ui/common/context.c

Fri, 11 Dec 2020 18:32:54 +0100

author
Olaf Wintermann <olaf.wintermann@gmail.com>
date
Fri, 11 Dec 2020 18:32:54 +0100
changeset 4
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parent 3
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permissions
-rw-r--r--

add sqlite dependency

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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 2017 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 #include <inttypes.h>
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33
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34 #include "context.h"
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35 #include "../ui/window.h"
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36 #include "document.h"
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37 #include "types.h"
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38
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39 static UiContext* global_context;
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40
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41 void uic_init_global_context(void) {
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42 UcxMempool *mp = ucx_mempool_new(32);
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43 global_context = uic_context(NULL, mp);
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44 }
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45
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46 UiContext* ui_global_context(void) {
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47 return global_context;
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48 }
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49
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50 UiContext* uic_context(UiObject *toplevel, UcxMempool *mp) {
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51 UiContext *ctx = ucx_mempool_malloc(mp, sizeof(UiContext));
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52 memset(ctx, 0, sizeof(UiContext));
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53 ctx->mempool = mp;
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54 ctx->obj = toplevel;
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55 ctx->vars = ucx_map_new_a(mp->allocator, 16);
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56
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57 ctx->attach_document = uic_context_attach_document;
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58 ctx->detach_document2 = uic_context_detach_document2;
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59
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60 #ifdef UI_GTK
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61 if(toplevel && toplevel->widget) {
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62 ctx->accel_group = gtk_accel_group_new();
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63 gtk_window_add_accel_group(GTK_WINDOW(toplevel->widget), ctx->accel_group);
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64 }
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65 #endif
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66
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67 return ctx;
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68 }
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69
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70 UiContext* uic_root_context(UiContext *ctx) {
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71 return ctx->parent ? uic_root_context(ctx->parent) : ctx;
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72 }
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73
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74 void uic_context_attach_document(UiContext *ctx, void *document) {
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75 ctx->documents = ucx_list_append_a(ctx->mempool->allocator, ctx->documents, document);
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76 ctx->document = ctx->documents->data;
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77
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78 UiContext *doc_ctx = ui_document_context(document);
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79
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80 // check if any parent context has an unbound variable with the same name
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81 // as any document variable
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82 UiContext *var_ctx = ctx;
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83 while(var_ctx) {
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84 if(var_ctx->vars_unbound && var_ctx->vars_unbound->count > 0) {
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85 UcxMapIterator i = ucx_map_iterator(var_ctx->vars_unbound);
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86 UiVar *var;
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87 // rmkeys holds all keys, that shall be removed from vars_unbound
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88 UcxKey *rmkeys = calloc(var_ctx->vars_unbound->count, sizeof(UcxKey));
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89 size_t numkeys = 0;
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90 UCX_MAP_FOREACH(key, var, i) {
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91 UiVar *docvar = ucx_map_get(doc_ctx->vars, key);
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92 if(docvar) {
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93 // bind var to document var
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94 uic_copy_binding(var, docvar, TRUE);
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95 rmkeys[numkeys++] = key; // save the key for removal
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96 }
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97 }
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98 // now that we may have bound some vars to the document,
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99 // we can remove them from the unbound map
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100 for(size_t k=0;k<numkeys;k++) {
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101 ucx_map_remove(var_ctx->vars_unbound, rmkeys[k]);
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102 }
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103 }
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104
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105 var_ctx = ctx->parent;
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106 }
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107 }
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108
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109 static void uic_context_unbind_vars(UiContext *ctx) {
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110 UcxMapIterator i = ucx_map_iterator(ctx->vars);
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111 UiVar *var;
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112 UCX_MAP_FOREACH(key, var, i) {
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113 if(var->from && var->from_ctx) {
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114 uic_save_var2(var);
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115 uic_copy_binding(var, var->from, FALSE);
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116 ucx_map_put(var->from_ctx->vars_unbound, key, var->from);
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117 var->from_ctx = ctx;
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118 }
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119 }
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120
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121 UCX_FOREACH(elm, ctx->documents) {
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122 UiContext *subctx = ui_document_context(elm->data);
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123 uic_context_unbind_vars(subctx);
