source: viewwin.c @ 09065ed

release-1.7release-1.8release-1.9
Last change on this file since 09065ed was 09065ed, checked in by David Benjamin <davidben@mit.edu>, 11 years ago
If popless:start-search is passed "", continue search Matches behavior with pressing / RET in both the recwin and less itself. Reported-By: Anders Kaseorg <andersk@mit.edu>
  • Property mode set to 100644
File size: 12.3 KB
RevLine 
[7d4fbcd]1#include <string.h>
2#include "owl.h"
3
4#define BOTTOM_OFFSET 1
[9116936]5#define EMPTY_INDICATOR "~"
[7d4fbcd]6
[60c1386]7static void owl_viewwin_redraw_content(owl_window *w, WINDOW *curswin, void *user_data);
8static void owl_viewwin_redraw_status(owl_window *w, WINDOW *curswin, void *user_data);
9static void owl_viewwin_layout(owl_viewwin *v);
[61c1f19]10static void owl_viewwin_set_window(owl_viewwin *v, owl_window *w);
[0b9e607]11
[9eb38bb]12/* Create a viewwin.  'win' is an already initialized owl_window that
13 * will be used by the viewwin
[b2b0773]14 */
[9eb38bb]15owl_viewwin *owl_viewwin_new_text(owl_window *win, const char *text)
[b2b0773]16{
[9eb38bb]17  owl_viewwin *v = owl_malloc(sizeof(owl_viewwin));
18  memset(v, 0, sizeof(*v));
[7d4fbcd]19  owl_fmtext_init_null(&(v->fmtext));
20  if (text) {
21    owl_fmtext_append_normal(&(v->fmtext), text);
[4083c49]22    if (text[0] != '\0' && text[strlen(text) - 1] != '\n') {
[7d4fbcd]23      owl_fmtext_append_normal(&(v->fmtext), "\n");
24    }
25    v->textlines=owl_fmtext_num_lines(&(v->fmtext));
26  }
27  v->topline=0;
28  v->rightshift=0;
[afbf668]29  v->onclose_hook = NULL;
[68f63a2]30
31  owl_viewwin_set_window(v, win);
[9eb38bb]32  return v;
[afbf668]33}
34
[9eb38bb]35/* Create a viewwin.  'win' is an already initialized owl_window that
36 * will be used by the viewwin
[b2b0773]37 */
[9eb38bb]38owl_viewwin *owl_viewwin_new_fmtext(owl_window *win, const owl_fmtext *fmtext)
[b2b0773]39{
[dd6af02]40  char *text;
[9eb38bb]41  owl_viewwin *v = owl_malloc(sizeof(owl_viewwin));
42  memset(v, 0, sizeof(*v));
[dd6af02]43
[7d4fbcd]44  owl_fmtext_copy(&(v->fmtext), fmtext);
[dd6af02]45  text = owl_fmtext_print_plain(fmtext);
46  if (text[0] != '\0' && text[strlen(text) - 1] != '\n') {
47      owl_fmtext_append_normal(&(v->fmtext), "\n");
48  }
[3e55268]49  owl_free(text);
[7d4fbcd]50  v->textlines=owl_fmtext_num_lines(&(v->fmtext));
51  v->topline=0;
52  v->rightshift=0;
[68f63a2]53
54  owl_viewwin_set_window(v, win);
[9eb38bb]55  return v;
[7d4fbcd]56}
57
[61c1f19]58static void owl_viewwin_set_window(owl_viewwin *v, owl_window *w)
[b2b0773]59{
[60c1386]60  v->window = g_object_ref(w);
61  v->content = owl_window_new(v->window);
62  v->status = owl_window_new(v->window);
[09ceee3]63  v->cmdwin = NULL;
[60c1386]64
65  v->sig_content_redraw_id =
66    g_signal_connect(v->content, "redraw", G_CALLBACK(owl_viewwin_redraw_content), v);
67  v->sig_status_redraw_id =
68    g_signal_connect(v->status, "redraw", G_CALLBACK(owl_viewwin_redraw_status), v);
69  v->sig_resize_id =
70    g_signal_connect_swapped(v->window, "resized", G_CALLBACK(owl_viewwin_layout), v);
71  owl_viewwin_layout(v);
72
73  owl_window_show(v->content);
74  owl_window_show(v->status);
[7d4fbcd]75}
76
[afbf668]77void owl_viewwin_set_onclose_hook(owl_viewwin *v, void (*onclose_hook) (owl_viewwin *vwin, void *data), void *onclose_hook_data) {
