1 | #include "owl.h" |
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2 | #include <stdlib.h> |
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3 | #include <unistd.h> |
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4 | #include <string.h> |
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5 | #include <ctype.h> |
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6 | |
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7 | static const char fileIdent[] = "$Id$"; |
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8 | |
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9 | #define INCR 5000 |
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10 | |
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11 | /* initialize the editwin e. |
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12 | * 'win' is an already initialzed curses window that will be used by editwin |
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13 | */ |
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14 | void owl_editwin_init(owl_editwin *e, WINDOW *win, int winlines, int wincols, int style, owl_history *hist) |
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15 | { |
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16 | e->buff=owl_malloc(INCR); |
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17 | e->buff[0]='\0'; |
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18 | e->bufflen=0; |
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19 | e->hist=hist; |
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20 | e->allocated=INCR; |
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21 | e->buffx=0; |
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22 | e->buffy=0; |
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23 | e->topline=0; |
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24 | e->winlines=winlines; |
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25 | e->wincols=wincols; |
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26 | e->fillcol=owl_editwin_limit_maxcols(wincols-7, owl_global_get_edit_maxfillcols(&g)); |
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27 | e->wrapcol=owl_editwin_limit_maxcols(wincols-7, owl_global_get_edit_maxwrapcols(&g)); |
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28 | e->curswin=win; |
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29 | e->style=style; |
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30 | if ((style!=OWL_EDITWIN_STYLE_MULTILINE) && |
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31 | (style!=OWL_EDITWIN_STYLE_ONELINE)) { |
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32 | e->style=OWL_EDITWIN_STYLE_MULTILINE; |
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33 | } |
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34 | e->lock=0; |
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35 | e->dotsend=0; |
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36 | e->echochar='\0'; |
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37 | |
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38 | /* |
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39 | // We get initialized multiple times, but we need to hold on to |
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40 | // the callbacks, so we can't NULL them here. |
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41 | e->command = NULL; |
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42 | e->callback = NULL; |
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43 | e->cbdata = NULL; |
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44 | */ |
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45 | if (win) werase(win); |
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46 | } |
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47 | |
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48 | void owl_editwin_set_curswin(owl_editwin *e, WINDOW *w, int winlines, int wincols) |
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49 | { |
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50 | e->curswin=w; |
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51 | e->winlines=winlines; |
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52 | e->wincols=wincols; |
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53 | e->fillcol=owl_editwin_limit_maxcols(wincols-7, owl_global_get_edit_maxfillcols(&g)); |
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54 | e->wrapcol=owl_editwin_limit_maxcols(wincols-7, owl_global_get_edit_maxwrapcols(&g)); |
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55 | } |
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56 | |
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57 | /* echo the character 'ch' for each normal character keystroke, |
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58 | * excepting locktext. This is useful for entering passwords etc. If |
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59 | * ch=='\0' characters are echo'd normally |
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60 | */ |
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61 | void owl_editwin_set_echochar(owl_editwin *e, int ch) |
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62 | { |
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63 | e->echochar=ch; |
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64 | } |
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65 | |
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66 | WINDOW *owl_editwin_get_curswin(owl_editwin *e) |
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67 | { |
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68 | return(e->curswin); |
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69 | } |
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70 | |
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71 | void owl_editwin_set_history(owl_editwin *e, owl_history *h) |
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72 | { |
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73 | e->hist=h; |
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74 | } |
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75 | |
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76 | owl_history *owl_editwin_get_history(owl_editwin *e) |
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77 | { |
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78 | return(e->hist); |
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79 | } |
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80 | |
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81 | void owl_editwin_set_dotsend(owl_editwin *e) |
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82 | { |
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83 | e->dotsend=1; |
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84 | } |
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85 | |
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86 | void owl_editwin_set_command(owl_editwin *e, char *command) { |
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87 | if(e->command) owl_free(e->command); |
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88 | e->command = owl_strdup(command); |
