text_buffer.h (3766B)
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_BUFFER_H_ 25 #define _TEXT_BUFFER_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>, "text_common.h" 32 */ 33 34 /* Note: hb_script_t and FriBidiLevel are really just uint32_t's, but 35 I'm not sure if I should rely on that, so they're separate here */ 36 LTK_ARRAY_INIT_DECL(uint32, uint32_t) 37 LTK_ARRAY_INIT_DECL(script, hb_script_t) 38 LTK_ARRAY_INIT_DECL(level, FriBidiLevel) 39 LTK_ARRAY_INIT_DECL(int, int) 40 41 struct ltk_text_run { 42 LtkGlyph *glyphs; 43 unsigned int num_glyphs; 44 struct ltk_text_run *next; 45 struct ltk_text_run *last; 46 size_t start_index; 47 size_t len; 48 int start_x; 49 int start_y; 50 int w; 51 LtkFont *font; 52 uint16_t font_id; 53 uint16_t font_size; 54 hb_script_t script; 55 hb_direction_t dir; 56 }; 57 58 struct ltk_soft_line { 59 size_t glyph_index; 60 size_t len; 61 int w; 62 struct ltk_text_run *run; 63 struct ltk_array_int *glyph_pos; 64 struct ltk_array_uint32 *glyph_clusters; 65 }; 66 67 LTK_ARRAY_INIT_DECL(line, struct ltk_soft_line *) 68 69 struct ltk_text_line { 70 struct ltk_array_uint32 *log_buf; /* buffer of the logical text */ 71 struct ltk_array_script *scripts; 72 struct ltk_array_uint32 *vis_buf; /* buffer of visual text */ 73 struct ltk_array_int *log2vis; 74 struct ltk_array_int *vis2log; 75 struct ltk_array_level *bidi_levels; 76 struct ltk_array_line *soft_lines; 77 struct ltk_text_run *first_run; /* first node in the linked list of runs */ 78 struct ltk_text_run *last_run; /* last node in the linked list of runs */ 79 struct ltk_text_line *next; /* next text line in the buffer */ 80 hb_direction_t dir; /* overall paragraph direction */ 81 size_t len; 82 uint16_t font_size; 83 int w; 84 int h; 85 int w_wrapped; 86 int h_wrapped; 87 }; 88 89 struct ltk_text_line_list { 90 struct ltk_text_line *tl; 91 XImage *img; 92 struct ltk_text_line_list *next; 93 struct ltk_text_line_list *last; 94 }; 95 96 struct ltk_text_buffer { 97 struct ltk_text_line_list *head; 98 size_t cursor_pos; 99 }; 100 101 void ltk_soft_line_destroy(struct ltk_soft_line *sl); 102 XImage *ltk_text_line_render(struct ltk_text_line *tl, 103 Display *dpy, Window window, GC gc, Colormap colormap, XColor fg, XColor bg); 104 uint32_t ltk_soft_line_get_index_from_pos(int x, struct ltk_text_line *tl, struct ltk_soft_line *sl, int *found_pos); 105 void ltk_text_line_insert_utf32(struct ltk_text_line *tl, size_t index, uint32_t *text, size_t len); 106 void ltk_text_line_insert_utf8(struct ltk_text_line *tl, size_t index, char *text); 107 struct ltk_text_line *ltk_text_line_create(uint16_t font_size); 108 void ltk_text_line_destroy(struct ltk_text_line *tl); 109 110 #endif /* _TEXT_BUFFER_H_ */