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#include <raylib.h>
#include "log.h"
#include "editor.h"
#include "mem.h"
#include <string.h>
#define MIN(a, b) ((a) < (b))? (a) : (b)
struct redr_ctx {
/* window */
float width;
float height;
const char *title;
/* font */
float font_size;
float font_spacing;
};
static void CustomLogCallback(int logLevel, const char *text, va_list args) {
enum log_level red_level = RED_LOG_ALL;
switch (logLevel) {
case LOG_ALL:
red_level = RED_LOG_ALL;
break;
case LOG_TRACE:
case LOG_DEBUG:
red_level = RED_LOG_DEBUG;
break;
case LOG_INFO:
red_level = RED_LOG_INFO;
break;
case LOG_WARNING:
red_level = RED_LOG_WARNING;
break;
case LOG_ERROR:
case LOG_FATAL:
red_level = RED_LOG_ERROR;
break;
case LOG_NONE:
red_level = RED_LOG_NONE;
break;
}
log_printf(red_level, text, args);
log_printf(red_level, "\n");
}
static inline void draw_text_slice(int x, int y, int size, Color c,
const struct slice sl) {
char line[4096];
size_t len;
if ((len = sl.len) > sizeof (line) - 1)
len = sizeof(line) - 1;
memcpy(line, sl.ptr, len);
line[len] = '\0';
DrawText(line, x, y, size, c);
}
void redr_init(struct redr_ctx **ctxp, float width, float height,
float font_size, float font_spacing, const char *title) {
SetTraceLogCallback(CustomLogCallback);
struct redr_ctx *ctx = mem_malloc(sizeof(struct redr_ctx));
ctx->height = height;
ctx->width = width;
ctx->title = title;
ctx->font_size = font_size;
ctx->font_spacing = font_spacing;
*ctxp = ctx;
InitWindow(width, height, title);
SetWindowState(FLAG_WINDOW_RESIZABLE);
EnableEventWaiting();
}
bool redr_should_close(struct redr_ctx *ctx) {
return WindowShouldClose();
}
void redr_resize(struct redr_ctx *ctx) {
if (IsWindowResized()) {
ctx->width = GetScreenWidth();
ctx->height = GetScreenHeight();
}
}
void redr_draw(struct redr_ctx *ctx, const struct ed_buf *eb) {
float font_size = ctx->font_size;
float spacing = ctx->font_spacing;
float font_height = MeasureTextEx(GetFontDefault(), "a", font_size, spacing).y;
BeginDrawing();
ClearBackground(RAYWHITE);
const size_t linenum_to_draw = MIN(eb_get_line_num(eb), ctx->height / font_height);
#ifdef CONFIG_DEBUG
log_printf(RED_LOG_DEBUG,
"[draw]: %lu lines ------\n", linenum_to_draw);
log_printf(RED_LOG_DEBUG,
"[draw]: cursor: (%lu, %lu) ------\n",
eb_get_cur_col(eb), eb_get_cur_row(eb));
#endif
for (size_t i = 0; i <= linenum_to_draw; i++) {
struct slice sl = {};
eb_get_line_slice(eb, i, &sl);
#ifdef CONFIG_DEBUG
log_printf(RED_LOG_DEBUG,
"[draw]: line %lu, ptr=%p, len=%lu\n",
i, sl.ptr, sl.len);
#endif
if (i != eb_get_cur_row(eb)) {
draw_text_slice(10, 10 + font_size * i,
font_size, BLACK, sl);
} else { /* draw cursor */
#define BUFSIZE 4096
char buf[BUFSIZE];
size_t cur_col = eb_get_cur_col(eb);
strncpy(buf, sl.ptr == NULL? "" : sl.ptr, MIN(sl.len, BUFSIZE));
if (sl.len < 4096)
buf[sl.len] = '\0';
if (buf[cur_col] == '\0')
buf[cur_col + 1] = '\0';
buf[cur_col] = '_';
DrawText(buf, 10, 10 + font_size * i,
font_size, BLACK);
}
}
EndDrawing();
}
void redr_free(struct redr_ctx *ctx) {
CloseWindow();
mem_free(ctx);
}
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