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89 | } |
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90 | |
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91 | char *owl_editwin_get_command(owl_editwin *e) { |
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92 | if(e->command) return e->command; |
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93 | return ""; |
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94 | } |
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95 | |
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96 | void owl_editwin_set_callback(owl_editwin *e, void (*cb)(owl_editwin*)) { |
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97 | e->callback = cb; |
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98 | } |
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99 | |
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100 | void (*owl_editwin_get_callback(owl_editwin *e))(owl_editwin*) { |
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101 | return e->callback; |
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102 | } |
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103 | |
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104 | void owl_editwin_set_cbdata(owl_editwin *e, void *data) { |
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105 | e->cbdata = data; |
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106 | } |
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107 | |
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108 | void* owl_editwin_get_cbdata(owl_editwin *e) { |
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109 | return e->cbdata; |
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110 | } |
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111 | |
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112 | void owl_editwin_do_callback(owl_editwin *e) { |
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113 | void (*cb)(owl_editwin*); |
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114 | cb=owl_editwin_get_callback(e); |
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115 | if(!cb) { |
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116 | owl_function_error("Internal error: No editwin callback!"); |
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117 | } else { |
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118 | // owl_function_error("text: |%s|", owl_editwin_get_text(e)); |
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119 | cb(e); |
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120 | } |
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121 | } |
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122 | |
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123 | int owl_editwin_limit_maxcols(int v, int maxv) |
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124 | { |
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125 | if (maxv > 5 && v > maxv) { |
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126 | return(maxv); |
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127 | } else { |
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128 | return(v); |
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129 | } |
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130 | } |
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131 | |
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132 | /* set text to be 'locked in' at the beginning of the buffer, any |
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133 | * previous text (including locked text) will be overwritten |
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134 | */ |
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135 | void owl_editwin_set_locktext(owl_editwin *e, char *text) |
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136 | { |
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137 | |
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138 | int x, y; |
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139 | |
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140 | x=e->buffx; |
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141 | y=e->buffy; |
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142 | e->buffx=0; |
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143 | e->buffy=0; |
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144 | owl_editwin_overwrite_string(e, text); |
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145 | e->lock=strlen(text); |
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146 | /* if (text[e->lock-1]=='\n') e->lock--; */ |
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147 | e->buffx=x; |
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148 | e->buffy=y; |
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149 | owl_editwin_adjust_for_locktext(e); |
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150 | owl_editwin_redisplay(e, 0); |
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151 | } |
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152 | |
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153 | int owl_editwin_get_style(owl_editwin *e) |
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154 | { |
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155 | return(e->style); |
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156 | } |
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157 | |
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158 | void owl_editwin_new_style(owl_editwin *e, int newstyle, owl_history *h) |
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159 | { |
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160 | char *ptr; |
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161 | |
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162 | owl_editwin_set_history(e, h); |
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163 | if (e->style==newstyle) return; |
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164 | |
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165 | if (newstyle==OWL_EDITWIN_STYLE_MULTILINE) { |
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166 | e->style=newstyle; |
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167 | } else if (newstyle==OWL_EDITWIN_STYLE_ONELINE) { |
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168 | e->style=newstyle; |
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169 | |
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170 | /* nuke everything after the first line */ |
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171 | if (e->bufflen > 0) { |
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172 | ptr=strchr(e->buff, '\n')-1; |
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173 | if (ptr) { |
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174 | e->bufflen=ptr - e->buff; |
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175 | e->buff[e->bufflen]='\0'; |
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176 | e->buffx=0; |
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177 | e->buffy=0; |
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178 | } |
