JosephFerano/basicterm
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Get backspace working. Color escape codes sort of working but rendering is broken

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This commit is contained in:
Joseph Ferano 2023-11-16 17:22:10 +07:00
parent 2a9e327fdf
commit bfb4e2a994
1 changed files with 110 additions and 113 deletions
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223
bt.c
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@ -32,6 +32,7 @@ typedef struct {
float ypos; float ypos;
int capacity; int capacity;
int length; int length;
int cursor;
char *buf; char *buf;
} Scrollback; } Scrollback;
@ -112,13 +113,24 @@ int read_pty(FileDescriptors *fds, Scrollback *sb) {
printf("Reallocated scrollback buffer\n"); printf("Reallocated scrollback buffer\n");
} }
if (readbuf[nread - 1] == '\n') { if (readbuf[nread - 1] == '\n') {
printf("are you firing when you shouldnt?\n"); // printf("are you firing when you shouldnt?\n");
nread--; nread--;
} }
// if (nread > 2 && readbuf[0] == '^' && readbuf[1] == '[') {
// memcpy(sb->buf + sb->length, readbuf, nread);
// Don't do anything for not
// return nread;
// }
if (nread == 3 && readbuf[0] == '\b') {
memmove(sb->buf + sb->length - 1, sb->buf + sb->length, sb->length);
sb->length--;
return nread;
}
for (int i = 0; i < nread; i++) { for (int i = 0; i < nread; i++) {
if (readbuf[i] == '\r') { if (readbuf[i] == '\r') {
readbuf[i] = '\n'; readbuf[i] = '\n';
} }
// printf("%ld %d\n", nread, readbuf[i]);
} }
memcpy(sb->buf + sb->length, readbuf, nread); memcpy(sb->buf + sb->length, readbuf, nread);
sb->length += nread; sb->length += nread;
@ -127,43 +139,59 @@ int read_pty(FileDescriptors *fds, Scrollback *sb) {
} }
} }
void draw_line(char *buf, int x, int y, SDL_Color color, Context* ctx) {
SDL_Surface* surface =
TTF_RenderText_Blended(ctx->font, buf, color);
if (surface == NULL) {
fprintf(stderr, "DONT PRINT THERES AN ERROR");
return;
}
// now you can convert it into a texture
SDL_Texture* texture = SDL_CreateTextureFromSurface(ctx->renderer, surface);
SDL_Rect rect;
rect.x = x;
rect.y = y;
rect.w = surface->w;
rect.h = surface->h;
// last_xpos = surface->w;
SDL_RenderCopy(ctx->renderer, texture, NULL, &rect);
SDL_DestroyTexture(texture);
SDL_FreeSurface(surface);
}
// Not being used right now
// This function is to handle a prompt in case that's something we have to do at some point
void handle_prompt(Context* ctx, int last_xpos, int nrow) {
if (ctx->rline_len > 0) {
draw_line(ctx->readline, last_xpos, nrow * 20, WHITE, ctx);
}
}
void render_scrollback(Context* ctx) { void render_scrollback(Context* ctx) {
SDL_RenderClear(ctx->renderer); SDL_RenderClear(ctx->renderer);
// SDL_Color current_color = WHITE; SDL_Color current_color = WHITE;
int col_max = 120; int col_max = 120;
char row_buf[col_max]; char row_buf[col_max];
int nrow = 0; int nrow = 0;
int ncol = 0; int ncol = 0;
int last_xpos = 0; // int last_xpos = 0;
Scrollback sb = *ctx->sb; Scrollback sb = *ctx->sb;
for (int c = 0; c < sb.length; c++) { for (int c = 0; c < sb.length; c++) {
if ((sb.buf[c] == '\n' && ncol > 0) || c == sb.length - 1) { if ((sb.buf[c] == '\n' && ncol > 0) || c == sb.length - 1) {
row_buf[ncol] = '\0'; if (c == sb.length - 1) {
SDL_Surface* surface = row_buf[ncol++] = sb.buf[c];
TTF_RenderText_Blended(ctx->font, row_buf, WHITE);
if (surface == NULL) {
fprintf(stderr, "DONT PRINT THERES AN ERROR");
return;
} }
row_buf[ncol] = '\0';
// now you can convert it into a texture draw_line(row_buf, 0, nrow * 20, current_color, ctx);
SDL_Texture* texture = SDL_CreateTextureFromSurface(ctx->renderer, surface); // last_xpos = surface->w;
SDL_Rect rect;
rect.x = 0;
rect.y = nrow * 20;
rect.w = surface->w;
rect.h = surface->h;
last_xpos = surface->w;
SDL_RenderCopy(ctx->renderer, texture, NULL, &rect);
SDL_DestroyTexture(texture);
SDL_FreeSurface(surface);
if (c < sb.length - 1) { if (c < sb.length - 1) {
nrow++; nrow++;
@ -174,56 +202,49 @@ void render_scrollback(Context* ctx) {
} else if (sb.buf[c] == '\x1b') { } else if (sb.buf[c] == '\x1b') {
int c2 = c + 1; int c2 = c + 1;
