ui/motif/text.c

Tue, 22 Jul 2014 19:15:44 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Tue, 22 Jul 2014 19:15:44 +0200
changeset 53
62205699cd0e
parent 36
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child 60
7cd1b8890302
permissions
-rw-r--r--

improved motif tabs

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1 /*
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2 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
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3 *
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4 * Copyright 2014 Olaf Wintermann. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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7 * modification, are permitted provided that the following conditions are met:
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8 *
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9 * 1. Redistributions of source code must retain the above copyright
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10 * notice, this list of conditions and the following disclaimer.
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11 *
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12 * 2. Redistributions in binary form must reproduce the above copyright
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13 * notice, this list of conditions and the following disclaimer in the
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14 * documentation and/or other materials provided with the distribution.
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15 *
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16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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17 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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19 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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20 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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26 * POSSIBILITY OF SUCH DAMAGE.
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27 */
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28
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29 #include <stdio.h>
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30 #include <stdlib.h>
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31
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32 #include "text.h"
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33 #include "container.h"
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34
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35 UIWIDGET ui_textarea(UiObject *obj, UiText *value) {
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36 UiContainer *ct = uic_get_current_container(obj);
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37 int n = 0;
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38 Arg args[16];
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39
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40 //XtSetArg(args[n], XmNeditable, TRUE);
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41 //n++;
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42 XtSetArg(args[n], XmNeditMode, XmMULTI_LINE_EDIT);
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43 n++;
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44
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45 Widget parent = ct->add(ct, args, &n);
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46 Widget text_area = XmCreateScrolledText(parent, "text_area", args, n);
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47 XtManageChild(text_area);
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48
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49 UiTextArea *uitext = ucx_mempool_malloc(
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50 obj->ctx->mempool,
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51 sizeof(UiTextArea));
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52 uitext->ctx = obj->ctx;
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53 uitext->last_selection_state = 0;
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54 XtAddCallback(
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55 text_area,
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56 XmNmotionVerifyCallback,
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57 (XtCallbackProc)ui_text_selection_callback,
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58 uitext);
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59
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60 // bind value
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61 if(value) {
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62 if(value->value) {
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63 XmTextSetString(text_area, value->value);
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64 }
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65
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66 value->set = ui_textarea_set;
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67 value->get = ui_textarea_get;
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68 value->getsubstr = ui_textarea_getsubstr;
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69 value->insert = ui_textarea_insert;
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70 value->position = ui_textarea_position;
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71 value->selection = ui_textarea_selection;
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72 value->length = ui_textarea_length;
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73 value->value = NULL;
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74 value->obj = text_area;
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75
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76 if(!value->undomgr) {
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77 value->undomgr = ui_create_undomgr();
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78 }
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79
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80 XtAddCallback(
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81 text_area,
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82 XmNmodifyVerifyCallback,
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83 (XtCallbackProc)ui_text_modify_callback,
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84 value);
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85 }
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86
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87 return text_area;
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88 }
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89
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90 UIWIDGET ui_textarea_nv(UiObject *obj, char *varname) {
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91 UiVar *var = uic_connect_var(obj->ctx, varname, UI_VAR_TEXT);
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92 if(var) {
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93 UiText *value = var->value;
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94 return ui_textarea(obj, value);
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95 } else {
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96 // TODO: error
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97 }
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98 return NULL;
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99 }
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100
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101 char* ui_textarea_get(UiText *text) {
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102 if(text->value) {
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103 XtFree(text->value);
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104 }
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105 char *str = XmTextGetString(text->obj);
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106 text->value = str;
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107 return str;
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108 }
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109
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110 void ui_textarea_set(UiText *text, char *str) {
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111 if(text->value) {
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112 XtFree(text->value);