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179 | } |
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180 | } |
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181 | } |
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182 | |
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183 | /* completly reinitialize the buffer */ |
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184 | void owl_editwin_fullclear(owl_editwin *e) |
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185 | { |
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186 | owl_free(e->buff); |
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187 | owl_editwin_init(e, e->curswin, e->winlines, e->wincols, e->style, e->hist); |
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188 | } |
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189 | |
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190 | /* clear all text except for locktext and put the cursor at the |
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191 | * beginning |
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192 | */ |
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193 | void owl_editwin_clear(owl_editwin *e) |
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194 | { |
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195 | |
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196 | int lock; |
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197 | int dotsend=e->dotsend; |
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198 | char *locktext=NULL; |
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199 | |
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200 | lock=0; |
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201 | if (e->lock > 0) { |
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202 | lock=1; |
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203 | |
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204 | locktext=owl_malloc(e->lock+20); |
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205 | strncpy(locktext, e->buff, e->lock); |
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206 | locktext[e->lock]='\0'; |
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207 | } |
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208 | |
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209 | owl_free(e->buff); |
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210 | owl_editwin_init(e, e->curswin, e->winlines, e->wincols, e->style, e->hist); |
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211 | |
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212 | if (lock > 0) { |
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213 | owl_editwin_set_locktext(e, locktext); |
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214 | } |
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215 | if (dotsend) { |
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216 | owl_editwin_set_dotsend(e); |
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217 | } |
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218 | |
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219 | if (locktext) owl_free(locktext); |
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220 | owl_editwin_adjust_for_locktext(e); |
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221 | } |
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222 | |
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223 | /* malloc more space for the buffer */ |
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224 | void _owl_editwin_addspace(owl_editwin *e) |
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225 | { |
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226 | e->buff=owl_realloc(e->buff, e->allocated+INCR); |
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227 | if (!e->buff) { |
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228 | /* error */ |
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229 | return; |
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230 | } |
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231 | e->allocated+=INCR; |
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232 | } |
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233 | |
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234 | void owl_editwin_recenter(owl_editwin *e) |
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235 | { |
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236 | e->topline=e->buffy-(e->winlines/2); |
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237 | if (e->topline<0) e->topline=0; |
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238 | if (e->topline>owl_editwin_get_numlines(e)) e->topline=owl_editwin_get_numlines(e); |
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239 | } |
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240 | |
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241 | /* regenerate the text on the curses window */ |
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242 | /* if update == 1 then do a doupdate(), otherwise do not */ |
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243 | void owl_editwin_redisplay(owl_editwin *e, int update) |
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244 | { |
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245 | |
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246 | char *ptr1, *ptr2, *ptr3, *buff; |
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247 | int i; |
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248 | |
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249 | werase(e->curswin); |
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250 | wmove(e->curswin, 0, 0); |
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251 | |
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252 | /* start at topline */ |
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253 | ptr1=e->buff; |
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254 | for (i=0; i<e->topline; i++) { |
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255 | ptr2=strchr(ptr1, '\n'); |
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256 | if (!ptr2) { |
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257 | /* we're already on the last line */ |
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258 | break; |
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259 | } |
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260 | ptr1=ptr2+1; |
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261 | } |
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262 | /* ptr1 now stores the starting point */ |
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263 | |
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264 | /* find the ending point and store it in ptr3 */ |
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265 | ptr2=ptr1; |
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266 | ptr3=ptr1; |
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267 | for (i=0; i<e->winlines; i++) { |
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268 | ptr3=strchr(ptr2, '\n'); |
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269 | if (!ptr3) { |
