source: viewwin.c @ 2b6622a6

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Last change on this file since 2b6622a6 was dd6af02, checked in by Alejandro R. Sedeño <asedeno@mit.edu>, 12 years ago
Revert 7b4d90e... and just fix #51 owl_fmtext_truncate_cols once again expects that fmtext ends in a newline. Revert documentation changes and remove test that now breaks while testing out-of-spec text. In owl_viewwin_init_fmtext, check that fmtext ends in a newline and append one if necessary.
  • Property mode set to 100644
File size: 3.9 KB
Line 
1#include <string.h>
2#include "owl.h"
3
4#define BOTTOM_OFFSET 1
5
6/* initialize the viewwin e.  'win' is an already initialzed curses
7 * window that will be used by viewwin
8 */
9void owl_viewwin_init_text(owl_viewwin *v, WINDOW *win, int winlines, int wincols, const char *text)
10{
11  owl_fmtext_init_null(&(v->fmtext));
12  if (text) {
13    owl_fmtext_append_normal(&(v->fmtext), text);
14    if (text[0] != '\0' && text[strlen(text) - 1] != '\n') {
15      owl_fmtext_append_normal(&(v->fmtext), "\n");
16    }
17    v->textlines=owl_fmtext_num_lines(&(v->fmtext));
18  }
19  v->topline=0;
20  v->rightshift=0;
21  v->winlines=winlines;
22  v->wincols=wincols;
23  v->curswin=win;
24  v->onclose_hook = NULL;
25}
26
27void owl_viewwin_append_text(owl_viewwin *v, const char *text) {
28    owl_fmtext_append_normal(&(v->fmtext), text);
29    v->textlines=owl_fmtext_num_lines(&(v->fmtext)); 
30}
31
32/* initialize the viewwin e.  'win' is an already initialzed curses
33 * window that will be used by viewwin
34 */
35void owl_viewwin_init_fmtext(owl_viewwin *v, WINDOW *win, int winlines, int wincols, const owl_fmtext *fmtext)
36{
37  char *text;
38
39  owl_fmtext_copy(&(v->fmtext), fmtext);
40  text = owl_fmtext_print_plain(fmtext);
41  if (text[0] != '\0' && text[strlen(text) - 1] != '\n') {
42      owl_fmtext_append_normal(&(v->fmtext), "\n");
43  }
44  v->textlines=owl_fmtext_num_lines(&(v->fmtext));
45  v->topline=0;
46  v->rightshift=0;
47  v->winlines=winlines;
48  v->wincols=wincols;
49  v->curswin=win;
50}
51
52void owl_viewwin_set_curswin(owl_viewwin *v, WINDOW *w, int winlines, int wincols)
53{
54  v->curswin=w;
55  v->winlines=winlines;
56  v->wincols=wincols;
57}
58
59void owl_viewwin_set_onclose_hook(owl_viewwin *v, void (*onclose_hook) (owl_viewwin *vwin, void *data), void *onclose_hook_data) {
60  v->onclose_hook = onclose_hook;
61  v->onclose_hook_data = onclose_hook_data;
62}
63
64/* regenerate text on the curses window. */
65/* if update == 1 then do a doupdate() */
66void owl_viewwin_redisplay(owl_viewwin *v, int update)
67{
68  owl_fmtext fm1, fm2;
69 
70  werase(v->curswin);
71  wmove(v->curswin, 0, 0);
72
73  owl_fmtext_init_null(&fm1);
74  owl_fmtext_init_null(&fm2);
75 
76  owl_fmtext_truncate_lines(&(v->fmtext), v->topline, v->winlines-BOTTOM_OFFSET, &fm1);
77  owl_fmtext_truncate_cols(&fm1, v->rightshift, v->wincols-1+v->rightshift, &fm2);
78
79  owl_fmtext_curs_waddstr_without_search(&fm2, v->curswin);
80
81  /* print the message at the bottom */
82  wmove(v->curswin, v->winlines-1, 0);
83  wattrset(v->curswin, A_REVERSE);
84  if (v->textlines - v->topline > v->winlines-BOTTOM_OFFSET) {
85    waddstr(v->curswin, "--More-- (Space to see more, 'q' to quit)");
86  } else {
87    waddstr(v->curswin, "--End-- (Press 'q' to quit)");
88  }
89  wattroff(v->curswin, A_REVERSE);
90  wnoutrefresh(v->curswin);
91
92  if (update==1) {
93    doupdate();
94  }
95
96  owl_fmtext_free(&fm1);
97  owl_fmtext_free(&fm2);
98}
99
100void owl_viewwin_pagedown(owl_viewwin *v)
101{
102  v->topline+=v->winlines - BOTTOM_OFFSET;
103  if ( (v->topline+v->winlines-BOTTOM_OFFSET) > v->textlines) {
104    v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
105  }
106}
107
108void owl_viewwin_linedown(owl_viewwin *v)
109{
110  v->topline++;
111  if ( (v->topline+v->winlines-BOTTOM_OFFSET) > v->textlines) {
112    v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
113  }
114}
115
116void owl_viewwin_pageup(owl_viewwin *v)
117{
118  v->topline-=v->winlines;
119  if (v->topline<0) v->topline=0;
120}
121
122void owl_viewwin_lineup(owl_viewwin *v)
123{
124  v->topline--;
125  if (v->topline<0) v->topline=0;
126}
127
128void owl_viewwin_right(owl_viewwin *v, int n)
129{
130  v->rightshift+=n;
131}
132
133void owl_viewwin_left(owl_viewwin *v, int n)
134{
135  v->rightshift-=n;
136  if (v->rightshift<0) v->rightshift=0;
137}
138
139void owl_viewwin_top(owl_viewwin *v)
140{
141  v->topline=0;
142  v->rightshift=0;
143}
144
145void owl_viewwin_bottom(owl_viewwin *v)
146{
147  v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
148}
149
150void owl_viewwin_free(owl_viewwin *v)
151{
152  if (v->onclose_hook) {
153    v->onclose_hook(v, v->onclose_hook_data);
154    v->onclose_hook = NULL;
155    v->onclose_hook_data = NULL;
156  }
157  owl_fmtext_free(&(v->fmtext));
158}
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