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124 }
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125 }
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126
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127 void uic_context_detach_document2(UiContext *ctx, void *document) {
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128 // find the document in the documents list
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129 UcxList *doc = NULL;
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130 UCX_FOREACH(elm, ctx->documents) {
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131 if(elm->data == document) {
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132 doc = elm;
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133 break;
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134 }
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135 }
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136 if(!doc) {
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137 return; // document is not a subdocument of this context
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138 }
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139
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140 ctx->documents = ucx_list_remove_a(ctx->mempool->allocator, ctx->documents, doc);
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141 ctx->document = ctx->documents ? ctx->documents->data : NULL;
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142
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143 UiContext *docctx = ui_document_context(document);
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144 uic_context_unbind_vars(docctx); // unbind all doc/subdoc vars from the parent
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145 }
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146
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147 void uic_context_detach_all(UiContext *ctx) {
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148 UcxList *ls = ucx_list_clone(ctx->documents, NULL, NULL);
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149 UCX_FOREACH(elm, ls) {
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150 ctx->detach_document2(ctx, elm->data);
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151 }
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152 ucx_list_free(ls);
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153 }
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154
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155 static UiVar* ctx_getvar(UiContext *ctx, UcxKey key) {
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156 UiVar *var = ucx_map_get(ctx->vars, key);
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157 if(!var) {
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158 UCX_FOREACH(elm, ctx->documents) {
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159 UiContext *subctx = ui_document_context(elm->data);
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160 var = ctx_getvar(subctx, key);
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161 if(var) {
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162 break;
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163 }
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164 }
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165 }
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166 return var;
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167 }
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168
2
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169 UiVar* uic_get_var(UiContext *ctx, const char *name) {
0
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170 UcxKey key = ucx_key(name, strlen(name));
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171 return ctx_getvar(ctx, key);
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172 }
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173
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174 UiVar* uic_create_var(UiContext *ctx, const char *name, UiVarType type) {
0
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175 UiVar *var = uic_get_var(ctx, name);
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176 if(var) {
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177 if(var->type == type) {
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178 return var;
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179 } else {
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180 fprintf(stderr, "UiError: var '%s' already bound with different type\n", name);
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181 }
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182 }
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183
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184 var = ui_malloc(ctx, sizeof(UiVar));
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185 var->type = type;
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186 var->value = uic_create_value(ctx, type);
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187 var->from = NULL;
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188 var->from_ctx = ctx;
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189
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190 if(!ctx->vars_unbound) {
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191 ctx->vars_unbound = ucx_map_new_a(ctx->mempool->allocator, 16);
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192 }
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193 ucx_map_cstr_put(ctx->vars_unbound, name, var);
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194
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195 return var;
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196 }
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197
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198 void* uic_create_value(UiContext *ctx, UiVarType type) {
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199 void *val = NULL;
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200 switch(type) {
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201 case UI_VAR_SPECIAL: break;
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202 case UI_VAR_INTEGER: {
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203 val = ui_int_new(ctx, NULL);
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204 break;
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205 }
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206 case UI_VAR_DOUBLE: {
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207 val = ui_double_new(ctx, NULL);
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208 break;
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209 }
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210 case UI_VAR_STRING: {
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211 val = ui_string_new(ctx, NULL);
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212 break;
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213 }
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214 case UI_VAR_TEXT: {
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215 val = ui_text_new(ctx, NULL);
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216 break;
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diff changeset
217 }
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218 case UI_VAR_LIST: {
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219 val = ui_list_new(ctx, NULL);
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220 break;
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diff changeset
221 }
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222 case UI_VAR_RANGE: {
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diff changeset
223 val = ui_range_new(ctx, NULL);
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224 break;
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225 }
