
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#include "AppState.h"
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#include "../../types/inc/utils.hpp"
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bool peasantReadInput(AppState& state)
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{
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DWORD cNumRead, i;
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std::array<INPUT_RECORD, 128> irInBuf;
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if (!ReadConsoleInput(state.hInput, // input buffer handle
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irInBuf.data(), // buffer to read into
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static_cast<DWORD>(irInBuf.size()), // size of read buffer
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&cNumRead)) // number of records read
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{
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printf("\x1b[31mReadConsoleInput failed\x1b[m\n");
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ExitProcess(0);
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}
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for (i = 0; i < cNumRead; i++)
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{
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switch (irInBuf[i].EventType)
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{
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case KEY_EVENT: // keyboard input
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{
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auto key = irInBuf[i].Event.KeyEvent;
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if (key.bKeyDown == false &&
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key.uChar.UnicodeChar == L'q')
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{
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return true;
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}
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else
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{
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printf("This window was activated\n");
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winrt::com_ptr<winrt::MonarchPeasantSample::implementation::Peasant> peasantImpl;
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peasantImpl.copy_from(winrt::get_self<winrt::MonarchPeasantSample::implementation::Peasant>(state.peasant));
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if (peasantImpl)
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{
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peasantImpl->raiseActivatedEvent();
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}
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}
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break;
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}
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case MOUSE_EVENT:
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case WINDOW_BUFFER_SIZE_EVENT:
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case FOCUS_EVENT:
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case MENU_EVENT:
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break;
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default:
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printf("\x1b[33mUnknown event from ReadConsoleInput - this is probably impossible\x1b[m\n");
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ExitProcess(0);
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break;
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}
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}
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return false;
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}
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// Returns true if we want to just exit the application.
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// Returns false if the monarch dies, and we need to elect a new one.
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bool peasantAppLoop(AppState& state)
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{
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wil::unique_handle hMonarch{ OpenProcess(PROCESS_ALL_ACCESS, FALSE, static_cast<DWORD>(state.monarch.GetPID())) };
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if (hMonarch.get() == nullptr)
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{
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const auto gle = GetLastError();
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printf("\x1b[31mFailed to open the monarch process, error was %d\x1b[m\n", gle);
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return false;
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}
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HANDLE handlesToWaitOn[2]{ hMonarch.get(), state.hInput };
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bool exitRequested = false;
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printf("Press `q` to quit\n");
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while (!exitRequested)
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{
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auto waitResult = WaitForMultipleObjects(2, handlesToWaitOn, false, INFINITE);
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switch (waitResult)
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{
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case WAIT_OBJECT_0 + 0: // handlesToWaitOn[0] was signaled
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printf("THE KING IS \x1b[31mDEAD\x1b[m\n");
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// Return false here - this will trigger us to find the new monarch
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return false;
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case WAIT_OBJECT_0 + 1: // handlesToWaitOn[1] was signaled
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exitRequested = peasantReadInput(state);
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break;
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case WAIT_TIMEOUT:
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printf("Wait timed out. This should be impossible.\n");
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break;
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// Return value is invalid.
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default:
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{
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auto gle = GetLastError();
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printf("WaitForMultipleObjects returned: %d\n", waitResult);
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printf("Wait error: %d\n", gle);
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ExitProcess(0);
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}
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}
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}
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printf("Bottom of peasantAppLoop\n");
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return true;
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}
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