78  v->onclose_hook = onclose_hook;
79  v->onclose_hook_data = onclose_hook_data;
80}
81
[60c1386]82static void owl_viewwin_layout(owl_viewwin *v)
83{
84  int lines, cols;
85  owl_window_get_position(v->window, &lines, &cols, NULL, NULL);
86  owl_window_set_position(v->content, lines - BOTTOM_OFFSET, cols, 0, 0);
[09ceee3]87  /* Only one of these will be visible at a time: */
[60c1386]88  owl_window_set_position(v->status, BOTTOM_OFFSET, cols, lines - BOTTOM_OFFSET, 0);
[09ceee3]89  if (v->cmdwin)
90    owl_window_set_position(v->cmdwin, BOTTOM_OFFSET, cols, lines - BOTTOM_OFFSET, 0);
[60c1386]91}
92
[b2b0773]93/* regenerate text on the curses window. */
[60c1386]94static void owl_viewwin_redraw_content(owl_window *w, WINDOW *curswin, void *user_data)
[b2b0773]95{
[7d4fbcd]96  owl_fmtext fm1, fm2;
[68f63a2]97  owl_viewwin *v = user_data;
[c447d9c]98  int winlines, wincols;
[9116936]99  int y;
[c447d9c]100
101  owl_window_get_position(w, &winlines, &wincols, 0, 0);
[60c1386]102
[68f63a2]103  werase(curswin);
104  wmove(curswin, 0, 0);
[7d4fbcd]105
[af2ca19]106  owl_fmtext_init_null(&fm1);
107  owl_fmtext_init_null(&fm2);
[60c1386]108
109  owl_fmtext_truncate_lines(&(v->fmtext), v->topline, winlines, &fm1);
[c447d9c]110  owl_fmtext_truncate_cols(&fm1, v->rightshift, wincols-1+v->rightshift, &fm2);
[7d4fbcd]111
[449c682]112  owl_fmtext_curs_waddstr(&fm2, curswin);
[7d4fbcd]113
[9116936]114  /* Fill remaining lines with tildes. */
115  y = v->textlines - v->topline;
116  wmove(curswin, y, 0);
[60c1386]117  for (; y < winlines; y++) {
[9116936]118    waddstr(curswin, EMPTY_INDICATOR);
119    waddstr(curswin, "\n");
120  }
121
[60c1386]122  owl_fmtext_cleanup(&fm1);
123  owl_fmtext_cleanup(&fm2);
124}
125
126static void owl_viewwin_redraw_status(owl_window *w, WINDOW *curswin, void *user_data)
127{
128  owl_viewwin *v = user_data;
129  int winlines, wincols;
130
131  owl_window_get_position(v->content, &winlines, &wincols, 0, 0);
132
133  werase(curswin);
134  wmove(curswin, 0, 0);
[68f63a2]135  wattrset(curswin, A_REVERSE);
[60c1386]136  if (v->textlines - v->topline > winlines) {
[68f63a2]137    waddstr(curswin, "--More-- (Space to see more, 'q' to quit)");
[7d4fbcd]138  } else {
[68f63a2]139    waddstr(curswin, "--End-- (Press 'q' to quit)");
[7d4fbcd]140  }
[68f63a2]141  wattroff(curswin, A_REVERSE);
[7d4fbcd]142}
143
[b6cf72f]144char *owl_viewwin_command_search(owl_viewwin *v, int argc, const char *const *argv, const char *buff)
145{
[118c919]146  int direction, consider_current;
[b6cf72f]147  const char *buffstart;
148
149  direction=OWL_DIRECTION_DOWNWARDS;
150  buffstart=skiptokens(buff, 1);
151  if (argc>1 && !strcmp(argv[1], "-r")) {
152    direction=OWL_DIRECTION_UPWARDS;
153    buffstart=skiptokens(buff, 2);
154  }
155
156  if (argc==1 || (argc==2 && !strcmp(argv[1], "-r"))) {
[118c919]157    consider_current = false;
[b6cf72f]158  } else {
159    owl_function_set_search(buffstart);
[118c919]160    consider_current = true;
[b6cf72f]161  }
162
[118c919]163  if (!owl_viewwin_search(v, owl_global_get_search_re(&g), consider_current, direction))
[b6cf72f]164    owl_function_error("No more matches");
165  return NULL;
166}
167
[d2fd2f7]168typedef struct _owl_viewwin_search_data { /*noproto*/
169  owl_viewwin *v;
170  int direction;
