602 lines
17 KiB
C++
602 lines
17 KiB
C++
#include "gl3w.h"
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#include "Window.h"
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#include "Runtime.h"
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#include "BufferPane.h"
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#include <iostream>
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#include "jes_icon-32x32.h"
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#define INITIAL_WIDTH 800
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#define INITIAL_HEIGHT 800
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#define FONT_SIZE 16
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struct
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{
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SDL_TimerID timer_id;
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SDL_Keycode keysym;
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bool pressed;
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bool event_pending;
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} Key_Statuses[SDL_NUM_SCANCODES];
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/**
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* Initialize SDL.
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*
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* @retval true SDL was loaded successfully.
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* @retval false Loading SDL failed.
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*/
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static bool Initialize_SDL()
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{
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static bool initialized = false;
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if (initialized)
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{
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return true;
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}
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if (SDL_Init(SDL_INIT_VIDEO | SDL_INIT_TIMER) != 0)
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{
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return false;
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}
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atexit(SDL_Quit);
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initialized = true;
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return true;
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}
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/**
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* Initialize OpenGL.
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*
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* @retval true OpenGL was loaded successfully.
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* @retval false Loading OpenGL failed.
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*/
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static bool Initialize_OpenGL()
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{
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if (gl3wInit() != 0)
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{
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std::cerr << "Failed to initialize gl3w." << std::endl;
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/* Failed to gl3wInit() */
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return false;
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}
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if (!gl3wIsSupported(3, 0))
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{
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std::cerr << "Error: OpenGL 3.0 is required." << std::endl;
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std::cerr << "OpenGL version: "
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<< glGetString(GL_VERSION)
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<< ", GLSL: "
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<< glGetString(GL_SHADING_LANGUAGE_VERSION)
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<< std::endl;
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/* OpenGL 3.0 is not supported */
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return false;
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}
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glActiveTexture(GL_TEXTURE0);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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return true;
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}
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void Window::set_window_icon()
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{
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SDL_Surface * surface = SDL_CreateRGBSurfaceFrom((void *)jes_icon_32x32, 32, 32, 24, 32 * 3, 0xFF0000u, 0xFF00u, 0xFFu, 0u);
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SDL_SetWindowIcon(m_window, surface);
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SDL_FreeSurface(surface);
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}
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/**
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* Create a Window.
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*
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* @retval true The Window was created successfully.
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* @retval false There was an error while creating the Window.
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*/
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bool Window::create(std::shared_ptr<Buffer> buffer)
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{
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if (!Initialize_SDL())
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{
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std::cerr << "Error initializing SDL" << std::endl;
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return false;
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}
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m_window = SDL_CreateWindow(
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APPNAME,
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SDL_WINDOWPOS_UNDEFINED,
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SDL_WINDOWPOS_UNDEFINED,
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INITIAL_WIDTH,
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INITIAL_HEIGHT,
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SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE);
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if (m_window == NULL)
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{
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std::cerr << "Error creating SDL window" << std::endl;
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return false;
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}
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set_window_icon();
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(void)SDL_GL_CreateContext(m_window);
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if (!Initialize_OpenGL())
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{
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std::cerr << "Error initializing OpenGL" << std::endl;
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return false;
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}
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m_exit_requested = false;
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/* TODO: user configurable font, size */
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std::string font_path = Runtime::find(Runtime::FONT, "DejaVuSansMono");
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if (font_path == "")
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{
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std::cerr << "Unable to locate font" << std::endl;
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return false;
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}
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m_font = std::make_shared<Font>();
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if (!m_font->load(font_path.c_str(), FONT_SIZE))
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{
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std::cerr << "Error loading font" << std::endl;
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return false;
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}
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m_gl = std::make_shared<GL>();
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m_target_column = 0u; /* TODO: fix */
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glClearColor (0.0, 0.0, 0.0, 0.0);
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m_buffer_pane = std::make_shared<BufferPane>(this, buffer);
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m_focused_buffer_pane = m_buffer_pane;
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m_buffer_pane->set_focused(true);
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m_command_buffer = std::make_shared<Buffer>();
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m_command_buffer_pane = std::make_shared<BufferPane>(this, m_command_buffer);
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m_command_buffer_pane->set_command_mode();
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m_command_buffer_screen_rows = 1;
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resize();
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return true;
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}
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/**
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* Run the Window event loop.
