vis-motions.c

   1 #include "vis-core.h"
   2 #include "text-motions.h"
   3 #include "text-objects.h"
   4 #include "text-util.h"
   5
   6 /** utility functions */
   7
   8 static char *get_word_at(Text *txt, size_t pos) {
   9         Filerange word = text_object_word(txt, pos);
  10         if (!text_range_valid(&word))
  11                 return NULL;
  12         size_t len = word.end - word.start;
  13         char *buf = malloc(len+1);
  14         if (!buf)
  15                 return NULL;
  16         len = text_bytes_get(txt, word.start, len, buf);
  17         buf[len] = '\0';
  18         return buf;
  19 }
  20
  21 /** motion implementations */
  22
  23 static size_t search_word_forward(Vis *vis, Text *txt, size_t pos) {
  24         char *word = get_word_at(txt, pos);
  25         if (word && !text_regex_compile(vis->search_pattern, word, REG_EXTENDED))
  26                 pos = text_search_forward(txt, pos, vis->search_pattern);
  27         free(word);
  28         return pos;
  29 }
  30
  31 static size_t search_word_backward(Vis *vis, Text *txt, size_t pos) {
  32         char *word = get_word_at(txt, pos);
  33         if (word && !text_regex_compile(vis->search_pattern, word, REG_EXTENDED))
  34                 pos = text_search_backward(txt, pos, vis->search_pattern);
  35         free(word);
  36         return pos;
  37 }
  38
  39 static size_t search_forward(Vis *vis, Text *txt, size_t pos) {
  40         return text_search_forward(txt, pos, vis->search_pattern);
  41 }
  42
  43 static size_t search_backward(Vis *vis, Text *txt, size_t pos) {
  44         return text_search_backward(txt, pos, vis->search_pattern);
  45 }
  46
  47 static size_t mark_goto(Vis *vis, File *file, size_t pos) {
  48         return text_mark_get(file->text, file->marks[vis->action.mark]);
  49 }
  50
  51 static size_t mark_line_goto(Vis *vis, File *file, size_t pos) {
  52         return text_line_start(file->text, mark_goto(vis, file, pos));
  53 }
  54
  55 static size_t to(Vis *vis, Text *txt, size_t pos) {
  56         char c;
  57         size_t hit = text_line_find_next(txt, pos+1, vis->search_char);
  58         if (!text_byte_get(txt, hit, &c) || c != vis->search_char[0])
  59                 return pos;
  60         return hit;
  61 }
  62
  63 static size_t till(Vis *vis, Text *txt, size_t pos) {
  64         size_t hit = to(vis, txt, pos);
  65         if (hit != pos)
  66                 return text_char_prev(txt, hit);
  67         return pos;
  68 }
  69
  70 static size_t to_left(Vis *vis, Text *txt, size_t pos) {
  71         char c;
  72         if (pos == 0)
  73                 return pos;
  74         size_t hit = text_line_find_prev(txt, pos-1, vis->search_char);
  75         if (!text_byte_get(txt, hit, &c) || c != vis->search_char[0])
  76                 return pos;
  77         return hit;
  78 }
  79
  80 static size_t till_left(Vis *vis, Text *txt, size_t pos) {
  81         size_t hit = to_left(vis, txt, pos);
  82         if (hit != pos)
  83                 return text_char_next(txt, hit);
  84         return pos;
  85 }
  86
  87 static size_t line(Vis *vis, Text *txt, size_t pos) {
  88         return text_pos_by_lineno(txt, vis->action.count);
  89 }
  90
  91 static size_t column(Vis *vis, Text *txt, size_t pos) {
  92         return text_line_offset(txt, pos, vis->action.count);
  93 }
  94
  95 static size_t view_lines_top(Vis *vis, View *view) {
  96         return view_screenline_goto(view, vis->action.count);
  97 }
  98
  99 static size_t view_lines_middle(Vis *vis, View *view) {
 100         int h = view_height_get(view);
 101         return view_screenline_goto(view, h/2);
 102 }
 103
 104 static size_t view_lines_bottom(Vis *vis, View *view) {
 105         int h = view_height_get(vis->win->view);
 106         return view_screenline_goto(vis->win->view, h - vis->action.count);
 107 }
 108
 109 static size_t window_changelist_next(Vis *vis, Win *win, size_t pos) {
 110         ChangeList *cl = &win->changelist;
 111         Text *txt = win->file->text;
 112         time_t state = text_state(txt);
 113         if (cl->state != state)
 114                 cl->index = 0;
 115         else if (cl->index > 0 && pos == cl->pos)
 116                 cl->index--;
