vis-motions.c

   1 #include <regex.h>
   2 #include "vis-core.h"
   3 #include "text-motions.h"
   4 #include "text-objects.h"
   5 #include "text-util.h"
   6
   7 /** utility functions */
   8
   9 static char *get_word_at(Text *txt, size_t pos) {
  10         Filerange word = text_object_word(txt, pos);
  11         if (!text_range_valid(&word))
  12                 return NULL;
  13         return text_bytes_alloc0(txt, word.start, word.end - word.start);
  14 }
  15
  16 /** motion implementations */
  17
  18 static size_t search_word_forward(Vis *vis, Text *txt, size_t pos) {
  19         char *word = get_word_at(txt, pos);
  20         if (word && !text_regex_compile(vis->search_pattern, word, REG_EXTENDED))
  21                 pos = text_search_forward(txt, pos, vis->search_pattern);
  22         free(word);
  23         return pos;
  24 }
  25
  26 static size_t search_word_backward(Vis *vis, Text *txt, size_t pos) {
  27         char *word = get_word_at(txt, pos);
  28         if (word && !text_regex_compile(vis->search_pattern, word, REG_EXTENDED))
  29                 pos = text_search_backward(txt, pos, vis->search_pattern);
  30         free(word);
  31         return pos;
  32 }
  33
  34 static size_t search_forward(Vis *vis, Text *txt, size_t pos) {
  35         return text_search_forward(txt, pos, vis->search_pattern);
  36 }
  37
  38 static size_t search_backward(Vis *vis, Text *txt, size_t pos) {
  39         return text_search_backward(txt, pos, vis->search_pattern);
  40 }
  41
  42 static size_t mark_goto(Vis *vis, File *file, size_t pos) {
  43         return text_mark_get(file->text, file->marks[vis->action.mark]);
  44 }
  45
  46 static size_t mark_line_goto(Vis *vis, File *file, size_t pos) {
  47         return text_line_start(file->text, mark_goto(vis, file, pos));
  48 }
  49
  50 static size_t to(Vis *vis, Text *txt, size_t pos) {
  51         char c;
  52         size_t hit = text_line_find_next(txt, pos+1, vis->search_char);
  53         if (!text_byte_get(txt, hit, &c) || c != vis->search_char[0])
  54                 return pos;
  55         return hit;
  56 }
  57
  58 static size_t till(Vis *vis, Text *txt, size_t pos) {
  59         size_t hit = to(vis, txt, pos);
  60         if (hit != pos)
  61                 return text_char_prev(txt, hit);
  62         return pos;
  63 }
  64
  65 static size_t to_left(Vis *vis, Text *txt, size_t pos) {
  66         char c;
  67         if (pos == 0)
  68                 return pos;
  69         size_t hit = text_line_find_prev(txt, pos-1, vis->search_char);
  70         if (!text_byte_get(txt, hit, &c) || c != vis->search_char[0])
  71                 return pos;
  72         return hit;
  73 }
  74
  75 static size_t till_left(Vis *vis, Text *txt, size_t pos) {
  76         size_t hit = to_left(vis, txt, pos);
  77         if (hit != pos)
  78                 return text_char_next(txt, hit);
  79         return pos;
  80 }
  81
  82 static size_t line(Vis *vis, Text *txt, size_t pos) {
  83         return text_pos_by_lineno(txt, vis->action.count);
  84 }
  85
  86 static size_t column(Vis *vis, Text *txt, size_t pos) {
  87         return text_line_offset(txt, pos, vis->action.count);
  88 }
  89
  90 static size_t view_lines_top(Vis *vis, View *view) {
  91         return view_screenline_goto(view, vis->action.count);
  92 }
  93
  94 static size_t view_lines_middle(Vis *vis, View *view) {
  95         int h = view_height_get(view);
  96         return view_screenline_goto(view, h/2);
  97 }
  98
  99 static size_t view_lines_bottom(Vis *vis, View *view) {
 100         int h = view_height_get(vis->win->view);
 101         return view_screenline_goto(vis->win->view, h - vis->action.count);
 102 }
 103
 104 static size_t window_changelist_next(Vis *vis, Win *win, size_t pos) {
 105         ChangeList *cl = &win->changelist;
 106         Text *txt = win->file->text;
 107         time_t state = text_state(txt);
 108         if (cl->state != state)
 109                 cl->index = 0;
 110         else if (cl->index > 0 && pos == cl->pos)
 111                 cl->index--;
 112         size_t newpos = text_history_get(txt, cl->index);
 113         if (newpos == EPOS)
 114                 cl->index++;