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113 }
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114 text->value = NULL;
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115 XmTextSetString(text->obj, str);
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116 }
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117
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118 char* ui_textarea_getsubstr(UiText *text, int begin, int end) {
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119 if(text->value) {
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120 XtFree(text->value);
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121 }
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122 int length = end - begin;
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123 char *str = XtMalloc(length + 1);
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124 XmTextGetSubstring(text->obj, begin, length, length + 1, str);
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125 text->value = str;
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126 return str;
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127 }
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128
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129 void ui_textarea_insert(UiText *text, int pos, char *str) {
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130 if(text->value) {
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131 XtFree(text->value);
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132 }
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133 text->value = NULL;
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134 XmTextInsert(text->obj, pos, str);
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135 }
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136
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137 int ui_textarea_position(UiText *text) {
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138 long begin;
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139 long end;
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140 XmTextGetSelectionPosition(text->obj, &begin, &end);
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141 return begin;
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142 }
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143
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144 void ui_textarea_selection(UiText *text, int *begin, int *end) {
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145 XmTextGetSelectionPosition(text->obj, (long*)begin, (long*)end);
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146 }
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147
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148 int ui_textarea_length(UiText *text) {
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149 return (int)XmTextGetLastPosition(text->obj);
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150 }
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diff changeset
151
9
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152 UiUndoMgr* ui_create_undomgr() {
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153 UiUndoMgr *mgr = malloc(sizeof(UiUndoMgr));
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diff changeset
154 mgr->begin = NULL;
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diff changeset
155 mgr->cur = NULL;
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diff changeset
156 mgr->length = 0;
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diff changeset
157 mgr->event = 1;
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158 return mgr;
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159 }
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diff changeset
160
22
bcf880b29bc3 textarea automatically sets selection group (GTK, Motif)
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diff changeset
161 void ui_text_selection_callback(
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diff changeset
162 Widget widget,
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diff changeset
163 UiTextArea *textarea,
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diff changeset
164 XtPointer data)
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165 {
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166 long left = 0;
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167 long right = 0;
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diff changeset
168 XmTextGetSelectionPosition(widget, &left, &right);
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169 int sel = left < right ? 1 : 0;
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170 if(sel != textarea->last_selection_state) {
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171 if(sel) {
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172 ui_set_group(textarea->ctx, UI_GROUP_SELECTION);
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173 } else {
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174 ui_unset_group(textarea->ctx, UI_GROUP_SELECTION);
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175 }
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176 }
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177 textarea->last_selection_state = sel;
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178 }
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179
9
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180 void ui_text_modify_callback(Widget widget, UiText *value, XtPointer data) {
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181 XmTextVerifyCallbackStruct *txv = (XmTextVerifyCallbackStruct*)data;
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182 int type = txv->text->length > 0 ? UI_TEXTBUF_INSERT : UI_TEXTBUF_DELETE;
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183 UiUndoMgr *mgr = value->undomgr;
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184 if(!mgr->event) {
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185 return;
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186 }
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187
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188 char *text = txv->text->ptr;
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189 int length = txv->text->length;
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190
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191 if(mgr->cur) {
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192 UcxList *elm = mgr->cur->next;
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193 if(elm) {
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194 mgr->cur->next = NULL;
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195 while(elm) {
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196 elm->prev = NULL;
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197 UcxList *next = elm->next;
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198 ui_free_textbuf_op(elm->data);
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199 free(elm);
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200 elm = next;
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201 }
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202 }
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203
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204 if(type == UI_TEXTBUF_INSERT) {
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205 UiTextBufOp *last_op = mgr->cur->data;
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206 if(
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207 last_op->type == UI_TEXTBUF_INSERT &&
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208 ui_check_insertstr(last_op->text, last_op->len, text, length) == 0)
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209 {
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210 // append text to last op
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211 int ln = last_op->len;
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212 char *newtext = malloc(ln + length + 1);
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213 memcpy(newtext, last_op->text, ln);
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214 memcpy(newtext+ln, text, length);
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215 newtext[ln+length] = '\0';
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216
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217 last_op->text = newtext;
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218 last_op->len = ln + length;