 117         size_t newpos = text_history_get(txt, cl->index);
 118         if (newpos == EPOS)
 119                 cl->index++;
 120         else
 121                 cl->pos = newpos;
 122         cl->state = state;
 123         return cl->pos;
 124 }
 125
 126 static size_t window_changelist_prev(Vis *vis, Win *win, size_t pos) {
 127         ChangeList *cl = &win->changelist;
 128         Text *txt = win->file->text;
 129         time_t state = text_state(txt);
 130         if (cl->state != state)
 131                 cl->index = 0;
 132         else if (pos == cl->pos)
 133                 win->changelist.index++;
 134         size_t newpos = text_history_get(txt, cl->index);
 135         if (newpos == EPOS)
 136                 cl->index--;
 137         else
 138                 cl->pos = newpos;
 139         cl->state = state;
 140         return cl->pos;
 141 }
 142
 143 static size_t window_jumplist_next(Vis *vis, Win *win, size_t cur) {
 144         while (win->jumplist) {
 145                 Mark mark = ringbuf_next(win->jumplist);
 146                 if (!mark)
 147                         return cur;
 148                 size_t pos = text_mark_get(win->file->text, mark);
 149                 if (pos != EPOS && pos != cur)
 150                         return pos;
 151         }
 152         return cur;
 153 }
 154
 155 static size_t window_jumplist_prev(Vis *vis, Win *win, size_t cur) {
 156         while (win->jumplist) {
 157                 Mark mark = ringbuf_prev(win->jumplist);
 158                 if (!mark)
 159                         return cur;
 160                 size_t pos = text_mark_get(win->file->text, mark);
 161                 if (pos != EPOS && pos != cur)
 162                         return pos;
 163         }
 164         return cur;
 165 }
 166
 167 static size_t window_nop(Vis *vis, Win *win, size_t pos) {
 168         return pos;
 169 }
 170
 171 Movement moves[] = {
 172         [VIS_MOVE_LINE_UP]             = { .cur = view_line_up,            .type = LINEWISE                  },
 173         [VIS_MOVE_LINE_DOWN]           = { .cur = view_line_down,          .type = LINEWISE                  },
 174         [VIS_MOVE_SCREEN_LINE_UP]      = { .cur = view_screenline_up,                                        },
 175         [VIS_MOVE_SCREEN_LINE_DOWN]    = { .cur = view_screenline_down,                                      },
 176         [VIS_MOVE_SCREEN_LINE_BEGIN]   = { .cur = view_screenline_begin,   .type = CHARWISE                  },
 177         [VIS_MOVE_SCREEN_LINE_MIDDLE]  = { .cur = view_screenline_middle,  .type = CHARWISE                  },
 178         [VIS_MOVE_SCREEN_LINE_END]     = { .cur = view_screenline_end,     .type = CHARWISE|INCLUSIVE        },
 179         [VIS_MOVE_LINE_PREV]           = { .txt = text_line_prev,                                            },
 180         [VIS_MOVE_LINE_BEGIN]          = { .txt = text_line_begin,                                           },
 181         [VIS_MOVE_LINE_START]          = { .txt = text_line_start,                                           },
 182         [VIS_MOVE_LINE_FINISH]         = { .txt = text_line_finish,         .type = INCLUSIVE                },
 183         [VIS_MOVE_LINE_LASTCHAR]       = { .txt = text_line_lastchar,       .type = INCLUSIVE                },
 184         [VIS_MOVE_LINE_END]            = { .txt = text_line_end,                                             },
 185         [VIS_MOVE_LINE_NEXT]           = { .txt = text_line_next,                                            },
 186         [VIS_MOVE_LINE]                = { .vis = line,                     .type = LINEWISE|IDEMPOTENT|JUMP },
 187         [VIS_MOVE_COLUMN]              = { .vis = column,                   .type = CHARWISE|IDEMPOTENT      },
 188         [VIS_MOVE_CHAR_PREV]           = { .txt = text_char_prev,           .type = CHARWISE                 },
 189         [VIS_MOVE_CHAR_NEXT]           = { .txt = text_char_next,           .type = CHARWISE                 },
 190         [VIS_MOVE_LINE_CHAR_PREV]      = { .txt = text_line_char_prev,      .type = CHARWISE                 },
 191         [VIS_MOVE_LINE_CHAR_NEXT]      = { .txt = text_line_char_next,      .type = CHARWISE                 },