171} owl_viewwin_search_data;
172
173static void owl_viewwin_callback_search(owl_editwin *e)
174{
[09065ed]175  int consider_current = false;
[d2fd2f7]176  const char *line = owl_editwin_get_text(e);
177  owl_viewwin_search_data *data = owl_editwin_get_cbdata(e);
[09065ed]178
179  /* Given an empty string, just continue the current search. */
180  if (line && *line) {
181    owl_function_set_search(line);
182    consider_current = true;
183  }
[d2fd2f7]184  if (!owl_viewwin_search(data->v, owl_global_get_search_re(&g),
[09065ed]185                          consider_current, data->direction))
[d2fd2f7]186    owl_function_error("No matches");
187}
188
189char *owl_viewwin_command_start_search(owl_viewwin *v, int argc, const char *const *argv, const char *buff)
190{
191  int direction;
192  const char *buffstart;
193  owl_editwin *tw;
194  owl_context *ctx;
195  owl_viewwin_search_data *data;
196
197  direction=OWL_DIRECTION_DOWNWARDS;
198  buffstart=skiptokens(buff, 1);
199  if (argc>1 && !strcmp(argv[1], "-r")) {
200    direction=OWL_DIRECTION_UPWARDS;
201    buffstart=skiptokens(buff, 2);
202  }
203
204  /* TODO: Add a search history? */
205  tw = owl_viewwin_set_typwin_active(v, NULL);
206  owl_editwin_set_locktext(tw, (direction == OWL_DIRECTION_DOWNWARDS) ? "/" : "?");
207  owl_editwin_insert_string(tw, buffstart);
208
209  data = owl_malloc(sizeof(owl_viewwin_search_data));
210  data->v = v;
211  data->direction = direction;
212
[4a41f16]213  ctx = owl_editcontext_new(OWL_CTX_EDITLINE, tw, "editline",
214                            owl_viewwin_deactivate_editcontext, v);
[d2fd2f7]215  ctx->cbdata = v;
216  owl_global_push_context_obj(&g, ctx);
217  owl_editwin_set_callback(tw, owl_viewwin_callback_search);
218  owl_editwin_set_cbdata(tw, data, owl_free);
219  return NULL;
220}
221
[09ceee3]222char *owl_viewwin_start_command(owl_viewwin *v, int argc, const char *const *argv, const char *buff)
223{
224  owl_editwin *tw;
225  owl_context *ctx;
226
227  buff = skiptokens(buff, 1);
228
229  tw = owl_viewwin_set_typwin_active(v, owl_global_get_cmd_history(&g));
230  owl_editwin_set_locktext(tw, ":");
231
232  owl_editwin_insert_string(tw, buff);
233
[4a41f16]234  ctx = owl_editcontext_new(OWL_CTX_EDITLINE, tw, "editline",
235                            owl_viewwin_deactivate_editcontext, v);
[09ceee3]236  owl_global_push_context_obj(&g, ctx);
237  owl_editwin_set_callback(tw, owl_callback_command);
238
239  return NULL;
240}
241
242void owl_viewwin_deactivate_editcontext(owl_context *ctx) {
243  owl_viewwin *v = ctx->cbdata;
244  owl_viewwin_set_typwin_inactive(v);
245}
246
247owl_editwin *owl_viewwin_set_typwin_active(owl_viewwin *v, owl_history *hist) {
248  int lines, cols;
[1b8c3f8]249  owl_editwin *cmdline;
250  if (v->cmdwin)
[09ceee3]251    return NULL;
252  /* Create the command line. */
253  v->cmdwin = owl_window_new(v->window);
254  owl_viewwin_layout(v);
255  owl_window_get_position(v->cmdwin, &lines, &cols, NULL, NULL);
[1b8c3f8]256  cmdline = owl_editwin_new(v->cmdwin, lines, cols, OWL_EDITWIN_STYLE_ONELINE, hist);
[09ceee3]257  /* Swap out the bottom window. */
258  owl_window_hide(v->status);
259  owl_window_show(v->cmdwin);
[1b8c3f8]260  return cmdline;
[09ceee3]261}
262
263void owl_viewwin_set_typwin_inactive(owl_viewwin *v) {
264  if (v->cmdwin) {
