ui/gtk/text.c

Thu, 03 Apr 2014 14:16:41 +0200

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Thu, 03 Apr 2014 14:16:41 +0200
changeset 22
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parent 12
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child 27
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permissions
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textarea automatically sets selection group (GTK, Motif)

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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 #include <string.h>
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32
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33 #include "text.h"
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34 #include "container.h"
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35
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36 static void selection_handler(
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37 GtkTextBuffer *buf,
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38 GtkTextIter *location,
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39 GtkTextMark *mark,
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40 UiTextArea *textview)
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41 {
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42 const char *mname = gtk_text_mark_get_name(mark);
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43 if(mname) {
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44 GtkTextIter begin;
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45 GtkTextIter end;
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46 int sel = gtk_text_buffer_get_selection_bounds (buf, &begin, &end);
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47 if(sel != textview->last_selection_state) {
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48 if(sel) {
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49 ui_set_group(textview->ctx, UI_GROUP_SELECTION);
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50 } else {
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51 ui_unset_group(textview->ctx, UI_GROUP_SELECTION);
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52 }
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53 }
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54 textview->last_selection_state = sel;
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55 }
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56 }
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57
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58 UIWIDGET ui_textarea(UiObject *obj, UiText *value) {
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59 GtkWidget *text_area = gtk_text_view_new();
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60 gtk_text_view_set_wrap_mode(GTK_TEXT_VIEW(text_area), GTK_WRAP_WORD_CHAR);
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61 g_signal_connect(
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62 text_area,
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63 "realize",
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64 G_CALLBACK(ui_textarea_realize_event),
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65 NULL);
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66 g_signal_connect(
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67 text_area,
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68 "selection-clear-event",
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69 G_CALLBACK(selection_handler),
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70 NULL);
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71
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72 UiTextArea *uitext = ucx_mempool_malloc(
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73 obj->ctx->mempool,
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74 sizeof(UiTextArea));
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75 uitext->ctx = obj->ctx;
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76 uitext->last_selection_state = 0;
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78 GtkWidget *scroll_area = gtk_scrolled_window_new (NULL, NULL);
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79 gtk_scrolled_window_set_policy(
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80 GTK_SCROLLED_WINDOW(scroll_area),
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81 GTK_POLICY_AUTOMATIC,
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82 GTK_POLICY_AUTOMATIC); // GTK_POLICY_ALWAYS
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83 gtk_container_add(GTK_CONTAINER(scroll_area), text_area);
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84
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85 // font and padding
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86 PangoFontDescription *font;
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87 font = pango_font_description_from_string("Monospace");
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88 gtk_widget_modify_font(text_area, font);
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89 pango_font_description_free(font);
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90
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91 gtk_text_view_set_left_margin(GTK_TEXT_VIEW(text_area), 2);
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92 gtk_text_view_set_right_margin(GTK_TEXT_VIEW(text_area), 2);
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93
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94 // add
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95 UiContainer *ct = uic_get_current_container(obj);
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96 ct->add(ct, scroll_area);
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97
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98 // bind value
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99 if(value) {
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100 value->get = ui_textarea_get;
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101 value->set = ui_textarea_set;
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102 value->getsubstr = ui_textarea_getsubstr;
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103 value->insert = ui_textarea_insert;
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104 value->value = NULL;
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105 GtkTextBuffer *buf = gtk_text_view_get_buffer(GTK_TEXT_VIEW(text_area));
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106 value->obj = buf;
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107 if(!value->undomgr) {
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108 value->undomgr = ui_create_undomgr();
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109 }
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110
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111 // register undo manager
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112 g_signal_connect(
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113 buf,
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114 "insert-text",
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115 G_CALLBACK(ui_textbuf_insert),
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116 value);
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117 g_signal_connect(
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118 buf,
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119 "delete-range",
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120 G_CALLBACK(ui_textbuf_delete),
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121 value);
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122
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123 g_signal_connect(
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124 buf,
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125 "mark-set",
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126 G_CALLBACK(selection_handler),
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127 uitext);
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128 }
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129
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130 return scroll_area;
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131 }
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132
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133 char* ui_textarea_get(UiText *text) {
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134 if(text->value) {
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135 g_free(text->value);
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136 }
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137 GtkTextBuffer *buf = text->obj;
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138 GtkTextIter start;
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139 GtkTextIter end;
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140 gtk_text_buffer_get_bounds(buf, &start, &end);
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141 char *str = gtk_text_buffer_get_text(buf, &start, &end, FALSE);
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142 text->value = str;
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143 return str;
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144 }
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145
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146 void ui_textarea_set(UiText *text, char *str) {
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147 if(text->value) {
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diff changeset
148 g_free(text->value);
12
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149 }
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diff changeset
150 text->value = NULL;
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diff changeset
151 gtk_text_buffer_set_text((GtkTextBuffer*)text->obj, str, -1);
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152 }
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153
