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 | #define EMPTY_INDICATOR "~" |
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6 | |
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7 | static void owl_viewwin_redraw_content(owl_window *w, WINDOW *curswin, void *user_data); |
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8 | static void owl_viewwin_redraw_status(owl_window *w, WINDOW *curswin, void *user_data); |
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9 | static void owl_viewwin_layout(owl_viewwin *v); |
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10 | static void owl_viewwin_set_window(owl_viewwin *v, owl_window *w); |
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11 | |
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12 | /* Create a viewwin. 'win' is an already initialized owl_window that |
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13 | * will be used by the viewwin |
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14 | */ |
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15 | owl_viewwin *owl_viewwin_new_text(owl_window *win, const char *text) |
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16 | { |
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17 | owl_viewwin *v = owl_malloc(sizeof(owl_viewwin)); |
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18 | memset(v, 0, sizeof(*v)); |
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19 | owl_fmtext_init_null(&(v->fmtext)); |
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20 | if (text) { |
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21 | owl_fmtext_append_normal(&(v->fmtext), text); |
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22 | if (text[0] != '\0' && text[strlen(text) - 1] != '\n') { |
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23 | owl_fmtext_append_normal(&(v->fmtext), "\n"); |
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24 | } |
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25 | v->textlines=owl_fmtext_num_lines(&(v->fmtext)); |
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26 | } |
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27 | v->topline=0; |
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28 | v->rightshift=0; |
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29 | v->onclose_hook = NULL; |
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30 | |
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31 | owl_viewwin_set_window(v, win); |
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32 | return v; |
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33 | } |
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34 | |
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35 | /* Create a viewwin. 'win' is an already initialized owl_window that |
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36 | * will be used by the viewwin |
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37 | */ |
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38 | owl_viewwin *owl_viewwin_new_fmtext(owl_window *win, const owl_fmtext *fmtext) |
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39 | { |
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40 | char *text; |
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41 | owl_viewwin *v = owl_malloc(sizeof(owl_viewwin)); |
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42 | memset(v, 0, sizeof(*v)); |
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43 | |
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44 | owl_fmtext_copy(&(v->fmtext), fmtext); |
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45 | text = owl_fmtext_print_plain(fmtext); |
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46 | if (text[0] != '\0' && text[strlen(text) - 1] != '\n') { |
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47 | owl_fmtext_append_normal(&(v->fmtext), "\n"); |
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48 | } |
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49 | owl_free(text); |
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50 | v->textlines=owl_fmtext_num_lines(&(v->fmtext)); |
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51 | v->topline=0; |
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52 | v->rightshift=0; |
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53 | |
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54 | owl_viewwin_set_window(v, win); |
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55 | return v; |
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56 | } |
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57 | |
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58 | static void owl_viewwin_set_window(owl_viewwin *v, owl_window *w) |
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59 | { |
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60 | v->window = g_object_ref(w); |
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61 | v->content = owl_window_new(v->window); |
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62 | v->status = owl_window_new(v->window); |
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63 | |
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64 | v->sig_content_redraw_id = |
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65 | g_signal_connect(v->content, "redraw", G_CALLBACK(owl_viewwin_redraw_content), v); |
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66 | v->sig_status_redraw_id = |
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67 | g_signal_connect(v->status, "redraw", G_CALLBACK(owl_viewwin_redraw_status), v); |
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68 | v->sig_resize_id = |
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69 | g_signal_connect_swapped(v->window, "resized", G_CALLBACK(owl_viewwin_layout), v); |
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70 | owl_viewwin_layout(v); |
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71 | |
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72 | owl_window_show(v->content); |
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73 | owl_window_show(v->status); |
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74 | } |
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75 | |
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76 | 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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77 | v->onclose_hook = onclose_hook; |
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78 | v->onclose_hook_data = onclose_hook_data; |
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79 | } |
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80 | |
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81 | static void owl_viewwin_layout(owl_viewwin *v) |
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82 | { |
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83 | int lines, cols; |
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84 | owl_window_get_position(v->window, &lines, &cols, NULL, NULL); |
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85 | owl_window_set_position(v->content, lines - BOTTOM_OFFSET, cols, 0, 0); |
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86 | owl_window_set_position(v->status, BOTTOM_OFFSET, cols, lines - BOTTOM_OFFSET, 0); |
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87 | } |
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88 | |
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89 | /* regenerate text on the curses window. */ |
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90 | static void owl_viewwin_redraw_content(owl_window *w, WINDOW *curswin, void *user_data) |
