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|---|---|---|---|
| 1 | #include <stdbool.h> | ||
| 2 | #include <stdlib.h> | ||
| 3 | #include <string.h> | ||
| 4 | #include "wrap.h" | ||
| 5 | #include "buffer.h" | ||
| 6 | #include "indent.h" | ||
| 7 | #include "selection.h" | ||
| 8 | #include "util/string-view.h" | ||
| 9 | #include "util/string.h" | ||
| 10 | #include "util/unicode.h" | ||
| 11 | #include "util/utf8.h" | ||
| 12 | |||
| 13 | typedef struct { | ||
| 14 | String buf; | ||
| 15 | char *indent; | ||
| 16 | size_t indent_len; | ||
| 17 | size_t indent_width; | ||
| 18 | size_t cur_width; | ||
| 19 | size_t text_width; | ||
| 20 | } ParagraphFormatter; | ||
| 21 | |||
| 22 | 60 | static void add_word(ParagraphFormatter *pf, const char *word, size_t len) | |
| 23 | { | ||
| 24 | 60 | size_t i = 0; | |
| 25 | 60 | size_t word_width = 0; | |
| 26 |
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240 | while (i < len) { |
| 27 | 180 | word_width += u_char_width(u_get_char(word, len, &i)); | |
| 28 | } | ||
| 29 | |||
| 30 |
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60 | if (pf->cur_width && pf->cur_width + 1 + word_width > pf->text_width) { |
| 31 | 6 | string_append_byte(&pf->buf, '\n'); | |
| 32 | 6 | pf->cur_width = 0; | |
| 33 | } | ||
| 34 | |||
| 35 |
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60 | if (pf->cur_width == 0) { |
| 36 |
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8 | if (pf->indent_len) { |
| 37 | ✗ | string_append_buf(&pf->buf, pf->indent, pf->indent_len); | |
| 38 | } | ||
| 39 | 8 | pf->cur_width = pf->indent_width; | |
| 40 | } else { | ||
| 41 | 52 | string_append_byte(&pf->buf, ' '); | |
| 42 | 52 | pf->cur_width++; | |
| 43 | } | ||
| 44 | |||
| 45 | 60 | string_append_buf(&pf->buf, word, len); | |
| 46 | 60 | pf->cur_width += word_width; | |
| 47 | 60 | } | |
| 48 | |||
| 49 | 2 | static bool is_long_comment_delim(const StringView *sv) | |
| 50 | { | ||
| 51 | // TODO: make this configurable | ||
| 52 |
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2 | return strview_equal_cstring(sv, "/*") || strview_equal_cstring(sv, "*/"); |
| 53 | } | ||
| 54 | |||
| 55 | 5 | static bool is_paragraph_separator(const StringView *line) | |
| 56 | { | ||
| 57 | 5 | StringView trimmed = *line; | |
| 58 | 5 | strview_trim(&trimmed); | |
| 59 |
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5 | return (trimmed.length == 0) || is_long_comment_delim(&trimmed); |
| 60 | } | ||
| 61 | |||
| 62 | 3 | static bool in_paragraph ( | |
| 63 | const StringView *line, | ||
| 64 | size_t para_indent_width, | ||
| 65 | unsigned int tab_width | ||
| 66 | ) { | ||
| 67 | 3 | size_t w = get_indent_width(line, tab_width); | |
| 68 |
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3 | return (w == para_indent_width) && !is_paragraph_separator(line); |
| 69 | } | ||
| 70 | |||
| 71 | 2 | static size_t paragraph_size(View *view) | |
| 72 | { | ||
| 73 | 2 | BlockIter bi = view->cursor; | |
| 74 | 2 | block_iter_bol(&bi); | |
| 75 | 2 | StringView line = block_iter_get_line(&bi); | |
| 76 |
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2 | if (is_paragraph_separator(&line)) { |
| 77 | // Not in paragraph | ||
| 78 | return 0; | ||
| 79 | } | ||
| 80 | |||
| 81 | 2 | unsigned int tab_width = view->buffer->options.tab_width; | |
| 82 | 2 | size_t para_indent_width = get_indent_width(&line, tab_width); | |
| 83 | |||
| 84 | // Go to beginning of paragraph | ||
| 85 |
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2 | while (block_iter_prev_line(&bi)) { |