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226 }
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227 return val;
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228 }
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229
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230 void uic_copy_binding(UiVar *from, UiVar *to, UiBool copytodoc) {
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231 // check type
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diff changeset
232 if(from->type != to->type) {
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233 fprintf(stderr, "UI Error: var has incompatible type.\n");
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234 return;
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235 }
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236
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237 void *fromvalue = from->value;
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diff changeset
238 // update var
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239 if(copytodoc) {
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240 to->from = from;
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241 to->from_ctx = from->from_ctx;
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242 }
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243
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244 // copy binding
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245 // we don't copy the observer, because the from var has never one
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246 switch(from->type) {
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247 default: fprintf(stderr, "uic_copy_binding: wtf!\n"); break;
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248 case UI_VAR_SPECIAL: break;
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249 case UI_VAR_INTEGER: {
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250 UiInteger *f = fromvalue;
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diff changeset
251 UiInteger *t = to->value;
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diff changeset
252 if(!f->obj) break;
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253 uic_int_copy(f, t);
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diff changeset
254 t->set(t, t->value);
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diff changeset
255 break;
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diff changeset
256 }
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diff changeset
257 case UI_VAR_DOUBLE: {
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diff changeset
258 UiDouble *f = fromvalue;
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259 UiDouble *t = to->value;
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260 if(!f->obj) break;
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diff changeset
261 uic_double_copy(f, t);
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262 t->set(t, t->value);
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diff changeset
263 break;
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diff changeset
264 }
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diff changeset
265 case UI_VAR_STRING: {
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266 UiString *f = fromvalue;
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267 UiString *t = to->value;
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diff changeset
268 if(!f->obj) break;
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269 uic_string_copy(f, t);
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270 char *tvalue = t->value.ptr ? t->value.ptr : "";
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diff changeset
271 t->set(t, tvalue);
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diff changeset
272 break;
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diff changeset
273 }
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diff changeset
274 case UI_VAR_TEXT: {
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275 UiText *f = fromvalue;
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276 UiText *t = to->value;
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diff changeset
277 if(!f->obj) break;
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278 uic_text_copy(f, t);
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279 char *tvalue = t->value.ptr ? t->value.ptr : "";
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280 t->set(t, tvalue);
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281 t->setposition(t, t->pos);
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282 break;
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parents:
diff changeset
283 }
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diff changeset
284 case UI_VAR_LIST: {
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diff changeset
285 UiList *f = fromvalue;
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286 UiList *t = to->value;
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diff changeset
287 if(!f->obj) break;
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diff changeset
288 uic_list_copy(f, t);
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diff changeset
289 t->update(t, -1);
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diff changeset
290 break;
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parents:
diff changeset
291 }
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diff changeset
292 case UI_VAR_RANGE: {
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diff changeset
293 UiRange *f = fromvalue;
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diff changeset
294 UiRange *t = to->value;
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diff changeset
295 if(!f->obj) break;
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diff changeset
296 uic_range_copy(f, t);
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diff changeset
297 t->setextent(t, t->extent);
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diff changeset
298 t->setrange(t, t->min, t->max);
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diff changeset
299 t->set(t, t->value);
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parents:
diff changeset
300 break;
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parents:
diff changeset
301 }
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parents:
diff changeset
302 }
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parents:
diff changeset
303 }
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parents:
diff changeset
304
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parents:
diff changeset
305 void uic_save_var2(UiVar *var) {
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parents:
diff changeset
306 switch(var->type) {
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parents:
diff changeset
307 case UI_VAR_SPECIAL: break;
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parents:
diff changeset
308 case UI_VAR_INTEGER: uic_int_save(var->value); break;
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parents:
diff changeset
309 case UI_VAR_DOUBLE: uic_double_save(var->value); break;
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parents:
diff changeset
310 case UI_VAR_STRING: uic_string_save(var->value); break;
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parents:
diff changeset
311 case UI_VAR_TEXT: uic_text_save(var->value); break;
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parents:
diff changeset
312 case UI_VAR_LIST: break;
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diff changeset
313 case UI_VAR_RANGE: uic_range_save(var->value); break;
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314 }
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315 }
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316
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317 void uic_unbind_var(UiVar *var) {
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318 switch(var->type) {