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*
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* TODO: make this a static method to support multiple GUI windows.
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*/
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void Window::run_event_loop()
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{
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SDL_Event event;
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while ((!m_exit_requested) && SDL_WaitEvent(&event))
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{
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handle_event(event);
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if (m_redraw_requested)
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{
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m_redraw_requested = false;
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redraw();
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}
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}
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}
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Uint32 Key_Repeat(Uint32 interval, void * param)
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{
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if (Key_Statuses[(uintptr_t)param].pressed)
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{
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if (!Key_Statuses[(uintptr_t)param].event_pending)
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{
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SDL_Event event;
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event.user.code = 0;
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event.user.data1 = (void *)(uintptr_t)Key_Statuses[(uintptr_t)param].keysym;
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event.user.data2 = param;
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event.type = SDL_USEREVENT;
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SDL_PushEvent(&event);
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Key_Statuses[(uintptr_t)param].event_pending = true;
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}
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return 25u;
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}
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else
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{
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return 0u;
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}
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}
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/**
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* Handle a SDL event.
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*/
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void Window::handle_event(SDL_Event & event)
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{
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switch (event.type)
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{
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case SDL_QUIT:
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m_exit_requested = true;
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break;
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case SDL_KEYDOWN:
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m_keymod = event.key.keysym.mod;
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if (event.key.repeat == 0)
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{
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Key_Statuses[event.key.keysym.scancode].pressed = true;
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Key_Statuses[event.key.keysym.scancode].keysym = event.key.keysym.sym;
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Key_Statuses[event.key.keysym.scancode].timer_id = SDL_AddTimer(300, Key_Repeat, (void *)event.key.keysym.scancode);
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handle_keysym(event.key.keysym.sym);
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}
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break;
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case SDL_KEYUP:
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m_keymod = event.key.keysym.mod;
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Key_Statuses[event.key.keysym.scancode].pressed = false;
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if (Key_Statuses[event.key.keysym.scancode].timer_id != 0)
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{
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SDL_RemoveTimer(Key_Statuses[event.key.keysym.scancode].timer_id);
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Key_Statuses[event.key.keysym.scancode].timer_id = 0;
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}
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break;
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case SDL_WINDOWEVENT:
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switch (event.window.event)
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{
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case SDL_WINDOWEVENT_EXPOSED:
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redraw();
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break;
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case SDL_WINDOWEVENT_RESIZED:
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resize();
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redraw();
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break;
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}
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break;
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case SDL_USEREVENT:
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Key_Statuses[(uintptr_t)event.user.data2].event_pending = false;
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handle_keysym((uint32_t)(uintptr_t)event.user.data1);
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break;
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case SDL_MOUSEWHEEL:
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if (event.wheel.y > 0)
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{
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m_focused_buffer_pane->scroll_window_up(ScrollMode::WHEEL);
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}
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else
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{
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m_focused_buffer_pane->scroll_window_down(ScrollMode::WHEEL);
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}
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break;
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}
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}
