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#include "window.h"
#include <SDL2/SDL.h>
#include "buffer.h"
#include "editor.h"
#include "error.h"
#include "font.h"
#include "input.h"
static SDL_Window *window = NULL;
static SDL_Renderer *renderer = NULL;
static SDL_Texture *font_texture = NULL;
static PSFFont font;
void window_init(const char *title, int rows, int cols)
{
if (SDL_Init(SDL_INIT_VIDEO) != 0)
fatal_error("Failed to init SDL: %s\n", SDL_GetError());
font = font_load("terminus/ter-u24n.psf");
int window_width = cols * font.width;
int window_height = rows * font.height;
window = SDL_CreateWindow(title, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, window_width, window_height, 0);
if (window == NULL)
fatal_error("Failed to create window: %s\n", SDL_GetError());
renderer = SDL_CreateRenderer(window, -1, 0);
if (renderer == NULL)
fatal_error("Failed to create renderer: %s\n", SDL_GetError());
font_texture = font_create_texture(renderer, &font);
SDL_ShowWindow(window);
}
int window_handle_event(struct editor_state *editor)
{
static SDL_Event e;
SDL_WaitEvent(&e);
switch (e.type) {
case SDL_QUIT:
return 0;
case SDL_KEYDOWN:
editor_process_keypress(editor, &e.key.keysym);
break;
case SDL_TEXTINPUT:
if (editor->mode == EDITOR_MODE_NORMAL)
break;
editor_insert_char(editor, *e.text.text);
break;
}
return 1;
}
static void draw_font_text(struct append_buffer *buffer)
{
SDL_Rect dstrect = { 0, 0, 0, 0 };
SDL_Rect srcrect = { 0, 0, 0, 0 };
for (int i = 0; i < buffer->length; i++) {
const char letter = buffer->buffer[i];
if (letter == ' ') {
dstrect.x += font.width;
continue;
}
if (letter == '\n') {
dstrect.x = 0;
dstrect.y += font.height;
continue;
}
int glyph_index = letter;
if (font.unicode_desc != NULL) {
glyph_index = font.unicode_desc[glyph_index];
}
dstrect.w = font.width;
dstrect.h = font.height;
srcrect.x = glyph_index * font.width;
srcrect.y = 0;
srcrect.w = font.width;
srcrect.h = font.height;
SDL_RenderCopy(renderer, font_texture, &srcrect, &dstrect);
dstrect.x += font.width;
}
}
void window_redraw(struct editor_state *editor)
{
SDL_RenderClear(renderer);
editor_scroll(editor);
struct append_buffer buffer = ABUF_INIT;
editor_draw_rows(editor, &buffer);
editor_draw_status_bar(editor, &buffer);
editor_draw_message_bar(editor, &buffer);
draw_font_text(&buffer);
SDL_Rect cursor_rect;
cursor_rect.x = editor->cursor_display_x * font.width;
cursor_rect.y = (editor->cursor_y - editor->row_offset) * font.height;
cursor_rect.w = font.width;
cursor_rect.h = font.height;
SDL_SetRenderDrawColor(renderer, 0x7f, 0x7f, 0x7f, 0xff);
SDL_RenderFillRect(renderer, &cursor_rect);
SDL_SetRenderDrawColor(renderer, 0x00, 0x00, 0x00, 0xff);
SDL_RenderPresent(renderer);
SDL_UpdateWindowSurface(window);
}
void window_get_size(int *rows, int *cols)
{
int w, h;
SDL_GetWindowSize(window, &w, &h);
*cols = w / font.width;
*rows = h / font.height;
}
void window_destroy()
{
font_destroy(&font);
SDL_DestroyTexture(font_texture);
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
}
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