| 86 | 1 | line = block_iter_get_line(&bi); | |
| 87 |
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1 | if (!in_paragraph(&line, para_indent_width, tab_width)) { |
| 88 | 1 | block_iter_eat_line(&bi); | |
| 89 | 1 | break; | |
| 90 | } | ||
| 91 | } | ||
| 92 | 2 | view->cursor = bi; | |
| 93 | |||
| 94 | // Get size of paragraph | ||
| 95 | 2 | size_t size = 0; | |
| 96 | 2 | do { | |
| 97 | 2 | size_t bytes = block_iter_eat_line(&bi); | |
| 98 |
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2 | if (!bytes) { |
| 99 | break; | ||
| 100 | } | ||
| 101 | 2 | size += bytes; | |
| 102 | 2 | line = block_iter_get_line(&bi); | |
| 103 |
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2 | } while (in_paragraph(&line, para_indent_width, tab_width)); |
| 104 | return size; | ||
| 105 | } | ||
| 106 | |||
| 107 | 2 | void wrap_paragraph(View *view, size_t text_width) | |
| 108 | { | ||
| 109 | 2 | size_t len; | |
| 110 |
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2 | if (view->selection) { |
| 111 | ✗ | view->selection = SELECT_LINES; | |
| 112 | ✗ | len = prepare_selection(view); | |
| 113 | } else { | ||
| 114 | 2 | len = paragraph_size(view); | |
| 115 | } | ||
| 116 |
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2 | if (!len) { |
| 117 | ✗ | return; | |
| 118 | } | ||
| 119 | |||
| 120 | 2 | const LocalOptions *options = &view->buffer->options; | |
| 121 | 2 | char *sel = block_iter_get_bytes(&view->cursor, len); | |
| 122 | 2 | StringView sv = string_view(sel, len); | |
| 123 | 2 | size_t indent_width = get_indent_width(&sv, options->tab_width); | |
| 124 | 2 | char *indent = make_indent(options, indent_width); | |
| 125 | |||
| 126 | 4 | ParagraphFormatter pf = { | |
| 127 | .buf = STRING_INIT, | ||
| 128 | .indent = indent, | ||
| 129 |
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2 | .indent_len = indent ? strlen(indent) : 0, |
| 130 | .indent_width = indent_width, | ||
| 131 | .cur_width = 0, | ||
| 132 | .text_width = text_width | ||
| 133 | }; | ||
| 134 | |||
| 135 | 62 | for (size_t i = 0; true; ) { | |
| 136 |
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124 | while (i < len) { |
| 137 | 122 | size_t tmp = i; | |
| 138 |
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122 | if (!u_is_breakable_whitespace(u_get_char(sel, len, &tmp))) { |
| 139 | break; | ||
| 140 | } | ||
| 141 | 62 | i = tmp; | |
| 142 | } | ||
| 143 |
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62 | if (i == len) { |
| 144 | break; | ||
| 145 | } | ||
| 146 | |||
| 147 | size_t start = i; | ||
| 148 |
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240 | while (i < len) { |
| 149 | 240 | size_t tmp = i; | |
| 150 |
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240 | if (u_is_breakable_whitespace(u_get_char(sel, len, &tmp))) { |
| 151 | break; | ||
| 152 | } | ||
| 153 | 180 | i = tmp; | |
| 154 | } | ||
| 155 | |||
| 156 | 60 | add_word(&pf, sel + start, i - start); | |
| 157 | } | ||
| 158 | |||
| 159 |
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2 | if (pf.buf.len) { |
| 160 | 2 | string_append_byte(&pf.buf, '\n'); | |
| 161 | } | ||
| 162 | 2 | buffer_replace_bytes(view, len, pf.buf.buffer, pf.buf.len); | |
| 163 |
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2 | if (pf.buf.len) { |
| 164 | 2 | block_iter_skip_bytes(&view->cursor, pf.buf.len - 1); | |
| 165 | } | ||
| 166 | |||
| 167 | 2 | string_free(&pf.buf); | |
| 168 | 2 | free(pf.indent); | |
| 169 | 2 | free(sel); | |
| 170 | 2 | unselect(view); | |
| 171 | } | ||
| 172 |