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void Window::handle_keysym(uint32_t keysym)
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{
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handle_keyval(get_keyval(keysym));
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}
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void Window::handle_keyval(uint32_t keyval)
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{
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switch (keyval)
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{
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case SDLK_HOME:
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m_focused_buffer_pane->cursor_move(BufferPane::CursorMovement::SOL);
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break;
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case SDLK_END:
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m_focused_buffer_pane->cursor_move(BufferPane::CursorMovement::EOL);
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break;
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case SDLK_RIGHT:
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m_focused_buffer_pane->cursor_move(BufferPane::CursorMovement::RIGHT);
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break;
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case SDLK_LEFT:
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m_focused_buffer_pane->cursor_move(BufferPane::CursorMovement::LEFT);
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break;
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case SDLK_DOWN:
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m_focused_buffer_pane->cursor_move(BufferPane::CursorMovement::DOWN);
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break;
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case SDLK_UP:
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m_focused_buffer_pane->cursor_move(BufferPane::CursorMovement::UP);
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break;
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case SDLK_PAGEUP:
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m_focused_buffer_pane->scroll_window_up(ScrollMode::WHOLE_SCREEN);
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break;
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case SDLK_PAGEDOWN:
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m_focused_buffer_pane->scroll_window_down(ScrollMode::WHOLE_SCREEN);
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break;
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default:
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if (m_focused_buffer_pane->insert_mode())
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{
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if (keyval == '\033')
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{
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if (m_focused_buffer_pane == m_command_buffer_pane)
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{
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m_command_buffer_pane->clear();
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m_command_buffer_screen_rows = 1;
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change_focus(m_buffer_pane);
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}
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else
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{
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m_focused_buffer_pane->exit_insert_mode();
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}
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}
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else if (keyval < 0xFFu)
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{
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if ((keyval == '\n') && (m_focused_buffer_pane == m_command_buffer_pane))
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{
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EncodedString command = m_command_buffer->get_string();
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m_command_buffer_pane->clear();
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m_command_buffer_screen_rows = 1;
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change_focus(m_buffer_pane);
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handle_command(command);
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}
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else
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{
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m_focused_buffer_pane->insert_code_point(keyval);
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}
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}
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}
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else
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{
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switch (keyval)
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{
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case '0':
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m_focused_buffer_pane->cursor_move(BufferPane::CursorMovement::SOL);
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break;
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case '$':
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m_focused_buffer_pane->cursor_move(BufferPane::CursorMovement::EOL);
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break;
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case ':':
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m_command_buffer_pane->clear();
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change_focus(m_command_buffer_pane);
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break;
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case 'A':
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m_focused_buffer_pane->enter_insert_mode(EnterInsertModeMode::END_OF_LINE);
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break;
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case 'G':
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m_focused_buffer_pane->cursor_move(BufferPane::CursorMovement::LAST_LINE);
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break;
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case 'I':
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m_focused_buffer_pane->enter_insert_mode(EnterInsertModeMode::START_OF_LINE);
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break;
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case 'O':
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m_focused_buffer_pane->enter_insert_mode(EnterInsertModeMode::NEW_LINE_BEFORE);
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break;
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case 'a':
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m_focused_buffer_pane->enter_insert_mode(EnterInsertModeMode::END_OF_CHAR);