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219 last_op->end += length;
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220
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221 return;
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222 }
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223 }
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224 }
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225
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diff changeset
226 char *str;
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227 if(type == UI_TEXTBUF_INSERT) {
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228 str = malloc(length + 1);
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229 memcpy(str, text, length);
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230 str[length] = 0;
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231 } else {
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232 length = txv->endPos - txv->startPos;
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233 str = malloc(length + 1);
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234 XmTextGetSubstring(value->obj, txv->startPos, length, length+1, str);
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235 }
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236
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diff changeset
237 UiTextBufOp *op = malloc(sizeof(UiTextBufOp));
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238 op->type = type;
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diff changeset
239 op->start = txv->startPos;
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240 op->end = txv->endPos + 1;
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diff changeset
241 op->len = length;
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242 op->text = str;
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243
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diff changeset
244 UcxList *elm = ucx_list_append(NULL, op);
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245 mgr->cur = elm;
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diff changeset
246 mgr->begin = ucx_list_concat(mgr->begin, elm);
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247 }
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248
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diff changeset
249 int ui_check_insertstr(char *oldstr, int oldlen, char *newstr, int newlen) {
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250 // return 1 if oldstr + newstr are one word
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251
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252 int has_space = 0;
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253 for(int i=0;i<oldlen;i++) {
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diff changeset
254 if(oldstr[i] < 33) {
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255 has_space = 1;
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diff changeset
256 break;
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diff changeset
257 }
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diff changeset
258 }
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diff changeset
259
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diff changeset
260 for(int i=0;i<newlen;i++) {
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diff changeset
261 if(has_space && newstr[i] > 32) {
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262 return 1;
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diff changeset
263 }
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diff changeset
264 }
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diff changeset
265
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266 return 0;
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diff changeset
267 }
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diff changeset
268
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diff changeset
269 void ui_free_textbuf_op(UiTextBufOp *op) {
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diff changeset
270 if(op->text) {
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271 free(op->text);
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272 }
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diff changeset
273 free(op);
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diff changeset
274 }
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diff changeset
275
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diff changeset
276
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diff changeset
277 void ui_text_undo(UiText *value) {
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diff changeset
278 UiUndoMgr *mgr = value->undomgr;
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diff changeset
279
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diff changeset
280 if(mgr->cur) {
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281 UiTextBufOp *op = mgr->cur->data;
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282 mgr->event = 0;
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diff changeset
283 switch(op->type) {
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diff changeset
284 case UI_TEXTBUF_INSERT: {
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diff changeset
285 XmTextReplace(value->obj, op->start, op->end, "");
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diff changeset
286 break;
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287 }
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diff changeset
288 case UI_TEXTBUF_DELETE: {
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diff changeset
289 XmTextInsert(value->obj, op->start, op->text);
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diff changeset
290 break;
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diff changeset
291 }
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diff changeset
292 }
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diff changeset
293 mgr->event = 1;
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diff changeset
294 mgr->cur = mgr->cur->prev;
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diff changeset
295 }
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296 }
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297
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298 void ui_text_redo(UiText *value) {
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299 UiUndoMgr *mgr = value->undomgr;
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300
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301 UcxList *elm = NULL;
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302 if(mgr->cur) {
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303 if(mgr->cur->next) {
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304 elm = mgr->cur->next;
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305 }
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306 } else if(mgr->begin) {
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307 elm = mgr->begin;
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308 }
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309
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310 if(elm) {
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311 UiTextBufOp *op = elm->data;
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312 mgr->event = 0;
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313 switch(op->type) {
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314 case UI_TEXTBUF_INSERT: {
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315 XmTextInsert(value->obj, op->start, op->text);
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316 break;
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317 }
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318 case UI_TEXTBUF_DELETE: {
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319 XmTextReplace(value->obj, op->start, op->end, "");
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320 break;
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321 }
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322 }
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323 mgr->event = 1;
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324 mgr->cur = elm;
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325 }
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326 }

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