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319 case UI_VAR_SPECIAL: break;
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320 case UI_VAR_INTEGER: uic_int_unbind(var->value); break;
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321 case UI_VAR_DOUBLE: uic_double_unbind(var->value); break;
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322 case UI_VAR_STRING: uic_string_unbind(var->value); break;
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323 case UI_VAR_TEXT: uic_text_unbind(var->value); break;
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324 case UI_VAR_LIST: uic_list_unbind(var->value); break;
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325 case UI_VAR_RANGE: uic_range_unbind(var->value); break;
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326 }
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327 }
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328
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329 void uic_reg_var(UiContext *ctx, char *name, UiVarType type, void *value) {
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330 // TODO: do we need/want this? Why adding vars to a context after
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331 // widgets reference these? Workarounds:
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332 // 1. add vars to ctx before creating ui
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333 // 2. create ui, create new document with vars, attach doc
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334 // also it would be possible to create a function, that scans unbound vars
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335 // and connects them to available vars
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336 /*
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337 UiContext *rootctx = uic_root_context(ctx);
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338 UiVar *b = NULL;
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339 if(rootctx->bound) {
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340 // some widgets are already bound to some vars
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341 b = ucx_map_cstr_get(rootctx->bound, name);
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342 if(b) {
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343 // a widget is bound to a var with this name
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344 // if ctx is the root context we can remove the var from bound
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345 // because set_doc or detach can't fuck things up
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346 if(ctx == rootctx) {
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347 ucx_map_cstr_remove(ctx->bound, name);
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348 // TODO: free stuff
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349 }
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350 }
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351 }
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352 */
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353
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354 // create new var and add it to doc's vars
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355 UiVar *var = ui_malloc(ctx, sizeof(UiVar));
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356 var->type = type;
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357 var->value = value;
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358 var->from = NULL;
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359 var->from_ctx = ctx;
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360 size_t oldcount = ctx->vars->count;
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361 ucx_map_cstr_put(ctx->vars, name, var);
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362 if(ctx->vars->count != oldcount + 1) {
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363 fprintf(stderr, "UiError: var '%s' already exists\n", name);
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364 }
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365
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366 // TODO: remove?
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367 // a widget is already bound to a var with this name
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368 // copy the binding (like uic_context_set_document)
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369 /*
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370 if(b) {
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371 uic_copy_binding(b, var, TRUE);
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372 }
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373 */
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374 }
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375
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376 void uic_remove_bound_var(UiContext *ctx, UiVar *var) {
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377 // TODO: implement
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378 printf("TODO: implement uic_remove_bound_var\n");
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379 }
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380
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381
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382 // public API
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383
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384 void ui_attach_document(UiContext *ctx, void *document) {
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385 uic_context_attach_document(ctx, document);
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386 }
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387
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388 void ui_detach_document2(UiContext *ctx, void *document) {
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389 uic_context_detach_document2(ctx, document);
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390 }
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391
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392 void ui_context_closefunc(UiContext *ctx, ui_callback fnc, void *udata) {
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393 ctx->close_callback = fnc;
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394 ctx->close_data = udata;
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395 }
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396
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397
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398 void ui_set_group(UiContext *ctx, int group) {
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399 if(ucx_list_find(ctx->groups, (void*)(intptr_t)group, NULL, NULL) == -1) {
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400 ctx->groups = ucx_list_append_a(ctx->mempool->allocator, ctx->groups, (void*)(intptr_t)group);
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401 }
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402
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403 // enable/disable group widgets
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404 uic_check_group_widgets(ctx);
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405 }
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406
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407 void ui_unset_group(UiContext *ctx, int group) {
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408 int i = ucx_list_find(ctx->groups, (void*)(intptr_t)group, NULL, NULL);
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409 if(i != -1) {
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410 UcxList *elm = ucx_list_get(ctx->groups, i);
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411 ctx->groups = ucx_list_remove_a(ctx->mempool->allocator, ctx->groups, elm);
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412 }