 192         [VIS_MOVE_WORD_START_PREV]     = { .txt = text_word_start_prev,     .type = CHARWISE                 },
 193         [VIS_MOVE_WORD_START_NEXT]     = { .txt = text_word_start_next,     .type = CHARWISE                 },
 194         [VIS_MOVE_WORD_END_PREV]       = { .txt = text_word_end_prev,       .type = CHARWISE|INCLUSIVE       },
 195         [VIS_MOVE_WORD_END_NEXT]       = { .txt = text_word_end_next,       .type = CHARWISE|INCLUSIVE       },
 196         [VIS_MOVE_LONGWORD_START_PREV] = { .txt = text_longword_start_prev, .type = CHARWISE                 },
 197         [VIS_MOVE_LONGWORD_START_NEXT] = { .txt = text_longword_start_next, .type = CHARWISE                 },
 198         [VIS_MOVE_LONGWORD_END_PREV]   = { .txt = text_longword_end_prev,   .type = CHARWISE|INCLUSIVE       },
 199         [VIS_MOVE_LONGWORD_END_NEXT]   = { .txt = text_longword_end_next,   .type = CHARWISE|INCLUSIVE       },
 200         [VIS_MOVE_SENTENCE_PREV]       = { .txt = text_sentence_prev,       .type = LINEWISE                 },
 201         [VIS_MOVE_SENTENCE_NEXT]       = { .txt = text_sentence_next,       .type = LINEWISE                 },
 202         [VIS_MOVE_PARAGRAPH_PREV]      = { .txt = text_paragraph_prev,      .type = LINEWISE|JUMP            },
 203         [VIS_MOVE_PARAGRAPH_NEXT]      = { .txt = text_paragraph_next,      .type = LINEWISE|JUMP            },
 204         [VIS_MOVE_FUNCTION_START_PREV] = { .txt = text_function_start_prev, .type = LINEWISE|JUMP            },
 205         [VIS_MOVE_FUNCTION_START_NEXT] = { .txt = text_function_start_next, .type = LINEWISE|JUMP            },
 206         [VIS_MOVE_FUNCTION_END_PREV]   = { .txt = text_function_end_prev,   .type = LINEWISE|JUMP            },
 207         [VIS_MOVE_FUNCTION_END_NEXT]   = { .txt = text_function_end_next,   .type = LINEWISE|JUMP            },
 208         [VIS_MOVE_BRACKET_MATCH]       = { .txt = text_bracket_match,       .type = INCLUSIVE|JUMP           },
 209         [VIS_MOVE_FILE_BEGIN]          = { .txt = text_begin,               .type = LINEWISE|JUMP            },
 210         [VIS_MOVE_FILE_END]            = { .txt = text_end,                 .type = LINEWISE|JUMP            },
 211         [VIS_MOVE_LEFT_TO]             = { .vis = to_left,                                                   },
 212         [VIS_MOVE_RIGHT_TO]            = { .vis = to,                       .type = INCLUSIVE                },
 213         [VIS_MOVE_LEFT_TILL]           = { .vis = till_left,                                                 },
 214         [VIS_MOVE_RIGHT_TILL]          = { .vis = till,                     .type = INCLUSIVE                },
 215         [VIS_MOVE_MARK]                = { .file = mark_goto,               .type = JUMP|IDEMPOTENT          },
 216         [VIS_MOVE_MARK_LINE]           = { .file = mark_line_goto,          .type = LINEWISE|JUMP|IDEMPOTENT },
 217         [VIS_MOVE_SEARCH_WORD_FORWARD] = { .vis = search_word_forward,      .type = JUMP                     },
 218         [VIS_MOVE_SEARCH_WORD_BACKWARD]= { .vis = search_word_backward,     .type = JUMP                     },
 219         [VIS_MOVE_SEARCH_NEXT]         = { .vis = search_forward,           .type = JUMP                     },
 220         [VIS_MOVE_SEARCH_PREV]         = { .vis = search_backward,          .type = JUMP                     },
 221         [VIS_MOVE_WINDOW_LINE_TOP]     = { .view = view_lines_top,          .type = LINEWISE|JUMP|IDEMPOTENT },
 222         [VIS_MOVE_WINDOW_LINE_MIDDLE]  = { .view = view_lines_middle,       .type = LINEWISE|JUMP|IDEMPOTENT },
 223         [VIS_MOVE_WINDOW_LINE_BOTTOM]  = { .view = view_lines_bottom,       .type = LINEWISE|JUMP|IDEMPOTENT },
 224         [VIS_MOVE_CHANGELIST_NEXT]     = { .win = window_changelist_next,   .type = INCLUSIVE                },
 225         [VIS_MOVE_CHANGELIST_PREV]     = { .win = window_changelist_prev,   .type = INCLUSIVE                },
 226         [VIS_MOVE_JUMPLIST_NEXT]       = { .win = window_jumplist_next,     .type = INCLUSIVE                },
 227         [VIS_MOVE_JUMPLIST_PREV]       = { .win = window_jumplist_prev,     .type = INCLUSIVE                },
 228         [VIS_MOVE_NOP]                 = { .win = window_nop,               .type = IDEMPOTENT               },
 229 };
 230