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91 | { |
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92 | owl_fmtext fm1, fm2; |
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93 | owl_viewwin *v = user_data; |
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94 | int winlines, wincols; |
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95 | int y; |
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96 | |
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97 | owl_window_get_position(w, &winlines, &wincols, 0, 0); |
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98 | |
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99 | werase(curswin); |
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100 | wmove(curswin, 0, 0); |
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101 | |
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102 | owl_fmtext_init_null(&fm1); |
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103 | owl_fmtext_init_null(&fm2); |
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104 | |
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105 | owl_fmtext_truncate_lines(&(v->fmtext), v->topline, winlines, &fm1); |
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106 | owl_fmtext_truncate_cols(&fm1, v->rightshift, wincols-1+v->rightshift, &fm2); |
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107 | |
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108 | owl_fmtext_curs_waddstr(&fm2, curswin); |
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109 | |
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110 | /* Fill remaining lines with tildes. */ |
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111 | y = v->textlines - v->topline; |
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112 | wmove(curswin, y, 0); |
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113 | for (; y < winlines; y++) { |
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114 | waddstr(curswin, EMPTY_INDICATOR); |
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115 | waddstr(curswin, "\n"); |
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116 | } |
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117 | |
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118 | owl_fmtext_cleanup(&fm1); |
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119 | owl_fmtext_cleanup(&fm2); |
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120 | } |
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121 | |
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122 | static void owl_viewwin_redraw_status(owl_window *w, WINDOW *curswin, void *user_data) |
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123 | { |
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124 | owl_viewwin *v = user_data; |
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125 | int winlines, wincols; |
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126 | |
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127 | owl_window_get_position(v->content, &winlines, &wincols, 0, 0); |
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128 | |
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129 | werase(curswin); |
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130 | wmove(curswin, 0, 0); |
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131 | wattrset(curswin, A_REVERSE); |
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132 | if (v->textlines - v->topline > winlines) { |
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133 | waddstr(curswin, "--More-- (Space to see more, 'q' to quit)"); |
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134 | } else { |
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135 | waddstr(curswin, "--End-- (Press 'q' to quit)"); |
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136 | } |
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137 | wattroff(curswin, A_REVERSE); |
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138 | } |
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139 | |
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140 | void owl_viewwin_append_text(owl_viewwin *v, const char *text) { |
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141 | owl_fmtext_append_normal(&(v->fmtext), text); |
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142 | v->textlines=owl_fmtext_num_lines(&(v->fmtext)); |
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143 | owl_viewwin_dirty(v); |
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144 | } |
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145 | |
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146 | /* Schedule a redraw of 'v'. Exported for hooking into the search |
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147 | string; when we have some way of listening for changes, this can be |
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148 | removed. */ |
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149 | void owl_viewwin_dirty(owl_viewwin *v) |
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150 | { |
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151 | owl_window_dirty(v->content); |
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152 | owl_window_dirty(v->status); |
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153 | } |
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154 | |
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155 | void owl_viewwin_down(owl_viewwin *v, int amount) { |
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156 | int winlines; |
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157 | owl_window_get_position(v->content, &winlines, 0, 0, 0); |
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158 | /* Don't scroll past the bottom. */ |
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159 | amount = MIN(amount, v->textlines - (v->topline + winlines)); |
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160 | /* But if we're already past the bottom, don't back up either. */ |
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161 | if (amount > 0) { |
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162 | v->topline += amount; |
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163 | owl_viewwin_dirty(v); |
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164 | } |
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165 | } |
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166 | |
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167 | void owl_viewwin_up(owl_viewwin *v, int amount) |
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168 | { |
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169 | v->topline -= amount; |
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170 | if (v->topline<0) v->topline=0; |
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171 | owl_viewwin_dirty(v); |
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172 | } |
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173 | |
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174 | void owl_viewwin_pagedown(owl_viewwin *v) |
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175 | { |
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176 | int winlines; |
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177 | owl_window_get_position(v->content, &winlines, 0, 0, 0); |
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178 | owl_viewwin_down(v, winlines); |
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179 | } |
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180 | |