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270 | /* we've hit the last line */ |
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271 | /* print everything to the end */ |
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272 | ptr3=e->buff+e->bufflen-1; |
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273 | ptr3--; |
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274 | break; |
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275 | } |
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276 | ptr2=ptr3+1; |
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277 | } |
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278 | ptr3+=2; |
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279 | |
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280 | buff=owl_malloc(ptr3-ptr1+50); |
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281 | strncpy(buff, ptr1, ptr3-ptr1); |
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282 | buff[ptr3-ptr1]='\0'; |
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283 | if (e->echochar=='\0') { |
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284 | waddstr(e->curswin, buff); |
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285 | } else { |
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286 | /* translate to echochar, *except* for the locktext */ |
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287 | int len; |
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288 | int dolocklen=e->lock-(ptr1-e->buff); |
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289 | |
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290 | for (i=0; i<dolocklen; i++) { |
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291 | waddch(e->curswin, buff[i]); |
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292 | } |
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293 | len=strlen(buff); |
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294 | for (i=0; i<len-dolocklen; i++) { |
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295 | waddch(e->curswin, e->echochar); |
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296 | } |
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297 | } |
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298 | wmove(e->curswin, e->buffy-e->topline, e->buffx); |
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299 | wnoutrefresh(e->curswin); |
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300 | if (update==1) { |
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301 | doupdate(); |
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302 | } |
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303 | owl_free(buff); |
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304 | } |
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305 | |
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306 | |
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307 | /* linewrap the word just before the cursor. |
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308 | * returns 0 on success |
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309 | * returns -1 if we could not wrap. |
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310 | */ |
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311 | int _owl_editwin_linewrap_word(owl_editwin *e) |
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312 | { |
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313 | int i, z; |
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314 | |
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315 | z=_owl_editwin_get_index_from_xy(e); |
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316 | /* move back and line wrap the previous word */ |
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317 | for (i=z-1; ; i--) { |
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318 | /* move back until you find a space or hit the beginning of the line */ |
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319 | if (e->buff[i]==' ') { |
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320 | /* replace the space with a newline */ |
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321 | e->buff[i]='\n'; |
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322 | e->buffy++; |
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323 | e->buffx=z-i-1; |
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324 | /* were we on the last line */ |
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325 | return(0); |
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326 | } else if (e->buff[i]=='\n' || i<=e->lock) { |
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327 | /* we hit the begginning of the line or the buffer, we cannot |
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328 | * wrap. |
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329 | */ |
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330 | return(-1); |
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331 | } |
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332 | } |
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333 | } |
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334 | |
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335 | /* insert a character at the current point (shift later |
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336 | * characters over) |
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337 | */ |
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338 | void owl_editwin_insert_char(owl_editwin *e, char c) |
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339 | { |
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340 | |
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341 | int z, i, ret; |
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342 | |
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343 | /* \r is \n */ |
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344 | if (c=='\r') { |
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345 | c='\n'; |
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346 | } |
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347 | |
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348 | if (c=='\n' && e->style==OWL_EDITWIN_STYLE_ONELINE) { |
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349 | /* perhaps later this will change some state that allows the string |
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350 | to be read */ |
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351 | return; |
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352 | } |
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353 | |
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354 | /* make sure there is enough memory for the new text */ |
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355 | if ((e->bufflen+1) > (e->allocated-5)) { |
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356 | _owl_editwin_addspace(e); |
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357 | } |
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358 | |
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359 | /* get the insertion point */ |