265    /* Swap out the bottom window. */
266    owl_window_hide(v->cmdwin);
267    owl_window_show(v->status);
268    /* Destroy the window itself. */
269    owl_window_unlink(v->cmdwin);
270    g_object_unref(v->cmdwin);
271    v->cmdwin = NULL;
272  }
273}
274
[2640b63]275void owl_viewwin_append_text(owl_viewwin *v, const char *text) {
276    owl_fmtext_append_normal(&(v->fmtext), text);
277    v->textlines=owl_fmtext_num_lines(&(v->fmtext));
278    owl_viewwin_dirty(v);
279}
280
281/* Schedule a redraw of 'v'. Exported for hooking into the search
282   string; when we have some way of listening for changes, this can be
283   removed. */
284void owl_viewwin_dirty(owl_viewwin *v)
285{
[60c1386]286  owl_window_dirty(v->content);
287  owl_window_dirty(v->status);
[2640b63]288}
289
[d574d61]290void owl_viewwin_down(owl_viewwin *v, int amount) {
[c447d9c]291  int winlines;
[60c1386]292  owl_window_get_position(v->content, &winlines, 0, 0, 0);
[fa23002]293  /* Don't scroll past the bottom. */
[60c1386]294  amount = MIN(amount, v->textlines - (v->topline + winlines));
[fa23002]295  /* But if we're already past the bottom, don't back up either. */
296  if (amount > 0) {
297    v->topline += amount;
298    owl_viewwin_dirty(v);
[7d4fbcd]299  }
300}
301
[d574d61]302void owl_viewwin_up(owl_viewwin *v, int amount)
303{
304  v->topline -= amount;
305  if (v->topline<0) v->topline=0;
306  owl_viewwin_dirty(v);
307}
308
309void owl_viewwin_pagedown(owl_viewwin *v)
[b2b0773]310{
[c447d9c]311  int winlines;
[60c1386]312  owl_window_get_position(v->content, &winlines, 0, 0, 0);
313  owl_viewwin_down(v, winlines);
[d574d61]314}
315
316void owl_viewwin_linedown(owl_viewwin *v)
317{
318  owl_viewwin_down(v, 1);
[7d4fbcd]319}
320
[b2b0773]321void owl_viewwin_pageup(owl_viewwin *v)
322{
[c447d9c]323  int winlines;
[60c1386]324  owl_window_get_position(v->content, &winlines, 0, 0, 0);
325  owl_viewwin_up(v, winlines);
[7d4fbcd]326}
327
[b2b0773]328void owl_viewwin_lineup(owl_viewwin *v)
329{
[d574d61]330  owl_viewwin_up(v, 1);
[7d4fbcd]331}
332
[b2b0773]333void owl_viewwin_right(owl_viewwin *v, int n)
334{
[7d4fbcd]335  v->rightshift+=n;
[5b68c05]336  owl_viewwin_dirty(v);
[7d4fbcd]337}
338
[b2b0773]339void owl_viewwin_left(owl_viewwin *v, int n)
340{
[7d4fbcd]341  v->rightshift-=n;
342  if (v->rightshift<0) v->rightshift=0;
[5b68c05]343  owl_viewwin_dirty(v);
[7d4fbcd]344}
345
[b2b0773]346void owl_viewwin_top(owl_viewwin *v)
347{
[7d4fbcd]348  v->topline=0;
349  v->rightshift=0;
[5b68c05]350  owl_viewwin_dirty(v);
[7d4fbcd]351}
352
[b2b0773]353void owl_viewwin_bottom(owl_viewwin *v)
354{
[c447d9c]355  int winlines;
[60c1386]356  owl_window_get_position(v->content, &winlines, 0, 0, 0);
357  v->topline = v->textlines - winlines;
[5b68c05]358  owl_viewwin_dirty(v);
[7d4fbcd]359}
360
[6a35938]361/* This is a bit of a hack, because regexec doesn't have an 'n'
362 * version. */
363static int _re_memcompare(const owl_regex *re, const char *string, int start, int end)
364{
365  int ans;
366  char *tmp = g_strndup(string + start, end - start);
367  ans = owl_regex_compare(re, tmp, NULL, NULL);
368  g_free(tmp);
369  return !ans;
370}
371
[b8742ba]372/* Scroll in 'direction' to the next line containing 're' in 'v',
373 * starting from the current line. Returns 0 if no occurrence is
374 * found.