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181 | void owl_viewwin_linedown(owl_viewwin *v) |
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182 | { |
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183 | owl_viewwin_down(v, 1); |
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184 | } |
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185 | |
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186 | void owl_viewwin_pageup(owl_viewwin *v) |
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187 | { |
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188 | int winlines; |
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189 | owl_window_get_position(v->content, &winlines, 0, 0, 0); |
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190 | owl_viewwin_up(v, winlines); |
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191 | } |
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192 | |
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193 | void owl_viewwin_lineup(owl_viewwin *v) |
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194 | { |
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195 | owl_viewwin_up(v, 1); |
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196 | } |
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197 | |
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198 | void owl_viewwin_right(owl_viewwin *v, int n) |
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199 | { |
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200 | v->rightshift+=n; |
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201 | owl_viewwin_dirty(v); |
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202 | } |
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203 | |
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204 | void owl_viewwin_left(owl_viewwin *v, int n) |
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205 | { |
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206 | v->rightshift-=n; |
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207 | if (v->rightshift<0) v->rightshift=0; |
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208 | owl_viewwin_dirty(v); |
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209 | } |
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210 | |
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211 | void owl_viewwin_top(owl_viewwin *v) |
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212 | { |
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213 | v->topline=0; |
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214 | v->rightshift=0; |
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215 | owl_viewwin_dirty(v); |
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216 | } |
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217 | |
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218 | void owl_viewwin_bottom(owl_viewwin *v) |
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219 | { |
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220 | int winlines; |
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221 | owl_window_get_position(v->content, &winlines, 0, 0, 0); |
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222 | v->topline = v->textlines - winlines; |
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223 | owl_viewwin_dirty(v); |
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224 | } |
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225 | |
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226 | /* Scroll in 'direction' to the next line containing 're' in 'v', |
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227 | * starting from the current line. Returns 0 if no occurrence is |
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228 | * found. |
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229 | * |
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230 | * If mode==0 then stay on the current line if it matches. |
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231 | */ |
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232 | int owl_viewwin_search(owl_viewwin *v, const owl_regex *re, int mode, int direction) |
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233 | { |
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234 | int start, end, offset; |
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235 | owl_fmtext_line_extents(&v->fmtext, v->topline, &start, &end); |
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236 | if (direction == OWL_DIRECTION_DOWNWARDS) { |
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237 | offset = owl_fmtext_search(&v->fmtext, re, mode ? end : start); |
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238 | if (offset < 0) |
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239 | return 0; |
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240 | v->topline = owl_fmtext_line_number(&v->fmtext, offset); |
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241 | owl_viewwin_dirty(v); |
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242 | return 1; |
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243 | } else { |
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244 | /* FIXME */ |
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245 | owl_function_error("Upwards searching is not implemented in viewwin."); |
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246 | return 1; |
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247 | } |
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248 | } |
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249 | |
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250 | void owl_viewwin_delete(owl_viewwin *v) |
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251 | { |
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252 | if (v->onclose_hook) { |
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253 | v->onclose_hook(v, v->onclose_hook_data); |
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254 | v->onclose_hook = NULL; |
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255 | v->onclose_hook_data = NULL; |
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256 | } |
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257 | /* TODO: This is far too tedious. owl_viewwin should own v->window |
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258 | * and just unlink it in one go. Signals should also go away for |
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259 | * free. */ |
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260 | g_signal_handler_disconnect(v->window, v->sig_resize_id); |
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261 | g_signal_handler_disconnect(v->content, v->sig_content_redraw_id); |
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262 | g_signal_handler_disconnect(v->status, v->sig_status_redraw_id); |
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263 | owl_window_unlink(v->content); |
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264 | owl_window_unlink(v->status); |
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265 | g_object_unref(v->window); |
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266 | g_object_unref(v->content); |
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267 | g_object_unref(v->status); |
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268 | owl_fmtext_cleanup(&(v->fmtext)); |
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269 | owl_free(v); |
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270 | } |
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