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360 | z=_owl_editwin_get_index_from_xy(e); |
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361 | |
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362 | /* If we're going to insert at the last column do word wrapping, unless it's a \n */ |
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363 | if ((e->buffx+1==e->wrapcol) && (c!='\n')) { |
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364 | ret=_owl_editwin_linewrap_word(e); |
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365 | if (ret==-1) { |
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366 | /* we couldn't wrap, insert a hard newline instead */ |
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367 | owl_editwin_insert_char(e, '\n'); |
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368 | } |
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369 | } |
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370 | |
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371 | z=_owl_editwin_get_index_from_xy(e); |
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372 | /* shift all the other characters right */ |
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373 | for (i=e->bufflen; i>z; i--) { |
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374 | e->buff[i]=e->buff[i-1]; |
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375 | } |
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376 | |
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377 | /* insert the new one */ |
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378 | e->buff[z]=c; |
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379 | |
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380 | /* housekeeping */ |
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381 | e->bufflen++; |
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382 | e->buff[e->bufflen]='\0'; |
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383 | |
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384 | /* advance the cursor */ |
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385 | if (c=='\n') { |
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386 | e->buffx=0; |
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387 | e->buffy++; |
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388 | } else { |
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389 | e->buffx++; |
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390 | } |
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391 | } |
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392 | |
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393 | /* overwrite the character at the current point with 'c' */ |
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394 | void owl_editwin_overwrite_char(owl_editwin *e, char c) |
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395 | { |
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396 | int z; |
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397 | |
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398 | /* \r is \n */ |
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399 | if (c=='\r') { |
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400 | c='\n'; |
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401 | } |
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402 | |
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403 | if (c=='\n' && e->style==OWL_EDITWIN_STYLE_ONELINE) { |
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404 | /* perhaps later this will change some state that allows the string |
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405 | to be read */ |
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406 | return; |
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407 | } |
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408 | |
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409 | z=_owl_editwin_get_index_from_xy(e); |
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410 | |
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411 | /* only if we are at the end of the buffer do we create new space */ |
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412 | if (z==e->bufflen) { |
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413 | if ((e->bufflen+1) > (e->allocated-5)) { |
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414 | _owl_editwin_addspace(e); |
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415 | } |
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416 | } |
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417 | |
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418 | e->buff[z]=c; |
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419 | |
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420 | /* housekeeping if we are at the end of the buffer */ |
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421 | if (z==e->bufflen) { |
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422 | e->bufflen++; |
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423 | e->buff[e->bufflen]='\0'; |
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424 | } |
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425 | |
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426 | /* advance the cursor */ |
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427 | if (c=='\n') { |
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428 | e->buffx=0; |
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429 | e->buffy++; |
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430 | } else { |
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431 | e->buffx++; |
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432 | } |
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433 | |
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434 | } |
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435 | |
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436 | /* delete the character at the current point, following chars |
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437 | * shift left. |
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438 | */ |
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439 | void owl_editwin_delete_char(owl_editwin *e) |
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440 | { |
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441 | int z, i; |
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442 | |
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443 | if (e->bufflen==0) return; |
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444 | |
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445 | /* get the deletion point */ |
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446 | z=_owl_editwin_get_index_from_xy(e); |
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447 | |
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448 | if (z==e->bufflen) return; |
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449 | |
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450 | for (i=z; i<e->bufflen; i++) { |
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451 | e->buff[i]=e->buff[i+1]; |