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break;
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case 'g':
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m_focused_buffer_pane->cursor_move(BufferPane::CursorMovement::FIRST_LINE);
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break;
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case 'h':
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m_focused_buffer_pane->cursor_move(BufferPane::CursorMovement::LEFT);
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break;
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case 'i':
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m_focused_buffer_pane->enter_insert_mode(EnterInsertModeMode::START_OF_CHAR);
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break;
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case 'j':
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m_focused_buffer_pane->cursor_move(BufferPane::CursorMovement::DOWN);
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break;
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case 'k':
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m_focused_buffer_pane->cursor_move(BufferPane::CursorMovement::UP);
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break;
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case 'l':
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m_focused_buffer_pane->cursor_move(BufferPane::CursorMovement::RIGHT);
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break;
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case 'o':
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m_focused_buffer_pane->enter_insert_mode(EnterInsertModeMode::NEW_LINE_AFTER);
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break;
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case 'r':
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m_focused_buffer_pane->redo();
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break;
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case 'u':
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m_focused_buffer_pane->undo();
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break;
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case 'x':
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m_focused_buffer_pane->kill_character_at_cursor();
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break;
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case Keymod::CTRL + 'b':
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m_focused_buffer_pane->scroll_window_up(ScrollMode::WHOLE_SCREEN);
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break;
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case Keymod::CTRL + 'd':
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m_focused_buffer_pane->scroll_window_down(ScrollMode::HALF_SCREEN);
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break;
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case Keymod::CTRL + 'e':
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m_focused_buffer_pane->scroll_window_down(ScrollMode::ONE_LINE);
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break;
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case Keymod::CTRL + 'f':
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m_focused_buffer_pane->scroll_window_down(ScrollMode::WHOLE_SCREEN);
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break;
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case Keymod::CTRL + 'u':
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m_focused_buffer_pane->scroll_window_up(ScrollMode::HALF_SCREEN);
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break;
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case Keymod::CTRL + 'y':
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m_focused_buffer_pane->scroll_window_up(ScrollMode::ONE_LINE);
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break;
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}
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}
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break;
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}
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}
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void Window::resize()
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{
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SDL_GetWindowSize(m_window, &m_width, &m_height);
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glViewport(0, 0, m_width, m_height);
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m_gl->resize(m_width, m_height);
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int command_buffer_height = m_command_buffer_screen_rows * m_font->get_line_height();
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m_buffer_pane->move(0, command_buffer_height + 1);
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m_buffer_pane->resize(m_width, m_height - command_buffer_height - 1);
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m_command_buffer_pane->resize(m_width, command_buffer_height);
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m_command_buffer_pane->move(0, 0);
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}
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void Window::redraw()
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{
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static int last_command_buffer_screen_rows = 0;
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/* TODO: figure out number of command buffer screen rows. */
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m_command_buffer_screen_rows = 1;
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if (m_command_buffer_screen_rows != last_command_buffer_screen_rows)
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{
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resize();
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}
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last_command_buffer_screen_rows = m_command_buffer_screen_rows;
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glClear(GL_COLOR_BUFFER_BIT);
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m_buffer_pane->draw();
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m_gl->draw_rect(0, m_command_buffer_screen_rows * m_font->get_line_height(), m_width, 1, 0.5, 0.5, 0.5, 1.0);
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m_command_buffer_pane->draw();
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SDL_GL_SwapWindow(m_window);
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}
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uint32_t Window::get_keyval(SDL_Keycode keysym)
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{
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uint32_t keyval = keysym;
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if ((m_keymod & (KMOD_SHIFT | KMOD_CAPS)) != 0u)
