readr

Minimal RSS reader (WIP)
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render.c (3089B)

      1 
      2 #include "termbox2.h"
      3 #include "tui.h"
      4 #include "config.h"
      5 #include "utils.h"
      6 
      7 #define HORIZ_LINE 0x2500
      8 #define VERT_LINE 0x2502
      9 
     10 static void
     11 draw_bars(void)
     12 {
     13 	int i;
     14 	const int width = tb_width();
     15 	const int height = tb_height();
     16 
     17 	// verticals first
     18 
     19 	for (i = 2; i < height - 2; i++) {
     20 		tb_set_cell(0, i, VERT_LINE, LINE_COLOR, BACK_COLOR);
     21 		tb_set_cell(FEED_CAP + 5, i, VERT_LINE, LINE_COLOR, BACK_COLOR); /* separator line */
     22 		tb_set_cell(width - 1, i, VERT_LINE, LINE_COLOR, BACK_COLOR);
     23 	}
     24 
     25 	for (i = 0; i < width; i++) {
     26 		tb_set_cell(i, 1, HORIZ_LINE, LINE_COLOR, BACK_COLOR);
     27 		tb_set_cell(i, height - 2, HORIZ_LINE, LINE_COLOR, BACK_COLOR);
     28 	}
     29 
     30 	tb_print(1, 0, LOGO_COLOR, BACK_COLOR, "readr");
     31 	tb_print(width - 5, 0, TEXT_COLOR, BACK_COLOR, VERSION);
     32 	tb_print(width - 66,
     33 		height - 1,
     34 		TEXT_COLOR,
     35 		BACK_COLOR,
     36 		"[arrows] move  [enter] open link  [space] open comments  [q] quit");
     37 
     38 	// corners top
     39 
     40 	tb_set_cell(0, 1, 0x250C, LINE_COLOR, BACK_COLOR);
     41 	tb_set_cell(FEED_CAP + 5, 1, 0x252C, LINE_COLOR, BACK_COLOR);
     42 	tb_set_cell(width - 1, 1, 0x2510, LINE_COLOR, BACK_COLOR);
     43 
     44 	// corners bottom
     45 
     46 	tb_set_cell(0, height - 2, 0x2514, LINE_COLOR, BACK_COLOR);
     47 	tb_set_cell(FEED_CAP + 5, height - 2, 0x2534, LINE_COLOR, BACK_COLOR);
     48 	tb_set_cell(width - 1, height - 2, 0x2518, LINE_COLOR, BACK_COLOR);
     49 }
     50 
     51 static void
     52 draw_background(void)
     53 {
     54 	tb_set_clear_attrs(TEXT_COLOR, BACK_COLOR);
     55 	tb_clear();
     56 }
     57 
     58 void
     59 render(app_t* app)
     60 {
     61 	int i;
     62 	uintattr_t color;
     63 	int title_len, domain_len;
     64 	char title[TITLE_CAP] = { 0 };
     65 	char domain[DOMAIN_CAP] = { 0 };
     66 	db_post_t* post;
     67 	feed_t* feed;
     68 	feed_t* selected_feed = app->feeds[app->selected_feed];
     69 	int buffer_height = tb_height() - 3 - 3;
     70 	int width = tb_width();
     71 
     72 	draw_background();
     73 	draw_bars();
     74 
     75 	for (i = 0; i < app->feeds_len; i++) {
     76 		feed = app->feeds[i];
     77 
     78 		if (app->selected_panel == 0 && i == app->selected_feed)
     79 			color = (FEED_COLOR | TB_REVERSE | TB_BRIGHT | TB_BOLD);
     80 		else if (i == app->selected_feed)
     81 			color = (FEED_COLOR | TB_BOLD);
     82 		else
     83 			color = (FEED_COLOR | TB_DIM);
     84 
     85 		tb_print(2, 3 + i, color, BACK_COLOR, feed->title ? feed->title : "N/A");
     86 	}
     87 
     88 	// posts
     89 
     90 	int visible_len = MIN(buffer_height, selected_feed->posts_len);
     91 
     92 	for (i = 0; i < visible_len; i++) {
     93 		post = selected_feed->posts[i];
     94 
     95 		title_len = MIN(TITLE_CAP, strlen(post->title)) + 1;
     96 		strncpy(title, post->title, title_len - 1);
     97 		title[title_len - 1] = ' '; // overlapping with domain
     98 		title[title_len] = '\0';
     99 
    100 		const char* domain_host = host_from_url(post->link);
    101 		domain_len = MIN(DOMAIN_CAP, strlen(domain_host));
    102 		strncpy(domain, domain_host, domain_len);
    103 		domain[domain_len] = '\0';
    104 
    105 		if (app->selected_panel == 1 && i == app->selected_post)
    106 			if (post->seen)
    107 				color = (POST_COLOR | TB_REVERSE | TB_DIM);
    108 			else
    109 				color = (POST_COLOR | TB_REVERSE | TB_BRIGHT | TB_BOLD);
    110 		else if (post->seen)
    111 			color = (SEEN_COLOR);
    112 		else
    113 			color = (POST_COLOR);
    114 
    115 		tb_print(width - domain_len - 2, 3 + i, DOMAIN_COLOR, BACK_COLOR, domain);
    116 		tb_print(FEED_CAP + 7, 3 + i, color, BACK_COLOR, title);
    117 	}
    118 
    119 	tb_present();
    120 }