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452 | } |
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453 | e->bufflen--; |
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454 | e->buff[e->bufflen]='\0'; |
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455 | } |
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456 | |
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457 | /* Swap the character at point with the character at point-1 and |
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458 | * advance the pointer. If point is at beginning of buffer do |
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459 | * nothing. If point is after the last character swap point-1 with |
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460 | * point-2. (Behaves as observed in tcsh and emacs). |
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461 | */ |
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462 | void owl_editwin_transpose_chars(owl_editwin *e) |
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463 | { |
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464 | int z; |
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465 | char tmp; |
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466 | |
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467 | if (e->bufflen==0) return; |
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468 | |
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469 | /* get the cursor point */ |
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470 | z=_owl_editwin_get_index_from_xy(e); |
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471 | |
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472 | if (z==e->bufflen) { |
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473 | /* point is after last character */ |
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474 | z--; |
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475 | } |
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476 | |
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477 | if (z-1 < e->lock) { |
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478 | /* point is at beginning of buffer, do nothing */ |
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479 | return; |
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480 | } |
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481 | |
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482 | tmp=e->buff[z]; |
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483 | e->buff[z]=e->buff[z-1]; |
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484 | e->buff[z-1]=tmp; |
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485 | owl_editwin_key_right(e); |
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486 | } |
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487 | |
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488 | /* insert 'string' at the current point, later text is shifted |
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489 | * right |
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490 | */ |
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491 | void owl_editwin_insert_string(owl_editwin *e, char *string) |
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492 | { |
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493 | int i, j; |
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494 | |
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495 | j=strlen(string); |
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496 | for (i=0; i<j; i++) { |
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497 | owl_editwin_insert_char(e, string[i]); |
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498 | } |
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499 | } |
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500 | |
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501 | /* write 'string' at the current point, overwriting text that is |
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502 | * already there |
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503 | */ |
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504 | |
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505 | void owl_editwin_overwrite_string(owl_editwin *e, char *string) |
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506 | { |
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507 | int i, j; |
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508 | |
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509 | j=strlen(string); |
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510 | for (i=0; i<j; i++) { |
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511 | owl_editwin_overwrite_char(e, string[i]); |
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512 | } |
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513 | } |
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514 | |
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515 | /* get the index into e->buff for the current cursor |
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516 | * position. |
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517 | */ |
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518 | int _owl_editwin_get_index_from_xy(owl_editwin *e) |
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519 | { |
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520 | int i; |
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521 | char *ptr1, *ptr2; |
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522 | |
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523 | if (e->bufflen==0) return(0); |
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524 | |
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525 | /* first go to the yth line */ |
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526 | ptr1=e->buff; |
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527 | for (i=0; i<e->buffy; i++) { |
---|
528 | ptr2=strchr(ptr1, '\n'); |
---|
529 | if (!ptr2) { |
---|
530 | /* we're already on the last line */ |
---|
531 | break; |
---|
532 | } |
---|
533 | ptr1=ptr2+1; |
---|
534 | } |
---|
535 | |
---|
536 | /* now go to the xth character */ |
---|
537 | ptr2=strchr(ptr1, '\n'); |
---|
538 | if (!ptr2) { |
---|
539 | ptr2=e->buff+e->bufflen; |
---|
540 | } |
---|
541 | |
---|
542 | if ((ptr2-ptr1) < e->buffx) { |
---|
543 | ptr1=ptr2-1; |
---|
544 | } else { |
---|
545 | ptr1+=e->buffx; |
---|
546 | } |
---|
547 | |
---|
548 | /* printf("DEBUG: index is %i\r\n", ptr1-e->buff); */ |
---|
549 | return(ptr1-e->buff); |
---|
550 | } |
---|
551 | |
---|
552 | void _owl_editwin_set_xy_by_index(owl_editwin *e, int index) |
---|
553 | { |
---|
554 | int z, i; |
---|
555 | |
---|
556 | z=_owl_editwin_get_index_from_xy(e); |
---|
557 | if (index>z) { |
---|
558 | for (i=0; i<index-z; i++) { |
---|
559 | owl_editwin_key_right(e); |
---|
560 | } |
---|
561 | } else if (index<z) { |
---|
562 | for (i=0; i<z-index; i++) { |
---|
563 | owl_editwin_key_left(e); |
---|
564 | } |
---|
565 | } |
---|
566 | } |
---|
567 | |
---|
568 | void owl_editwin_adjust_for_locktext(owl_editwin *e) |
---|
569 | { |
---|
570 | /* if we happen to have the cursor over locked text |