375 *
[118c919]376 * If consider_current is true then stay on the current line
[9c1e61d]377 * if it matches.
[b8742ba]378 */
[118c919]379int owl_viewwin_search(owl_viewwin *v, const owl_regex *re, int consider_current, int direction)
[b8742ba]380{
381  int start, end, offset;
[6a35938]382  int lineend, linestart;
383  const char *buf, *linestartp;
[b8742ba]384  owl_fmtext_line_extents(&v->fmtext, v->topline, &start, &end);
385  if (direction == OWL_DIRECTION_DOWNWARDS) {
[9c1e61d]386    offset = owl_fmtext_search(&v->fmtext, re,
[118c919]387                               consider_current ? start : end);
[b8742ba]388    if (offset < 0)
389      return 0;
390    v->topline = owl_fmtext_line_number(&v->fmtext, offset);
391    owl_viewwin_dirty(v);
392    return 1;
393  } else {
[6a35938]394    /* TODO: This is a hack. Really, we should have an owl_fmlines or
395     * something containing an array of owl_fmtext split into
396     * lines. Also, it cannot handle multi-line regex, if we ever care about
397     * them. */
398    buf = owl_fmtext_get_text(&v->fmtext);
[118c919]399    lineend = consider_current ? end : start;
[6a35938]400    while (lineend > 0) {
401      linestartp = memrchr(buf, '\n', lineend - 1);
402      linestart = linestartp ? linestartp - buf + 1 : 0;
403      if (_re_memcompare(re, buf, linestart, lineend)) {
404        v->topline = owl_fmtext_line_number(&v->fmtext, linestart);
405        owl_viewwin_dirty(v);
406        return 1;
407      }
408      lineend = linestart;
409    }
410    return 0;
[b8742ba]411  }
412}
413
[9eb38bb]414void owl_viewwin_delete(owl_viewwin *v)
[b2b0773]415{
[afbf668]416  if (v->onclose_hook) {
417    v->onclose_hook(v, v->onclose_hook_data);
[8721756]418    v->onclose_hook = NULL;
419    v->onclose_hook_data = NULL;
[afbf668]420  }
[09ceee3]421  owl_viewwin_set_typwin_inactive(v);
[60c1386]422  /* TODO: This is far too tedious. owl_viewwin should own v->window
423   * and just unlink it in one go. Signals should also go away for
424   * free. */
425  g_signal_handler_disconnect(v->window, v->sig_resize_id);
426  g_signal_handler_disconnect(v->content, v->sig_content_redraw_id);
427  g_signal_handler_disconnect(v->status, v->sig_status_redraw_id);
428  owl_window_unlink(v->content);
429  owl_window_unlink(v->status);
430  g_object_unref(v->window);
431  g_object_unref(v->content);
432  g_object_unref(v->status);
[7ab0020]433  owl_fmtext_cleanup(&(v->fmtext));
[9eb38bb]434  owl_free(v);
[7d4fbcd]435}
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