source: viewwin.c @ 18a54ee

barnowl_perlaimdebianowlrelease-1.10release-1.4release-1.5release-1.6release-1.7release-1.8release-1.9
Last change on this file since 18a54ee was 8721756, checked in by Erik Nygren <nygren@mit.edu>, 21 years ago
oops. make sure to null out reference to viewwin close hook after running it.
  • Property mode set to 100644
File size: 3.7 KB
Line 
1#include <string.h>
2#include "owl.h"
3
4static const char fileIdent[] = "$Id$";
5
6#define BOTTOM_OFFSET 1
7
8/* initialize the viewwin e.  'win' is an already initialzed curses
9 * window that will be used by viewwin
10 */
11void owl_viewwin_init_text(owl_viewwin *v, WINDOW *win, int winlines, int wincols, char *text)
12{
13  owl_fmtext_init_null(&(v->fmtext));
14  if (text) {
15    owl_fmtext_append_normal(&(v->fmtext), text);
16    if (text[strlen(text)-1]!='\n' && text[0]!='\0') {
17      owl_fmtext_append_normal(&(v->fmtext), "\n");
18    }
19    v->textlines=owl_fmtext_num_lines(&(v->fmtext));
20  }
21  v->topline=0;
22  v->rightshift=0;
23  v->winlines=winlines;
24  v->wincols=wincols;
25  v->curswin=win;
26  v->onclose_hook = NULL;
27}
28
29void owl_viewwin_append_text(owl_viewwin *v, char *text) {
30    owl_fmtext_append_normal(&(v->fmtext), text);
31    v->textlines=owl_fmtext_num_lines(&(v->fmtext)); 
32}
33
34/* initialize the viewwin e.  'win' is an already initialzed curses
35 * window that will be used by viewwin
36 */
37void owl_viewwin_init_fmtext(owl_viewwin *v, WINDOW *win, int winlines, int wincols, owl_fmtext *fmtext)
38{
39  owl_fmtext_copy(&(v->fmtext), fmtext);
40  v->textlines=owl_fmtext_num_lines(&(v->fmtext));
41  v->topline=0;
42  v->rightshift=0;
43  v->winlines=winlines;
44  v->wincols=wincols;
45  v->curswin=win;
46}
47
48void owl_viewwin_set_curswin(owl_viewwin *v, WINDOW *w, int winlines, int wincols)
49{
50  v->curswin=w;
51  v->winlines=winlines;
52  v->wincols=wincols;
53}
54
55void owl_viewwin_set_onclose_hook(owl_viewwin *v, void (*onclose_hook) (owl_viewwin *vwin, void *data), void *onclose_hook_data) {
56  v->onclose_hook = onclose_hook;
57  v->onclose_hook_data = onclose_hook_data;
58}
59
60/* regenerate text on the curses window. */
61/* if update == 1 then do a doupdate() */
62void owl_viewwin_redisplay(owl_viewwin *v, int update)
63{
64  owl_fmtext fm1, fm2;
65 
66  werase(v->curswin);
67  wmove(v->curswin, 0, 0);
68
69  owl_fmtext_init_null(&fm1);
70  owl_fmtext_init_null(&fm2);
71 
72  owl_fmtext_truncate_lines(&(v->fmtext), v->topline, v->winlines-BOTTOM_OFFSET, &fm1);
73  owl_fmtext_truncate_cols(&fm1, v->rightshift, v->wincols-1+v->rightshift, &fm2);
74
75  owl_fmtext_curs_waddstr(&fm2, v->curswin);
76
77  /* print the message at the bottom */
78  wmove(v->curswin, v->winlines-1, 0);
79  wattrset(v->curswin, A_REVERSE);
80  if (v->textlines - v->topline > v->winlines-BOTTOM_OFFSET) {
81    waddstr(v->curswin, "--More-- (Space to see more, 'q' to quit)");
82  } else {
83    waddstr(v->curswin, "--End-- (Press 'q' to quit)");
84  }
85  wattroff(v->curswin, A_REVERSE);
86  wnoutrefresh(v->curswin);
87
88  if (update==1) {
89    doupdate();
90  }
91
92  owl_fmtext_free(&fm1);
93  owl_fmtext_free(&fm2);
94}
95
96void owl_viewwin_pagedown(owl_viewwin *v)
97{
98  v->topline+=v->winlines - BOTTOM_OFFSET;
99  if ( (v->topline+v->winlines-BOTTOM_OFFSET) > v->textlines) {
100    v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
101  }
102}
103
104void owl_viewwin_linedown(owl_viewwin *v)
105{
106  v->topline++;
107  if ( (v->topline+v->winlines-BOTTOM_OFFSET) > v->textlines) {
108    v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
109  }
110}
111
112void owl_viewwin_pageup(owl_viewwin *v)
113{
114  v->topline-=v->winlines;
115  if (v->topline<0) v->topline=0;
116}
117
118void owl_viewwin_lineup(owl_viewwin *v)
119{
120  v->topline--;
121  if (v->topline<0) v->topline=0;
122}
123
124void owl_viewwin_right(owl_viewwin *v, int n)
125{
126  v->rightshift+=n;
127}
128
129void owl_viewwin_left(owl_viewwin *v, int n)
130{
131  v->rightshift-=n;
132  if (v->rightshift<0) v->rightshift=0;
133}
134
135void owl_viewwin_top(owl_viewwin *v)
136{
137  v->topline=0;
138  v->rightshift=0;
139}
140
141void owl_viewwin_bottom(owl_viewwin *v)
142{
143  v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
144}
145
146void owl_viewwin_free(owl_viewwin *v)
147{
148  if (v->onclose_hook) {
149    v->onclose_hook(v, v->onclose_hook_data);
150    v->onclose_hook = NULL;
151    v->onclose_hook_data = NULL;
152  }
153  owl_fmtext_free(&(v->fmtext));
154}
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