---|
571 | * move it to be out of the locktext region */ |
---|
572 | if (_owl_editwin_get_index_from_xy(e)<e->lock) { |
---|
573 | _owl_editwin_set_xy_by_index(e, e->lock); |
---|
574 | } |
---|
575 | } |
---|
576 | |
---|
577 | void owl_editwin_backspace(owl_editwin *e) |
---|
578 | { |
---|
579 | /* delete the char before the current one |
---|
580 | * and shift later chars left |
---|
581 | */ |
---|
582 | if (_owl_editwin_get_index_from_xy(e) > e->lock) { |
---|
583 | owl_editwin_key_left(e); |
---|
584 | owl_editwin_delete_char(e); |
---|
585 | } |
---|
586 | owl_editwin_adjust_for_locktext(e); |
---|
587 | } |
---|
588 | |
---|
589 | void owl_editwin_key_up(owl_editwin *e) |
---|
590 | { |
---|
591 | if (e->buffy > 0) e->buffy--; |
---|
592 | if (e->buffx >= owl_editwin_get_numchars_on_line(e, e->buffy)) { |
---|
593 | e->buffx=owl_editwin_get_numchars_on_line(e, e->buffy); |
---|
594 | } |
---|
595 | |
---|
596 | /* do we need to scroll? */ |
---|
597 | if (e->buffy-e->topline < 0) { |
---|
598 | e->topline-=e->winlines/2; |
---|
599 | } |
---|
600 | |
---|
601 | owl_editwin_adjust_for_locktext(e); |
---|
602 | } |
---|
603 | |
---|
604 | void owl_editwin_key_down(owl_editwin *e) |
---|
605 | { |
---|
606 | /* move down if we can */ |
---|
607 | if (e->buffy+1 < owl_editwin_get_numlines(e)) e->buffy++; |
---|
608 | |
---|
609 | /* if we're past the last character move back */ |
---|
610 | if (e->buffx >= owl_editwin_get_numchars_on_line(e, e->buffy)) { |
---|
611 | e->buffx=owl_editwin_get_numchars_on_line(e, e->buffy); |
---|
612 | } |
---|
613 | |
---|
614 | /* do we need to scroll? */ |
---|
615 | if (e->buffy-e->topline > e->winlines) { |
---|
616 | e->topline+=e->winlines/2; |
---|
617 | } |
---|
618 | |
---|
619 | /* adjust for locktext */ |
---|
620 | owl_editwin_adjust_for_locktext(e); |
---|
621 | } |
---|
622 | |
---|
623 | void owl_editwin_key_left(owl_editwin *e) |
---|
624 | { |
---|
625 | /* move left if we can, and maybe up a line */ |
---|
626 | if (e->buffx>0) { |
---|
627 | e->buffx--; |
---|
628 | } else if (e->buffy>0) { |
---|
629 | e->buffy--; |
---|
630 | e->buffx=owl_editwin_get_numchars_on_line(e, e->buffy); |
---|
631 | } |
---|
632 | |
---|
633 | /* do we need to scroll up? */ |
---|
634 | if (e->buffy-e->topline < 0) { |
---|
635 | e->topline-=e->winlines/2; |
---|
636 | } |
---|
637 | |
---|
638 | /* make sure to avoid locktext */ |
---|
639 | owl_editwin_adjust_for_locktext(e); |
---|
640 | } |
---|
641 | |
---|
642 | void owl_editwin_key_right(owl_editwin *e) |
---|
643 | { |
---|
644 | int i; |
---|
645 | |
---|
646 | /* move right if we can, and skip down a line if needed */ |
---|
647 | i=owl_editwin_get_numchars_on_line(e, e->buffy); |
---|
648 | if (e->buffx < i) { |
---|
649 | e->buffx++; |
---|
650 | /* } else if (e->buffy+1 < owl_editwin_get_numlines(e)) { */ |
---|
651 | } else if (_owl_editwin_get_index_from_xy(e) < e->bufflen) { |
---|
652 | if (e->style==OWL_EDITWIN_STYLE_MULTILINE) { |
---|
653 | e->buffx=0; |
---|
654 | e->buffy++; |
---|
655 | } |
---|
656 | } |
---|
657 | |
---|
658 | /* do we need to scroll down? */ |
---|
659 | if (e->buffy-e->topline >= e->winlines) { |
---|
660 | e->topline+=e->winlines/2; |
---|
661 | } |
---|
662 | } |
---|
663 | |
---|
664 | void owl_editwin_move_to_nextword(owl_editwin *e) |
---|
665 | { |
---|
666 | int i, x; |
---|
667 | |
---|
668 | /* if we're starting on a space, find the first non-space */ |
---|
669 | i=_owl_editwin_get_index_from_xy(e); |
---|
670 | if (e->buff[i]==' ') { |
---|
671 | for (x=i; x<e->bufflen; x++) { |
---|
672 | if (e->buff[x]!=' ' && e->buff[x]!='\n') { |
---|
673 | _owl_editwin_set_xy_by_index(e, x); |
---|
674 | break; |
---|
675 | } |
---|
676 | } |
---|
677 | } |
---|
678 | |
---|
679 | /* find the next space, newline or end of line and go there, if |
---|
680 | already at the end of the line, continue on to the next */ |
---|
681 | i=owl_editwin_get_numchars_on_line(e, e->buffy); |
---|
682 | if (e->buffx < i) { |
---|
683 | /* move right till end of line */ |
---|
684 | while (e->buffx < i) { |
---|
685 | e->buffx++; |
---|
686 | if (e->buff[_owl_editwin_get_index_from_xy(e)]==' ') return; |
---|
687 | if (e->buffx == i) return; |
---|
688 | } |
---|
689 | } else if (e->buffx == i) { |
---|
690 | /* try to move down */ |
---|
691 | if (e->style==OWL_EDITWIN_STYLE_MULTILINE) { |
---|
692 | if (e->buffy+1 < owl_editwin_get_numlines(e)) { |
---|
693 | e->buffx=0; |
---|
694 | e->buffy++; |
---|
695 | owl_editwin_move_to_nextword(e); |
---|
696 | } |
---|
697 | } |
---|
698 | } |
---|
699 | } |
---|
700 | |
---|
701 | /* go backwards to the last non-space character |
---|
702 | */ |
---|
703 | void owl_editwin_move_to_previousword(owl_editwin *e) |
---|
704 | { |
---|
705 | int i, x; |
---|
706 | |
---|
707 | /* are we already at the beginning of the word? */ |
---|
708 | i=_owl_editwin_get_index_from_xy(e); |
---|
709 | if ( (e->buff[i]!=' ' && e->buff[i]!='\n' && e->buff[i]!='\0') && |
---|
710 | (e->buff[i-1]==' ' || e->buff[i-1]=='\n') ) { |
---|
711 | owl_editwin_key_left(e); |
---|
712 | } |
---|
713 | |
---|
714 | /* are we starting on a space character? */ |
---|
715 | i=_owl_editwin_get_index_from_xy(e); |
---|
716 | if (e->buff[i]==' ' || e->buff[i]=='\n' || e->buff[i]=='\0') { |
---|
717 | /* find the first non-space */ |
---|
718 | for (x=i; x>=e->lock; x--) { |
---|
719 | if (e->buff[x]!=' ' && e->buff[x]!='\n' && e->buff[x]!='\0') { |
---|
720 | _owl_editwin_set_xy_by_index(e, x); |
---|
721 | break; |
---|
722 | } |
---|
723 | } |
---|
724 | } |
---|
725 | |
---|
726 | /* find the last non-space */ |
---|
727 | i=_owl_editwin_get_index_from_xy(e); |
---|
728 | for (x=i; x>=e->lock; x--) { |
---|
729 | if (e->buff[x-1]==' ' || e->buff[x-1]=='\n') { |
---|
730 | _owl_editwin_set_xy_by_index(e, x); |
---|
731 | break; |
---|
732 | } |
---|
733 | } |
---|
734 | _owl_editwin_set_xy_by_index(e, x); |
---|
735 | } |
---|
736 | |
---|
737 | |
---|
738 | void owl_editwin_delete_nextword(owl_editwin *e) |
---|
739 | { |
---|
740 | int z; |
---|
741 | |
---|
742 | if (e->bufflen==0) return; |
---|
743 | |
---|
744 | /* if we start out on a space character then gobble all the spaces |
---|
745 | up first */ |
---|
746 | while (1) { |
---|
747 | z=_owl_editwin_get_index_from_xy(e); |
---|
748 | if (e->buff[z]==' ' || e->buff[z]=='\n') { |
---|
749 | owl_editwin_delete_char(e); |
---|
750 | } else { |
---|
751 | break; |
---|
752 | } |
---|
753 | } |
---|
754 | |
---|
755 | /* then nuke the next word */ |
---|
756 | while (1) { |
---|
757 | z=_owl_editwin_get_index_from_xy(e); |
---|
758 | /* z == e->bufflen check added to prevent a hang I (nelhage) have |
---|
759 | seen repeatedly while using owl. I'm not sure precisely what |
---|
760 | conditions lead to it. */ |
---|
761 | if (z == e->bufflen |
---|
762 | || e->buff[z+1]==' ' || e->buff[z+1]=='\n' || e->buff[z+1]=='\0') break; |
---|
763 | owl_editwin_delete_char(e); |
---|
764 | } |
---|
765 | owl_editwin_delete_char(e); |
---|
766 | } |
---|
767 | |
---|
768 | void owl_editwin_delete_previousword(owl_editwin *e) |
---|
769 | { |
---|
770 | /* go backwards to the last non-space character, then delete chars */ |
---|
771 | int i, startpos, endpos; |
---|
772 | |
---|