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diff changeset
154 char* ui_textarea_getsubstr(UiText *text, int begin, int end) {
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diff changeset
155 if(text->value) {
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diff changeset
156 g_free(text->value);
5
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157 }
12
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diff changeset
158 GtkTextBuffer *buf = text->obj;
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diff changeset
159 GtkTextIter ib;
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diff changeset
160 GtkTextIter ie;
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diff changeset
161 gtk_text_buffer_get_iter_at_offset(text->obj, &ib, begin);
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diff changeset
162 gtk_text_buffer_get_iter_at_offset(text->obj, &ie, end);
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diff changeset
163 char *str = gtk_text_buffer_get_text(buf, &ib, &ie, FALSE);
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164 text->value = str;
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diff changeset
165 return str;
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diff changeset
166 }
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diff changeset
167
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diff changeset
168 void ui_textarea_insert(UiText *text, int pos, char *str) {
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diff changeset
169 if(text->value) {
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diff changeset
170 g_free(text->value);
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171 }
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diff changeset
172 text->value = NULL;
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diff changeset
173 GtkTextIter offset;
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diff changeset
174 gtk_text_buffer_get_iter_at_offset(text->obj, &offset, pos);
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diff changeset
175 gtk_text_buffer_insert(text->obj, &offset, str, -1);
5
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176 }
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177
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178 void ui_textarea_realize_event(GtkWidget *widget, gpointer data) {
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179 gtk_widget_grab_focus(widget);
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180 }
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181
6
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182
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183 // undo manager functions
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184
5
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185 void ui_textbuf_insert(
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186 GtkTextBuffer *textbuffer,
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187 GtkTextIter *location,
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188 char *text,
6
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189 int length,
5
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190 void *data)
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191 {
6
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192 UiText *value = data;
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193 UiUndoMgr *mgr = value->undomgr;
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194 if(!mgr->event) {
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195 return;
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196 }
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197
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198 if(mgr->cur) {
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199 UcxList *elm = mgr->cur->next;
9
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diff changeset
200 if(elm) {
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201 mgr->cur->next = NULL;
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diff changeset
202 while(elm) {
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203 elm->prev = NULL;
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204 UcxList *next = elm->next;
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diff changeset
205 ui_free_textbuf_op(elm->data);
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diff changeset
206 free(elm);
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diff changeset
207 elm = next;
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diff changeset
208 }
6
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diff changeset
209 }
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diff changeset
210
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diff changeset
211 UiTextBufOp *last_op = mgr->cur->data;
9
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diff changeset
212 if(
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diff changeset
213 last_op->type == UI_TEXTBUF_INSERT &&
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diff changeset
214 ui_check_insertstr(last_op->text, last_op->len, text, length) == 0)
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215 {
6
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216 // append text to last op
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217 int ln = last_op->len;
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218 char *newtext = malloc(ln + length + 1);
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diff changeset
219 memcpy(newtext, last_op->text, ln);
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diff changeset
220 memcpy(newtext+ln, text, length);
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diff changeset
221 newtext[ln+length] = '\0';
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diff changeset
222
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diff changeset
223 last_op->text = newtext;
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diff changeset
224 last_op->len = ln + length;
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diff changeset
225 last_op->end += length;
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diff changeset
226
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diff changeset
227 return;
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diff changeset
228 }
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229 }
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diff changeset
230
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diff changeset
231 char *dpstr = malloc(length + 1);
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232 memcpy(dpstr, text, length);
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233 dpstr[length] = 0;
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diff changeset
234
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diff changeset
235 UiTextBufOp *op = malloc(sizeof(UiTextBufOp));
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diff changeset
236 op->type = UI_TEXTBUF_INSERT;
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diff changeset
237 op->start = gtk_text_iter_get_offset(location);
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diff changeset
238 op->end = op->start+length;
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diff changeset
239 op->len = length;
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diff changeset
240 op->text = dpstr;
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diff changeset
241
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diff changeset
242 UcxList *elm = ucx_list_append(NULL, op);
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diff changeset
243 mgr->cur = elm;
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diff changeset
244 mgr->begin = ucx_list_concat(mgr->begin, elm);
5
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245 }
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246
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diff changeset
247 void ui_textbuf_delete(
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diff changeset
248 GtkTextBuffer *textbuffer,
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diff changeset
249 GtkTextIter *start,
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diff changeset
250 GtkTextIter *end,
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parents:
diff changeset
251 void *data)
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diff changeset
252 {
6
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diff changeset
253 UiText *value = data;
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diff changeset
254 UiUndoMgr *mgr = value->undomgr;
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diff changeset
255 if(!mgr->event) {
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diff changeset
256 return;
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diff changeset
257 }
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diff changeset
258
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diff changeset
259 if(mgr->cur) {
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diff changeset
260 UcxList *elm = mgr->cur->next;
9
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diff changeset
261 if(elm) {
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diff changeset
262 mgr->cur->next = NULL;
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diff changeset
263 while(elm) {
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diff changeset
264 elm->prev = NULL;
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diff changeset
265 UcxList *next = elm->next;
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diff changeset
266 ui_free_textbuf_op(elm->data);
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diff changeset
267 free(elm);
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diff changeset
268 elm = next;
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diff changeset
269 }
6
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diff changeset