// Control Sequence Introducer // Control Sequence Introducer
// int csi_args[16]; int csi_args[16];
// char csi_code; char csi_code;
// int nargs = 0; int nargs = 0;
if (sb.buf[c2] == '[') { if (sb.buf[c2] == '[') {
// char *esc_buf = sb.buf + c2 + 1; char *esc_buf = sb.buf + c2 + 1;
while (true) { while (true) {
// char *substr; char *substr;
// // long num = strtol(esc_buf, &substr, 10); long num = strtol(esc_buf, &substr, 10);
// if (esc_buf != substr) { if (esc_buf != substr) {
// // csi_args[nargs++] = num; csi_args[nargs++] = num;
// esc_buf = substr; esc_buf = substr;
// if (substr[0] == ';') { if (substr[0] == ';') {
// esc_buf++; esc_buf++;
// } }
// continue; continue;
// } }
// csi_code = substr[0]; csi_code = substr[0];
// SDL_Color new_color = WHITE; SDL_Color new_color = current_color;
// switch (csi_code) { switch (csi_code) {
// case 'm': case 'm':
// for (int i = 0; i < nargs; i++) { for (int i = 0; i < nargs; i++) {
// if (csi_args[i] == 31) { if (csi_args[i] == 31) {
// new_color = RED; new_color = RED;
// } else if (csi_args[i] == 32) { } else if (csi_args[i] == 32) {
// new_color = GREEN; new_color = GREEN;
// } else if (csi_args[i] == 33) { } else if (csi_args[i] == 33) {
// new_color = YELLOW; new_color = YELLOW;
// } else if (csi_args[i] == 34) { } else if (csi_args[i] == 34) {
// new_color = BLUE; new_color = BLUE;
// } else if (csi_args[i] == 35) { } else if (csi_args[i] == 35) {
// new_color = MAGENTA; new_color = MAGENTA;
// } else if (csi_args[i] == 36) { } else if (csi_args[i] == 36) {
// new_color = SKYBLUE; new_color = SKYBLUE;
// } else if (csi_args[i] == 0) { } else if (csi_args[i] == 0) {
// new_color = RAYWHITE; // new_color = RAYWHITE;
// } // new_color = WHITE;
// } }
// row_buf[ncol] = '\0'; // printf("%d %d\n", i, csi_args[i]);
// // TODO: This looks like the actual place where we }
// // draw the text at a line c += (substr) - (sb.buf + c);
// // Vector2 pos = { row_posx, nrow * row_height + sb.ypos }; current_color = new_color;
// // DrawTextEx(*fontDefault, row_buf, pos, fontsize, 0, current_color); break;
// // current_color = new_color; }
// ncol = 0;
// c += (substr) - (sb.buf + c);
// // TODO: Get the text height
// // int width = MeasureTextEx(*fontDefault, row_buf, fontsize, 1).x;
// // row_posx += width + 0.85;
// break;
// }
break; break;
} }
} }
@ -233,33 +254,6 @@ void render_scrollback(Context* ctx) {
} }
// We drew the scrollback buffer, now draw the user's prompt // We drew the scrollback buffer, now draw the user's prompt
if (ctx->rline_len > 0) {
SDL_Surface* surface =
TTF_RenderText_Blended(ctx->font, ctx->readline, WHITE);
if (surface == NULL) {
fprintf(stderr, "DONT PRINT THERES AN ERROR");
return;
}
// now you can convert it into a texture
SDL_Texture* texture = SDL_CreateTextureFromSurface(ctx->renderer, surface);
SDL_Rect rect;
rect.x = last_xpos + 10;
rect.y = nrow * 20;
rect.w = surface->w;
rect.h = surface->h;
SDL_RenderCopy(ctx->renderer, texture, NULL, &rect);
SDL_DestroyTexture(texture);
SDL_FreeSurface(surface);
}
SDL_RenderPresent(ctx->renderer); SDL_RenderPresent(ctx->renderer);
} }
@ -343,23 +337,26 @@ int main(void) {
printf("%s\n", sb.buf); printf("%s\n", sb.buf);
printf("============\n"); printf("============\n");
} else if ((key >= 32) && (key <= 125)) { } else if ((key >= 32) && (key <= 125)) {
ctx.readline[ctx.rline_len] = (char)key; // ctx.readline[ctx.rline_len] = (char)key;
ctx.rline_len++; // ctx.rline_len++;
ctx.readline[ctx.rline_len] = '\0'; // ctx.readline[ctx.rline_len] = '\0';
// printf("%d\n", key);
write(fds.parent, &key, 1);
} }
if (key == SDLK_RETURN) { if (key == SDLK_RETURN) {
ctx.readline[ctx.rline_len] = '\r'; char k = '\r';
ctx.rline_len++; write(fds.parent, &k, 1);
write(fds.parent, ctx.readline, ctx.rline_len);
ctx.rline_len = 0;
new_char = true; new_char = true;
} }
if (key == SDLK_BACKSPACE) { if (key == SDLK_BACKSPACE) {
if (ctx.rline_len > 0) { // if (ctx.rline_len > 0) {
ctx.rline_len--; // ctx.rline_len--;
ctx.readline[ctx.rline_len] = '\0'; // ctx.readline[ctx.rline_len] = '\0';
} // }
char k = '\177';
write(fds.parent, &k, 1);
new_char = true; new_char = true;
} }