 115         else
 116                 cl->pos = newpos;
 117         cl->state = state;
 118         return cl->pos;
 119 }
 120
 121 static size_t window_changelist_prev(Vis *vis, Win *win, size_t pos) {
 122         ChangeList *cl = &win->changelist;
 123         Text *txt = win->file->text;
 124         time_t state = text_state(txt);
 125         if (cl->state != state)
 126                 cl->index = 0;
 127         else if (pos == cl->pos)
 128                 win->changelist.index++;
 129         size_t newpos = text_history_get(txt, cl->index);
 130         if (newpos == EPOS)
 131                 cl->index--;
 132         else
 133                 cl->pos = newpos;
 134         cl->state = state;
 135         return cl->pos;
 136 }
 137
 138 static size_t window_jumplist_next(Vis *vis, Win *win, size_t cur) {
 139         while (win->jumplist) {
 140                 Mark mark = ringbuf_next(win->jumplist);
 141                 if (!mark)
 142                         return cur;
 143                 size_t pos = text_mark_get(win->file->text, mark);
 144                 if (pos != EPOS && pos != cur)
 145                         return pos;
 146         }
 147         return cur;
 148 }
 149
 150 static size_t window_jumplist_prev(Vis *vis, Win *win, size_t cur) {
 151         while (win->jumplist) {
 152                 Mark mark = ringbuf_prev(win->jumplist);
 153                 if (!mark)
 154                         return cur;
 155                 size_t pos = text_mark_get(win->file->text, mark);
 156                 if (pos != EPOS && pos != cur)
 157                         return pos;
 158         }
 159         return cur;
 160 }
 161
 162 static size_t window_nop(Vis *vis, Win *win, size_t pos) {
 163         return pos;
 164 }
 165
 166 Movement moves[] = {
 167         [VIS_MOVE_LINE_UP]             = { .cur = view_line_up,             .type = LINEWISE                 },
 168         [VIS_MOVE_LINE_DOWN]           = { .cur = view_line_down,           .type = LINEWISE                 },
 169         [VIS_MOVE_SCREEN_LINE_UP]      = { .cur = view_screenline_up,                                        },
 170         [VIS_MOVE_SCREEN_LINE_DOWN]    = { .cur = view_screenline_down,                                      },
 171         [VIS_MOVE_SCREEN_LINE_BEGIN]   = { .cur = view_screenline_begin,    .type = CHARWISE                 },
 172         [VIS_MOVE_SCREEN_LINE_MIDDLE]  = { .cur = view_screenline_middle,   .type = CHARWISE                 },
 173         [VIS_MOVE_SCREEN_LINE_END]     = { .cur = view_screenline_end,      .type = CHARWISE|INCLUSIVE       },
 174         [VIS_MOVE_LINE_PREV]           = { .txt = text_line_prev,                                            },
 175         [VIS_MOVE_LINE_BEGIN]          = { .txt = text_line_begin,                                           },
 176         [VIS_MOVE_LINE_START]          = { .txt = text_line_start,                                           },
 177         [VIS_MOVE_LINE_FINISH]         = { .txt = text_line_finish,         .type = INCLUSIVE                },
 178         [VIS_MOVE_LINE_LASTCHAR]       = { .txt = text_line_lastchar,       .type = INCLUSIVE                },
 179         [VIS_MOVE_LINE_END]            = { .txt = text_line_end,                                             },
 180         [VIS_MOVE_LINE_NEXT]           = { .txt = text_line_next,                                            },
 181         [VIS_MOVE_LINE]                = { .vis = line,                     .type = LINEWISE|IDEMPOTENT|JUMP },
 182         [VIS_MOVE_COLUMN]              = { .vis = column,                   .type = CHARWISE|IDEMPOTENT      },
 183         [VIS_MOVE_CHAR_PREV]           = { .txt = text_char_prev,           .type = CHARWISE                 },
 184         [VIS_MOVE_CHAR_NEXT]           = { .txt = text_char_next,           .type = CHARWISE                 },
 185         [VIS_MOVE_LINE_CHAR_PREV]      = { .txt = text_line_char_prev,      .type = CHARWISE                 },
 186         [VIS_MOVE_LINE_CHAR_NEXT]      = { .txt = text_line_char_next,      .type = CHARWISE                 },
 187         [VIS_MOVE_WORD_START_PREV]     = { .txt = text_word_start_prev,     .type = CHARWISE                 },
