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#include <string.h>
#include "runes.h"
void runes_display_init(RunesTerm *t)
{
cairo_font_face_t *font_face;
cairo_matrix_t font_matrix, ctm;
t->bgcolor = cairo_pattern_create_rgb(1.0, 1.0, 1.0);
t->fgcolor = cairo_pattern_create_rgb(0.0, 0.0, 1.0);
t->cursorcolor = cairo_pattern_create_rgb(0.0, 1.0, 0.0);
font_face = cairo_toy_font_face_create("monospace", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
cairo_matrix_init_scale(&font_matrix, 14.0, 14.0);
cairo_get_matrix(t->cr, &ctm);
t->font = cairo_scaled_font_create(font_face, &font_matrix, &ctm, cairo_font_options_create());
cairo_set_scaled_font(t->cr, t->font);
cairo_set_source(t->cr, t->bgcolor);
cairo_paint(t->cr);
cairo_set_source(t->cr, t->fgcolor);
runes_display_move_to(t, 0, 0);
runes_pty_backend_set_window_size(t);
}
static void runes_display_get_font_dimensions(RunesTerm *t, double *fontx, double *fonty, double *ascent)
{
cairo_font_extents_t extents;
cairo_font_extents(t->cr, &extents);
*fontx = extents.max_x_advance;
*fonty = extents.height;
*ascent = extents.ascent;
}
void runes_display_get_term_size(RunesTerm *t, int *row, int *col, int *xpixel, int *ypixel)
{
double fontx, fonty, ascent;
runes_window_backend_get_size(t, xpixel, ypixel);
runes_display_get_font_dimensions(t, &fontx, &fonty, &ascent);
*row = (int)(*ypixel / fonty);
*col = (int)(*xpixel / fontx);
}
void runes_display_get_position(RunesTerm *t, int *row, int *col)
{
*row = t->row;
*col = t->col;
}
/* note: this uses the backend cairo context because it should be redrawn every
* time, and shouldn't be left behind when it moves */
void runes_display_draw_cursor(RunesTerm *t)
{
double x, y;
double fontx, fonty, ascent;
cairo_save(t->backend_cr);
cairo_set_source(t->backend_cr, t->cursorcolor);
runes_display_move_to(t, t->row, t->col);
cairo_get_current_point(t->cr, &x, &y);
runes_display_get_font_dimensions(t, &fontx, &fonty, &ascent);
cairo_rectangle(t->backend_cr, x, y - ascent, fontx, fonty);
cairo_fill(t->backend_cr);
cairo_restore(t->backend_cr);
}
void runes_display_move_to(RunesTerm *t, int row, int col)
{
double fontx, fonty, ascent;
t->row = row;
t->col = col;
runes_display_get_font_dimensions(t, &fontx, &fonty, &ascent);
cairo_move_to(t->cr, col * fontx, row * fonty + ascent);
}
void runes_display_show_string(RunesTerm *t, char *buf, size_t len)
{
if (len) {
buf[len] = '\0';
cairo_show_text(t->cr, buf);
t->col += strlen(buf);
/* we have to flush manually because XNextEvent (which normally handles
* flushing) will most likely be called again before the keystroke is
* handled */
runes_window_backend_flush(t);
}
}
void runes_display_backspace(RunesTerm *t)
{
double x, y;
double fontx, fonty, ascent;
runes_display_move_to(t, t->row, t->col - 1);
cairo_save(t->cr);
cairo_set_source(t->cr, t->bgcolor);
cairo_get_current_point(t->cr, &x, &y);
runes_display_get_font_dimensions(t, &fontx, &fonty, &ascent);
cairo_rectangle(t->cr, x, y - ascent, fontx, fonty);
cairo_fill(t->cr);
runes_window_backend_flush(t);
cairo_restore(t->cr);
runes_display_move_to(t, t->row, t->col);
}
void runes_display_kill_line_forward(RunesTerm *t)
{
double x, y;
double fontx, fonty, ascent;
int row, col, xpixel, ypixel;
cairo_save(t->cr);
cairo_set_source(t->cr, t->bgcolor);
cairo_get_current_point(t->cr, &x, &y);
runes_display_get_font_dimensions(t, &fontx, &fonty, &ascent);
runes_display_get_term_size(t, &row, &col, &xpixel, &ypixel);
cairo_rectangle(t->cr, x, y - ascent, xpixel - x, fonty);
cairo_fill(t->cr);
runes_window_backend_flush(t);
cairo_restore(t->cr);
runes_display_move_to(t, t->row, t->col);
}
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