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{
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uint32_t shifted = get_shifted(keyval);
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if (shifted != 0u)
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{
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keyval = shifted;
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}
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else
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{
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keyval |= Keymod::SHIFT;
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}
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}
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switch (keyval)
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{
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case SDLK_RETURN: keyval = '\n'; break;
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case SDLK_KP_DIVIDE: keyval = '/'; break;
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case SDLK_KP_MULTIPLY: keyval = '*'; break;
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case SDLK_KP_MINUS: keyval = '-'; break;
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case SDLK_KP_PLUS: keyval = '+'; break;
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case SDLK_KP_ENTER: keyval = '\n'; break;
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case SDLK_KP_1: keyval = '1'; break;
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case SDLK_KP_2: keyval = '2'; break;
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case SDLK_KP_3: keyval = '3'; break;
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case SDLK_KP_4: keyval = '4'; break;
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case SDLK_KP_5: keyval = '5'; break;
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case SDLK_KP_6: keyval = '6'; break;
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case SDLK_KP_7: keyval = '7'; break;
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case SDLK_KP_8: keyval = '8'; break;
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case SDLK_KP_9: keyval = '9'; break;
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case SDLK_KP_0: keyval = '0'; break;
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case SDLK_KP_PERIOD: keyval = '.'; break;
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case SDLK_KP_EQUALS: keyval = '='; break;
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case SDLK_KP_COMMA: keyval = ','; break;
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case SDLK_KP_LEFTPAREN: keyval = '('; break;
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case SDLK_KP_RIGHTPAREN: keyval = ')'; break;
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case SDLK_KP_LEFTBRACE: keyval = '{'; break;
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case SDLK_KP_RIGHTBRACE: keyval = '}'; break;
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case SDLK_KP_TAB: keyval = '\t'; break;
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case SDLK_KP_BACKSPACE: keyval = '\b'; break;
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case SDLK_KP_PERCENT: keyval = '%'; break;
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case SDLK_KP_LESS: keyval = '<'; break;
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case SDLK_KP_GREATER: keyval = '>'; break;
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case SDLK_KP_AMPERSAND: keyval = '&'; break;
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case SDLK_KP_VERTICALBAR: keyval = '|'; break;
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case SDLK_KP_COLON: keyval = ':'; break;
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case SDLK_KP_HASH: keyval = '#'; break;
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case SDLK_KP_SPACE: keyval = ' '; break;
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case SDLK_KP_AT: keyval = '@'; break;
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case SDLK_KP_EXCLAM: keyval = '!'; break;
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}
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if ((m_keymod & KMOD_CTRL) != 0u)
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{
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keyval |= Keymod::CTRL;
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}
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if ((m_keymod & KMOD_ALT) != 0u)
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{
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keyval |= Keymod::ALT;
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}
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if ((m_keymod & KMOD_GUI) != 0u)
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{
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keyval |= Keymod::GUI;
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}
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return keyval;
|
|
}
|
|
|
|
uint32_t Window::get_shifted(uint32_t keysym)
|
|
{
|
|
if ((keysym >= 'a') && (keysym <= 'z'))
|
|
{
|
|
return keysym - ('a' - 'A');
|
|
}
|
|
|
|
switch (keysym)
|
|
{
|
|
case SDLK_QUOTE: return '"';
|
|
case SDLK_COMMA: return '<';
|
|
case SDLK_MINUS: return '_';
|
|
case SDLK_PERIOD: return '>';
|
|
case SDLK_SLASH: return '?';
|
|
case SDLK_0: return ')';
|
|
case SDLK_1: return '!';
|
|
case SDLK_2: return '@';
|
|
case SDLK_3: return '#';
|
|
case SDLK_4: return '$';
|
|
case SDLK_5: return '%';
|
|
case SDLK_6: return '^';
|
|
case SDLK_7: return '&';
|
|
case SDLK_8: return '*';
|
|
case SDLK_9: return '(';
|
|
case SDLK_SEMICOLON: return ':';
|
|
case SDLK_EQUALS: return '+';
|
|
case SDLK_LEFTBRACKET: return '{';
|
|
case SDLK_BACKSLASH: return '|';
|
|
case SDLK_RIGHTBRACKET: return '}';
|
|
case SDLK_BACKQUOTE: return '~';
|
|
case SDLK_SPACE: return ' ';
|
|
case SDLK_BACKSPACE: return '\b';
|
|
}
|
|
|
|
return 0u;
|
|
}
|
|
|
|
void Window::change_focus(std::shared_ptr<BufferPane> buffer_pane)
|
|
{
|
|
m_focused_buffer_pane->set_focused(false);
|
|
m_focused_buffer_pane = buffer_pane;
|
|
m_focused_buffer_pane->set_focused(true);
|
|
request_redraw();
|
|
}
|
|
|
|
void Window::handle_command(const EncodedString & command)
|
|
{
|
|
CommandParser cp;
|
|
if (cp.parse(command))
|
|
{
|
|
if (cp.size() >= 1)
|
|
{
|
|
if (cp[0] == "w")
|
|
{
|
|
command_write_file(cp);
|
|
}
|
|
else if (cp[0] == "q")
|
|
{
|
|
command_quit(cp);
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/* TODO: handle command parsing failure */
|
|
}
|
|
}
|
|
|
|
void Window::command_write_file(const CommandParser & cp)
|
|
{
|
|
std::shared_ptr<Buffer> buffer = m_focused_buffer_pane->buffer();
|
|
if (buffer->filename())
|
|
{
|
|
buffer->write_to_file(buffer->filename()->c_str());
|
|
}
|
|
}
|
|
|
|
void Window::command_quit(const CommandParser & cp)
|
|
{
|
|
m_exit_requested = true;
|
|
}
|