1 | #include <string.h> |
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2 | #include "owl.h" |
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3 | |
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4 | #define BOTTOM_OFFSET 1 |
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5 | |
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6 | /* initialize the viewwin e. 'win' is an already initialzed curses |
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7 | * window that will be used by viewwin |
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8 | */ |
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9 | void owl_viewwin_init_text(owl_viewwin *v, WINDOW *win, int winlines, int wincols, const char *text) |
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10 | { |
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11 | owl_fmtext_init_null(&(v->fmtext)); |
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12 | if (text) { |
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13 | owl_fmtext_append_normal(&(v->fmtext), text); |
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14 | if (text[0] != '\0' && text[strlen(text) - 1] != '\n') { |
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15 | owl_fmtext_append_normal(&(v->fmtext), "\n"); |
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16 | } |
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17 | v->textlines=owl_fmtext_num_lines(&(v->fmtext)); |
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18 | } |
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19 | v->topline=0; |
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20 | v->rightshift=0; |
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21 | v->winlines=winlines; |
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22 | v->wincols=wincols; |
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23 | v->curswin=win; |
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24 | v->onclose_hook = NULL; |
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25 | } |
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26 | |
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27 | void owl_viewwin_append_text(owl_viewwin *v, const char *text) { |
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28 | owl_fmtext_append_normal(&(v->fmtext), text); |
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29 | v->textlines=owl_fmtext_num_lines(&(v->fmtext)); |
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30 | } |
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31 | |
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32 | /* initialize the viewwin e. 'win' is an already initialzed curses |
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33 | * window that will be used by viewwin |
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34 | */ |
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35 | void owl_viewwin_init_fmtext(owl_viewwin *v, WINDOW *win, int winlines, int wincols, const owl_fmtext *fmtext) |
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36 | { |
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37 | char *text; |
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38 | |
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39 | owl_fmtext_copy(&(v->fmtext), fmtext); |
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40 | text = owl_fmtext_print_plain(fmtext); |
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41 | if (text[0] != '\0' && text[strlen(text) - 1] != '\n') { |
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42 | owl_fmtext_append_normal(&(v->fmtext), "\n"); |
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43 | } |
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44 | owl_free(text); |
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45 | v->textlines=owl_fmtext_num_lines(&(v->fmtext)); |
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46 | v->topline=0; |
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47 | v->rightshift=0; |
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48 | v->winlines=winlines; |
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49 | v->wincols=wincols; |
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50 | v->curswin=win; |
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51 | } |
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52 | |
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53 | void owl_viewwin_set_curswin(owl_viewwin *v, WINDOW *w, int winlines, int wincols) |
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54 | { |
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55 | v->curswin=w; |
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56 | v->winlines=winlines; |
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57 | v->wincols=wincols; |
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58 | } |
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59 | |
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60 | void owl_viewwin_set_onclose_hook(owl_viewwin *v, void (*onclose_hook) (owl_viewwin *vwin, void *data), void *onclose_hook_data) { |
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61 | v->onclose_hook = onclose_hook; |
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62 | v->onclose_hook_data = onclose_hook_data; |
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63 | } |
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64 | |
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65 | /* regenerate text on the curses window. */ |
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66 | void owl_viewwin_redisplay(owl_viewwin *v) |
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67 | { |
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68 | owl_fmtext fm1, fm2; |
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69 | |
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70 | /* avoid segfault when screen too small to create curswin */ |
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71 | if (v->curswin == NULL) |
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72 | return; |
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73 | |
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74 | werase(v->curswin); |
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75 | wmove(v->curswin, 0, 0); |
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76 | |
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77 | owl_fmtext_init_null(&fm1); |
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78 | owl_fmtext_init_null(&fm2); |
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79 | |
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80 | owl_fmtext_truncate_lines(&(v->fmtext), v->topline, v->winlines-BOTTOM_OFFSET, &fm1); |
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81 | owl_fmtext_truncate_cols(&fm1, v->rightshift, v->wincols-1+v->rightshift, &fm2); |
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82 | |
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83 | owl_fmtext_curs_waddstr_without_search(&fm2, v->curswin); |
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84 | |
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85 | /* print the message at the bottom */ |
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86 | wmove(v->curswin, v->winlines-1, 0); |
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87 | wattrset(v->curswin, A_REVERSE); |
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88 | if (v->textlines - v->topline > v->winlines-BOTTOM_OFFSET) { |
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89 | waddstr(v->curswin, "--More-- (Space to see more, 'q' to quit)"); |
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90 | } else { |
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91 | waddstr(v->curswin, "--End-- (Press 'q' to quit)"); |
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92 | } |
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93 | wattroff(v->curswin, A_REVERSE); |
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94 | |
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95 | owl_fmtext_cleanup(&fm1); |
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96 | owl_fmtext_cleanup(&fm2); |
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97 | } |
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98 | |
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99 | void owl_viewwin_pagedown(owl_viewwin *v) |
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100 | { |
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101 | v->topline+=v->winlines - BOTTOM_OFFSET; |
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102 | if ( (v->topline+v->winlines-BOTTOM_OFFSET) > v->textlines) { |
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103 | v->topline = v->textlines - v->winlines + BOTTOM_OFFSET; |
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104 | } |
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105 | } |
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106 | |
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107 | void owl_viewwin_linedown(owl_viewwin *v) |
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108 | { |
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109 | v->topline++; |
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110 | if ( (v->topline+v->winlines-BOTTOM_OFFSET) > v->textlines) { |
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111 | v->topline = v->textlines - v->winlines + BOTTOM_OFFSET; |
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112 | } |
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113 | } |
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114 | |
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115 | void owl_viewwin_pageup(owl_viewwin *v) |
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116 | { |
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117 | v->topline-=v->winlines; |
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118 | if (v->topline<0) v->topline=0; |
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119 | } |
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120 | |
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121 | void owl_viewwin_lineup(owl_viewwin *v) |
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122 | { |
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123 | v->topline--; |
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124 | if (v->topline<0) v->topline=0; |
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125 | } |
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126 | |
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127 | void owl_viewwin_right(owl_viewwin *v, int n) |
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128 | { |
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129 | v->rightshift+=n; |
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130 | } |
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131 | |
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132 | void owl_viewwin_left(owl_viewwin *v, int n) |
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133 | { |
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134 | v->rightshift-=n; |
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135 | if (v->rightshift<0) v->rightshift=0; |
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136 | } |
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137 | |
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138 | void owl_viewwin_top(owl_viewwin *v) |
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139 | { |
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140 | v->topline=0; |
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141 | v->rightshift=0; |
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142 | } |
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143 | |
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144 | void owl_viewwin_bottom(owl_viewwin *v) |
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145 | { |
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146 | v->topline = v->textlines - v->winlines + BOTTOM_OFFSET; |
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147 | } |
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148 | |
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149 | void owl_viewwin_cleanup(owl_viewwin *v) |
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150 | { |
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151 | if (v->onclose_hook) { |
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152 | v->onclose_hook(v, v->onclose_hook_data); |
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153 | v->onclose_hook = NULL; |
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154 | v->onclose_hook_data = NULL; |
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155 | } |
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156 | owl_fmtext_cleanup(&(v->fmtext)); |
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157 | } |
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