ttextedit_wip.h - ltkx - GUI toolkit for X11 (WIP)
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ttextedit_wip.h (3097B)
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1 /*
2 * This file is part of the Lumidify ToolKit (LTK)
3 * Copyright (c) 2020 lumidify <nobody@lumidify.org>
4 *
5 * Permission is hereby granted, free of charge, to any person obtaining a copy
6 * of this software and associated documentation files (the "Software"), to deal
7 * in the Software without restriction, including without limitation the rights
8 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9 * copies of the Software, and to permit persons to whom the Software is
10 * furnished to do so, subject to the following conditions:
11 *
12 * The above copyright notice and this permission notice shall be included in all
13 * copies or substantial portions of the Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 * SOFTWARE.
22 */
23
24 #ifndef _TEXT_HB_H_
25 #define _TEXT_HB_H_
26
27 /*
28 Requires the following includes:
29 <X11/Xlib.h>, <X11/Xutil.h>, "stb_truetype.h",
30 "khash.h", <harfbuzz/hb.h>, <fribidi.h>,
31 <fontconfig/fontconfig.h>
32 */
33
34 #include "gap_buffer.h"
35 #include "array.h"
36 #include "stack.h"
37
38 /* Note: hb_script_t and FriBidiLevel are really just uint32_t's, but
39 I'm not sure if I should rely on that, so they're separate here */
40 LTK_GAP_BUFFER_INIT_DECL(uint32, uint32_t)
41 LTK_GAP_BUFFER_INIT_DECL(script, hb_script_t)
42 LTK_GAP_BUFFER_INIT_DECL(int, int)
43 LTK_ARRAY_INIT_DECL(level, FriBidiLevel)
44 LTK_ARRAY_INIT_DECL(int, int)
45 LTK_STACK_INIT_DECL(script, int, hb_script_t, pair_index, script);
46
47 struct ltk_text_run {
48 LtkGlyph *glyphs;
49 unsigned int num_glyphs;
50 struct ltk_text_run *next;
51 struct ltk_text_run *last;
52 size_t start_index;
53 size_t len;
54 int start_x;
55 int start_y;
56 int w;
57 LtkFont *font;
58 uint16_t font_id;
59 hb_script_t script;
60 hb_direction_t dir;
61 }
62
63 struct ltk_text_line {
64 struct ltk_gap_buffer_uint32 *log_buf; /* buffer of the logical text */
65 struct ltk_gap_buffer_script *scripts;
66 struct ltk_gap_buffer_uint32 *vis_buf; /* buffer of visual text */
67 struct ltk_gap_buffer_int *log2vis;
68 struct ltk_gap_buffer_int *vis2log;
69 struct ltk_array_level *bidi_levels;
70 struct ltk_text_run *first_run; /* first node in the linked list of runs */
71 struct ltk_text_run *last_run; /* last node in the linked list of runs */
72 struct ltk_text_run *cur_run; /* current node in the linked list of runs */
73 struct ltk_text_line *next; /* next text line in the buffer */
74 unsigned int height; /* height of the line (including wrapping) */
75 FribidiCharType dir; /* overall paragraph direction */
76 struct ltk_array_int *wrap_indeces;
77 size_t len;
78 uint16_t font_size;
79 int y_max;
80 int y_min;
81 int w;
82 int h;
83 XImage *img;
84 };
85
86 struct ltk_text_buffer {
87 struct ltk_text_line *head;
88 struct ltk_text_line *cur_line;
89 unsigned int line_gap;
90 };