270 }
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diff changeset
271 }
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diff changeset
272
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diff changeset
273 char *text = gtk_text_buffer_get_text(value->obj, start, end, FALSE);
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diff changeset
274
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diff changeset
275 UiTextBufOp *op = malloc(sizeof(UiTextBufOp));
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diff changeset
276 op->type = UI_TEXTBUF_DELETE;
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diff changeset
277 op->start = gtk_text_iter_get_offset(start);
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diff changeset
278 op->end = gtk_text_iter_get_offset(end);
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diff changeset
279 op->len = op->end - op->start;
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diff changeset
280
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diff changeset
281 char *dpstr = malloc(op->len + 1);
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diff changeset
282 memcpy(dpstr, text, op->len);
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diff changeset
283 dpstr[op->len] = 0;
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diff changeset
284 op->text = dpstr;
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diff changeset
285
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diff changeset
286 UcxList *elm = ucx_list_append(NULL, op);
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diff changeset
287 mgr->cur = elm;
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diff changeset
288 mgr->begin = ucx_list_concat(mgr->begin, elm);
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diff changeset
289 }
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diff changeset
290
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diff changeset
291 UiUndoMgr* ui_create_undomgr() {
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diff changeset
292 UiUndoMgr *mgr = malloc(sizeof(UiUndoMgr));
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diff changeset
293 mgr->begin = NULL;
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diff changeset
294 mgr->cur = NULL;
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diff changeset
295 mgr->length = 0;
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diff changeset
296 mgr->event = 1;
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diff changeset
297 return mgr;
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diff changeset
298 }
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diff changeset
299
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diff changeset
300 void ui_free_textbuf_op(UiTextBufOp *op) {
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diff changeset
301 if(op->text) {
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302 free(op->text);
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303 }
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304 free(op);
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305 }
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306
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307 int ui_check_insertstr(char *oldstr, int oldlen, char *newstr, int newlen) {
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308 // return 1 if oldstr + newstr are one word
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309
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310 int has_space = 0;
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311 for(int i=0;i<oldlen;i++) {
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312 if(oldstr[i] < 33) {
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313 has_space = 1;
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314 break;
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315 }
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316 }
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317
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318 for(int i=0;i<newlen;i++) {
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319 if(has_space && newstr[i] > 32) {
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320 return 1;
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321 }
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322 }
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323
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324 return 0;
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325 }
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326
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327 void ui_text_undo(UiText *value) {
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328 UiUndoMgr *mgr = value->undomgr;
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329
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330 if(mgr->cur) {
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331 UiTextBufOp *op = mgr->cur->data;
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332 mgr->event = 0;
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333 switch(op->type) {
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334 case UI_TEXTBUF_INSERT: {
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335 GtkTextIter begin;
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336 GtkTextIter end;
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337 gtk_text_buffer_get_iter_at_offset(value->obj, &begin, op->start);
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338 gtk_text_buffer_get_iter_at_offset(value->obj, &end, op->end);
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339 gtk_text_buffer_delete(value->obj, &begin, &end);
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340 break;
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341 }
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342 case UI_TEXTBUF_DELETE: {
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343 GtkTextIter begin;
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344 GtkTextIter end;
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345 gtk_text_buffer_get_iter_at_offset(value->obj, &begin, op->start);
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346 gtk_text_buffer_get_iter_at_offset(value->obj, &end, op->end);
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347 gtk_text_buffer_insert(value->obj, &begin, op->text, op->len);
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348 break;
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349 }
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350 }
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351 mgr->event = 1;
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352 mgr->cur = mgr->cur->prev;
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353 }
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354 }
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355
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356 void ui_text_redo(UiText *value) {
8
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357 UiUndoMgr *mgr = value->undomgr;
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358
8
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359 UcxList *elm = NULL;
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360 if(mgr->cur) {
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361 if(mgr->cur->next) {
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362 elm = mgr->cur->next;
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363 }
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364 } else if(mgr->begin) {
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365 elm = mgr->begin;
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366 }
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diff changeset
367
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368 if(elm) {
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369 UiTextBufOp *op = elm->data;
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370 mgr->event = 0;
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371 switch(op->type) {
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372 case UI_TEXTBUF_INSERT: {
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373 GtkTextIter begin;
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374 GtkTextIter end;
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diff changeset
375 gtk_text_buffer_get_iter_at_offset(value->obj, &begin, op->start);
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diff changeset
376 gtk_text_buffer_get_iter_at_offset(value->obj, &end, op->end);
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diff changeset
377 gtk_text_buffer_insert(value->obj, &begin, op->text, op->len);
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378 break;
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379 }
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diff changeset
380 case UI_TEXTBUF_DELETE: {
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381 GtkTextIter begin;
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382 GtkTextIter end;
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diff changeset
383 gtk_text_buffer_get_iter_at_offset(value->obj, &begin, op->start);
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diff changeset
384 gtk_text_buffer_get_iter_at_offset(value->obj, &end, op->end);
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diff changeset
385 gtk_text_buffer_delete(value->obj, &begin, &end);
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diff changeset
386 break;
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387 }
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388 }
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389 mgr->event = 1;
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diff changeset
390 mgr->cur = elm;
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diff changeset
391 }
6
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diff changeset
392 }

mercurial