source: viewwin.c @ 3e55268

release-1.6release-1.7release-1.8release-1.9
Last change on this file since 3e55268 was 3e55268, checked in by Anders Kaseorg <andersk@mit.edu>, 11 years ago
owl_viewwin_init_fmtext: Don’t leak the temporary formatted text. Signed-off-by: Anders Kaseorg <andersk@mit.edu> Reviewed-by: Alejandro R. Sedeño <asedeno@mit.edu>
  • Property mode set to 100644
File size: 3.9 KB
RevLine 
[7d4fbcd]1#include <string.h>
2#include "owl.h"
3
4#define BOTTOM_OFFSET 1
5
[b2b0773]6/* initialize the viewwin e.  'win' is an already initialzed curses
7 * window that will be used by viewwin
8 */
[e19eb97]9void owl_viewwin_init_text(owl_viewwin *v, WINDOW *win, int winlines, int wincols, const char *text)
[b2b0773]10{
[7d4fbcd]11  owl_fmtext_init_null(&(v->fmtext));
12  if (text) {
13    owl_fmtext_append_normal(&(v->fmtext), text);
[4083c49]14    if (text[0] != '\0' && text[strlen(text) - 1] != '\n') {
[7d4fbcd]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;
[afbf668]24  v->onclose_hook = NULL;
25}
26
[e19eb97]27void owl_viewwin_append_text(owl_viewwin *v, const char *text) {
[afbf668]28    owl_fmtext_append_normal(&(v->fmtext), text);
29    v->textlines=owl_fmtext_num_lines(&(v->fmtext)); 
[7d4fbcd]30}
31
[b2b0773]32/* initialize the viewwin e.  'win' is an already initialzed curses
33 * window that will be used by viewwin
34 */
[075ba92]35void owl_viewwin_init_fmtext(owl_viewwin *v, WINDOW *win, int winlines, int wincols, const owl_fmtext *fmtext)
[b2b0773]36{
[dd6af02]37  char *text;
38
[7d4fbcd]39  owl_fmtext_copy(&(v->fmtext), fmtext);
[dd6af02]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  }
[3e55268]44  owl_free(text);
[7d4fbcd]45  v->textlines=owl_fmtext_num_lines(&(v->fmtext));
46  v->topline=0;
47  v->rightshift=0;
48  v->winlines=winlines;
49  v->wincols=wincols;
50  v->curswin=win;
51}
52
[b2b0773]53void owl_viewwin_set_curswin(owl_viewwin *v, WINDOW *w, int winlines, int wincols)
54{
[7d4fbcd]55  v->curswin=w;
56  v->winlines=winlines;
57  v->wincols=wincols;
58}
59
[afbf668]60void owl_viewwin_set_onclose_hook(owl_viewwin *v, void (*onclose_hook) (owl_viewwin *vwin, void *data), void *onclose_hook_data) {
61  v->onclose_hook = onclose_hook;
62  v->onclose_hook_data = onclose_hook_data;
63}
64
[b2b0773]65/* regenerate text on the curses window. */
66/* if update == 1 then do a doupdate() */
67void owl_viewwin_redisplay(owl_viewwin *v, int update)
68{
[7d4fbcd]69  owl_fmtext fm1, fm2;
70 
71  werase(v->curswin);
72  wmove(v->curswin, 0, 0);
73
[af2ca19]74  owl_fmtext_init_null(&fm1);
75  owl_fmtext_init_null(&fm2);
76 
[7d4fbcd]77  owl_fmtext_truncate_lines(&(v->fmtext), v->topline, v->winlines-BOTTOM_OFFSET, &fm1);
78  owl_fmtext_truncate_cols(&fm1, v->rightshift, v->wincols-1+v->rightshift, &fm2);
79
[47519e1b]80  owl_fmtext_curs_waddstr_without_search(&fm2, v->curswin);
[7d4fbcd]81
82  /* print the message at the bottom */
83  wmove(v->curswin, v->winlines-1, 0);
84  wattrset(v->curswin, A_REVERSE);
[3a2daac]85  if (v->textlines - v->topline > v->winlines-BOTTOM_OFFSET) {
[7d4fbcd]86    waddstr(v->curswin, "--More-- (Space to see more, 'q' to quit)");
87  } else {
88    waddstr(v->curswin, "--End-- (Press 'q' to quit)");
89  }
90  wattroff(v->curswin, A_REVERSE);
91  wnoutrefresh(v->curswin);
92
93  if (update==1) {
94    doupdate();
95  }
[af2ca19]96
97  owl_fmtext_free(&fm1);
98  owl_fmtext_free(&fm2);
[7d4fbcd]99}
100
[b2b0773]101void owl_viewwin_pagedown(owl_viewwin *v)
102{
[7d4fbcd]103  v->topline+=v->winlines - BOTTOM_OFFSET;
104  if ( (v->topline+v->winlines-BOTTOM_OFFSET) > v->textlines) {
105    v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
106  }
107}
108
[b2b0773]109void owl_viewwin_linedown(owl_viewwin *v)
110{
[7d4fbcd]111  v->topline++;
112  if ( (v->topline+v->winlines-BOTTOM_OFFSET) > v->textlines) {
113    v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
114  }
115}
116
[b2b0773]117void owl_viewwin_pageup(owl_viewwin *v)
118{
[7d4fbcd]119  v->topline-=v->winlines;
120  if (v->topline<0) v->topline=0;
121}
122
[b2b0773]123void owl_viewwin_lineup(owl_viewwin *v)
124{
[7d4fbcd]125  v->topline--;
126  if (v->topline<0) v->topline=0;
127}
128
[b2b0773]129void owl_viewwin_right(owl_viewwin *v, int n)
130{
[7d4fbcd]131  v->rightshift+=n;
132}
133
[b2b0773]134void owl_viewwin_left(owl_viewwin *v, int n)
135{
[7d4fbcd]136  v->rightshift-=n;
137  if (v->rightshift<0) v->rightshift=0;
138}
139
[b2b0773]140void owl_viewwin_top(owl_viewwin *v)
141{
[7d4fbcd]142  v->topline=0;
143  v->rightshift=0;
144}
145
[b2b0773]146void owl_viewwin_bottom(owl_viewwin *v)
147{
[7d4fbcd]148  v->topline = v->textlines - v->winlines + BOTTOM_OFFSET;
149}
150
[b2b0773]151void owl_viewwin_free(owl_viewwin *v)
152{
[afbf668]153  if (v->onclose_hook) {
154    v->onclose_hook(v, v->onclose_hook_data);
[8721756]155    v->onclose_hook = NULL;
156    v->onclose_hook_data = NULL;
[afbf668]157  }
[7d4fbcd]158  owl_fmtext_free(&(v->fmtext));
159}
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