773 | startpos = _owl_editwin_get_index_from_xy(e); |
---|
774 | owl_editwin_move_to_previousword(e); |
---|
775 | endpos = _owl_editwin_get_index_from_xy(e); |
---|
776 | for (i=0; i<startpos-endpos; i++) { |
---|
777 | owl_editwin_delete_char(e); |
---|
778 | } |
---|
779 | } |
---|
780 | |
---|
781 | void owl_editwin_delete_to_endofline(owl_editwin *e) |
---|
782 | { |
---|
783 | int i; |
---|
784 | |
---|
785 | if (owl_editwin_get_numchars_on_line(e, e->buffy)>e->buffx) { |
---|
786 | /* normal line */ |
---|
787 | i=_owl_editwin_get_index_from_xy(e); |
---|
788 | while(i < e->bufflen) { |
---|
789 | if (e->buff[i]!='\n') { |
---|
790 | owl_editwin_delete_char(e); |
---|
791 | } else if ((e->buff[i]=='\n') && (i==e->bufflen-1)) { |
---|
792 | owl_editwin_delete_char(e); |
---|
793 | } else { |
---|
794 | return; |
---|
795 | } |
---|
796 | } |
---|
797 | } else if (e->buffy+1 < owl_editwin_get_numlines(e)) { |
---|
798 | /* line with cursor at the end but not on very last line */ |
---|
799 | owl_editwin_key_right(e); |
---|
800 | owl_editwin_backspace(e); |
---|
801 | } |
---|
802 | } |
---|
803 | |
---|
804 | void owl_editwin_move_to_line_end(owl_editwin *e) |
---|
805 | { |
---|
806 | e->buffx=owl_editwin_get_numchars_on_line(e, e->buffy); |
---|
807 | } |
---|
808 | |
---|
809 | void owl_editwin_move_to_line_start(owl_editwin *e) |
---|
810 | { |
---|
811 | e->buffx=0; |
---|
812 | owl_editwin_adjust_for_locktext(e); |
---|
813 | } |
---|
814 | |
---|
815 | void owl_editwin_move_to_end(owl_editwin *e) |
---|
816 | { |
---|
817 | /* go to last char */ |
---|
818 | e->buffy=owl_editwin_get_numlines(e)-1; |
---|
819 | e->buffx=owl_editwin_get_numchars_on_line(e, e->buffy); |
---|
820 | owl_editwin_key_right(e); |
---|
821 | |
---|
822 | /* do we need to scroll? */ |
---|
823 | /* |
---|
824 | if (e->buffy-e->topline > e->winlines) { |
---|
825 | e->topline+=e->winlines/2; |
---|
826 | } |
---|
827 | */ |
---|
828 | owl_editwin_recenter(e); |
---|
829 | } |
---|
830 | |
---|
831 | void owl_editwin_move_to_top(owl_editwin *e) |
---|
832 | { |
---|
833 | _owl_editwin_set_xy_by_index(e, 0); |
---|
834 | |
---|
835 | /* do we need to scroll? */ |
---|
836 | e->topline=0; |
---|
837 | |
---|
838 | owl_editwin_adjust_for_locktext(e); |
---|
839 | } |
---|
840 | |
---|
841 | void owl_editwin_fill_paragraph(owl_editwin *e) |
---|
842 | { |
---|
843 | int i, save; |
---|
844 | |
---|
845 | /* save our starting point */ |
---|
846 | save=_owl_editwin_get_index_from_xy(e); |
---|
847 | |
---|
848 | /* scan back to the beginning of this paragraph */ |
---|
849 | for (i=save; i>=e->lock; i--) { |
---|
850 | if ( (i<=e->lock) || |
---|
851 | ((e->buff[i]=='\n') && (e->buff[i-1]=='\n'))) { |
---|
852 | _owl_editwin_set_xy_by_index(e, i+1); |
---|
853 | break; |
---|
854 | } |
---|
855 | } |
---|
856 | |
---|
857 | /* main loop */ |
---|
858 | while (1) { |
---|
859 | i=_owl_editwin_get_index_from_xy(e); |
---|
860 | |
---|
861 | /* bail if we hit the end of the buffer */ |
---|
862 | if (i>=e->bufflen) break; |
---|
863 | |
---|
864 | /* bail if we hit the end of the paragraph */ |
---|
865 | if (e->buff[i]=='\n' && e->buff[i+1]=='\n') break; |
---|
866 | |
---|
867 | /* if we've travelled too far, linewrap */ |
---|
868 | if ((e->buffx) >= e->fillcol) { |
---|
869 | _owl_editwin_linewrap_word(e); |
---|
870 | } |
---|
871 | |
---|
872 | /* did we hit the end of a line too soon? */ |
---|
873 | i=_owl_editwin_get_index_from_xy(e); |
---|
874 | if (e->buff[i]=='\n' && e->buffx<e->fillcol-1) { |
---|
875 | /* ********* we need to make sure we don't pull in a word that's too long ***********/ |
---|
876 | e->buff[i]=' '; |
---|
877 | } |
---|
878 | |
---|
879 | /* fix spacing */ |
---|
880 | i=_owl_editwin_get_index_from_xy(e); |
---|
881 | if (e->buff[i]==' ' && e->buff[i+1]==' ') { |
---|
882 | if (e->buff[i-1]=='.' || e->buff[i-1]=='!' || e->buff[i-1]=='?') { |
---|
883 | owl_editwin_key_right(e); |
---|
884 | } else { |
---|
885 | owl_editwin_delete_char(e); |
---|
886 | /* if we did this ahead of the save point, adjust it */ |
---|
887 | if (i<save) save--; |
---|
888 | } |
---|
889 | } else { |
---|
890 | owl_editwin_key_right(e); |
---|
891 | } |
---|
892 | |
---|
893 | } |
---|
894 | |
---|
895 | /* put cursor back at starting point */ |
---|
896 | _owl_editwin_set_xy_by_index(e, save); |
---|
897 | |
---|
898 | /* do we need to scroll? */ |
---|
899 | if (e->buffy-e->topline < 0) { |
---|
900 | e->topline-=e->winlines/2; |
---|
901 | } |
---|
902 | } |
---|
903 | |
---|
904 | /* returns true if only whitespace remains */ |
---|
905 | int owl_editwin_is_at_end(owl_editwin *e) |
---|
906 | { |
---|
907 | int cur=_owl_editwin_get_index_from_xy(e); |
---|
908 | return (only_whitespace(e->buff+cur)); |
---|
909 | } |
---|
910 | |
---|
911 | int owl_editwin_check_dotsend(owl_editwin *e) |
---|
912 | { |
---|
913 | int i; |
---|
914 | |
---|
915 | if (!e->dotsend) return(0); |
---|
916 | for (i=e->bufflen-1; i>0; i--) { |
---|
917 | if (e->buff[i] == '.' |
---|
918 | && (e->buff[i-1] == '\n' || e->buff[i-1] == '\r') |
---|
919 | && (e->buff[i+1] == '\n' || e->buff[i+1] == '\r')) { |
---|
920 | e->bufflen = i; |
---|
921 | e->buff[i] = '\0'; |
---|
922 | return(1); |
---|
923 | } |
---|
924 | if (!isspace((int) e->buff[i])) { |
---|
925 | return(0); |
---|
926 | } |
---|
927 | } |
---|
928 | return(0); |
---|
929 | } |
---|
930 | |
---|
931 | void owl_editwin_post_process_char(owl_editwin *e, int j) |
---|
932 | { |
---|
933 | /* check if we need to scroll down */ |
---|
934 | if (e->buffy-e->topline >= e->winlines) { |
---|
935 | e->topline+=e->winlines/2; |
---|
936 | } |
---|
937 | if ((j==13 || j==10) && owl_editwin_check_dotsend(e)) { |
---|
938 | owl_command_editmulti_done(e); |
---|
939 | return; |
---|
940 | } |
---|
941 | owl_editwin_redisplay(e, 0); |
---|
942 | } |
---|
943 | |
---|
944 | void owl_editwin_process_char(owl_editwin *e, int j) |
---|
945 | { |
---|
946 | if (j == ERR) return; |
---|
947 | if (j>127 || ((j<32) && (j!=10) && (j!=13))) { |
---|
948 | return; |
---|
949 | } else { |
---|
950 | owl_editwin_insert_char(e, j); |
---|
951 | } |
---|
952 | } |
---|
953 | |
---|
954 | char *owl_editwin_get_text(owl_editwin *e) |
---|
955 | { |
---|
956 | return(e->buff+e->lock); |
---|
957 | } |
---|
958 | |
---|
959 | int owl_editwin_get_numchars_on_line(owl_editwin *e, int line) |
---|
960 | { |
---|
961 | int i; |
---|
962 | char *ptr1, *ptr2; |
---|
963 | |
---|
964 | if (e->bufflen==0) return(0); |
---|
965 | |
---|
966 | /* first go to the yth line */ |
---|
967 | ptr1=e->buff; |
---|
968 | for (i=0; i<line; i++) { |
---|
969 | ptr2=strchr(ptr1, '\n'); |
---|
970 | if (!ptr2) { |
---|
971 | /* we're already on the last line */ |
---|
972 | return(0); |
---|
973 | } |
---|
974 | ptr1=ptr2+1; |
---|
975 | } |
---|
976 | |
---|
977 | /* now go to the xth character */ |
---|
978 | ptr2=strchr(ptr1, '\n'); |
---|
979 | if (!ptr2) { |
---|
980 | return(e->buff + e->bufflen - ptr1); |
---|
981 | } |
---|
982 | return(ptr2-ptr1); /* don't count the newline for now */ |
---|
983 | } |
---|
984 | |
---|
985 | int owl_editwin_get_numlines(owl_editwin *e) |
---|
986 | { |
---|
987 | return(owl_text_num_lines(e->buff)); |
---|
988 | } |
---|
989 | |
---|