 188         [VIS_MOVE_WORD_START_NEXT]     = { .txt = text_word_start_next,     .type = CHARWISE                 },
 189         [VIS_MOVE_WORD_END_PREV]       = { .txt = text_word_end_prev,       .type = CHARWISE|INCLUSIVE       },
 190         [VIS_MOVE_WORD_END_NEXT]       = { .txt = text_word_end_next,       .type = CHARWISE|INCLUSIVE       },
 191         [VIS_MOVE_LONGWORD_START_PREV] = { .txt = text_longword_start_prev, .type = CHARWISE                 },
 192         [VIS_MOVE_LONGWORD_START_NEXT] = { .txt = text_longword_start_next, .type = CHARWISE                 },
 193         [VIS_MOVE_LONGWORD_END_PREV]   = { .txt = text_longword_end_prev,   .type = CHARWISE|INCLUSIVE       },
 194         [VIS_MOVE_LONGWORD_END_NEXT]   = { .txt = text_longword_end_next,   .type = CHARWISE|INCLUSIVE       },
 195         [VIS_MOVE_SENTENCE_PREV]       = { .txt = text_sentence_prev,       .type = LINEWISE                 },
 196         [VIS_MOVE_SENTENCE_NEXT]       = { .txt = text_sentence_next,       .type = LINEWISE                 },
 197         [VIS_MOVE_PARAGRAPH_PREV]      = { .txt = text_paragraph_prev,      .type = LINEWISE|JUMP            },
 198         [VIS_MOVE_PARAGRAPH_NEXT]      = { .txt = text_paragraph_next,      .type = LINEWISE|JUMP            },
 199         [VIS_MOVE_FUNCTION_START_PREV] = { .txt = text_function_start_prev, .type = LINEWISE|JUMP            },
 200         [VIS_MOVE_FUNCTION_START_NEXT] = { .txt = text_function_start_next, .type = LINEWISE|JUMP            },
 201         [VIS_MOVE_FUNCTION_END_PREV]   = { .txt = text_function_end_prev,   .type = LINEWISE|JUMP            },
 202         [VIS_MOVE_FUNCTION_END_NEXT]   = { .txt = text_function_end_next,   .type = LINEWISE|JUMP            },
 203         [VIS_MOVE_BRACKET_MATCH]       = { .txt = text_bracket_match,       .type = INCLUSIVE|JUMP           },
 204         [VIS_MOVE_FILE_BEGIN]          = { .txt = text_begin,               .type = LINEWISE|JUMP            },
 205         [VIS_MOVE_FILE_END]            = { .txt = text_end,                 .type = LINEWISE|JUMP            },
 206         [VIS_MOVE_LEFT_TO]             = { .vis = to_left,                                                   },
 207         [VIS_MOVE_RIGHT_TO]            = { .vis = to,                       .type = INCLUSIVE                },
 208         [VIS_MOVE_LEFT_TILL]           = { .vis = till_left,                                                 },
 209         [VIS_MOVE_RIGHT_TILL]          = { .vis = till,                     .type = INCLUSIVE                },
 210         [VIS_MOVE_MARK]                = { .file = mark_goto,               .type = JUMP|IDEMPOTENT          },
 211         [VIS_MOVE_MARK_LINE]           = { .file = mark_line_goto,          .type = LINEWISE|JUMP|IDEMPOTENT },
 212         [VIS_MOVE_SEARCH_WORD_FORWARD] = { .vis = search_word_forward,      .type = JUMP                     },
 213         [VIS_MOVE_SEARCH_WORD_BACKWARD]= { .vis = search_word_backward,     .type = JUMP                     },
 214         [VIS_MOVE_SEARCH_NEXT]         = { .vis = search_forward,           .type = JUMP                     },
 215         [VIS_MOVE_SEARCH_PREV]         = { .vis = search_backward,          .type = JUMP                     },
 216         [VIS_MOVE_WINDOW_LINE_TOP]     = { .view = view_lines_top,          .type = LINEWISE|JUMP|IDEMPOTENT },
 217         [VIS_MOVE_WINDOW_LINE_MIDDLE]  = { .view = view_lines_middle,       .type = LINEWISE|JUMP|IDEMPOTENT },
 218         [VIS_MOVE_WINDOW_LINE_BOTTOM]  = { .view = view_lines_bottom,       .type = LINEWISE|JUMP|IDEMPOTENT },
 219         [VIS_MOVE_CHANGELIST_NEXT]     = { .win = window_changelist_next,   .type = INCLUSIVE                },
 220         [VIS_MOVE_CHANGELIST_PREV]     = { .win = window_changelist_prev,   .type = INCLUSIVE                },
 221         [VIS_MOVE_JUMPLIST_NEXT]       = { .win = window_jumplist_next,     .type = INCLUSIVE                },
 222         [VIS_MOVE_JUMPLIST_PREV]       = { .win = window_jumplist_prev,     .type = INCLUSIVE                },
 223         [VIS_MOVE_NOP]                 = { .win = window_nop,               .type = IDEMPOTENT               },
 224 };
 225