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413
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414 // enable/disable group widgets
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415 uic_check_group_widgets(ctx);
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416 }
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417
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418 int* ui_active_groups(UiContext *ctx, int *ngroups) {
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419 if(!ctx->groups) {
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420 return NULL;
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421 }
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422
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423 int nelm = ucx_list_size(ctx->groups);
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424 int *groups = calloc(sizeof(int), nelm);
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425
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426 int i = 0;
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427 UCX_FOREACH(elm, ctx->groups) {
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428 groups[i++] = (intptr_t)elm->data;
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429 }
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430
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431 *ngroups = nelm;
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432 return groups;
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433 }
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434
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435 void uic_check_group_widgets(UiContext *ctx) {
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436 int ngroups = 0;
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437 int *groups = ui_active_groups(ctx, &ngroups);
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438
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439 UCX_FOREACH(elm, ctx->group_widgets) {
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440 UiGroupWidget *gw = elm->data;
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441 char *check = calloc(1, gw->numgroups);
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442
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443 for(int i=0;i<ngroups;i++) {
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444 for(int k=0;k<gw->numgroups;k++) {
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445 if(groups[i] == gw->groups[k]) {
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446 check[k] = 1;
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447 }
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448 }
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449 }
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450
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451 int enable = 1;
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452 for(int i=0;i<gw->numgroups;i++) {
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453 if(check[i] == 0) {
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454 enable = 0;
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455 break;
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456 }
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457 }
3
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458 gw->enable(gw->widget, enable);
0
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459 }
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460
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461 if(groups) {
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462 free(groups);
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463 }
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464 }
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465
3
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466 void ui_widget_set_groups(UiContext *ctx, UIWIDGET widget, ui_enablefunc enable, ...) {
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467 // get groups
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468 UcxList *groups = NULL;
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469 va_list ap;
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470 va_start(ap, enable);
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471 int group;
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472 while((group = va_arg(ap, int)) != -1) {
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473 groups = ucx_list_append(groups, (void*)(intptr_t)group);
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474 }
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475 va_end(ap);
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parents: 2
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476
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477 uic_add_group_widget(ctx, widget, enable, groups);
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parents: 2
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478
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479 ucx_list_free(groups);
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480 }
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481
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482 void uic_add_group_widget(UiContext *ctx, void *widget, ui_enablefunc enable, UcxList *groups) {
0
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483 UcxMempool *mp = ctx->mempool;
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484 UiGroupWidget *gw = ucx_mempool_malloc(mp, sizeof(UiGroupWidget));
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485
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486 gw->widget = widget;
3
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487 gw->enable = enable;
0
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488 gw->numgroups = ucx_list_size(groups);
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489 gw->groups = ucx_mempool_calloc(mp, gw->numgroups, sizeof(int));
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490 int i = 0;
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491 UCX_FOREACH(elm, groups) {
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492 gw->groups[i++] = (intptr_t)elm->data;
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493 }
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494
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495 ctx->group_widgets = ucx_list_append_a(
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496 mp->allocator,
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497 ctx->group_widgets,
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498 gw);
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499 }
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500
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501 void* ui_malloc(UiContext *ctx, size_t size) {
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502 return ctx ? ucx_mempool_malloc(ctx->mempool, size) : NULL;
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503 }
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504
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505 void* ui_calloc(UiContext *ctx, size_t nelem, size_t elsize) {
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506 return ctx ? ucx_mempool_calloc(ctx->mempool, nelem, elsize) : NULL;
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507 }
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508
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509 void ui_free(UiContext *ctx, void *ptr) {
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510 if(ctx) {
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511 ucx_mempool_free(ctx->mempool, ptr);
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512 }
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513 }
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514
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515 void* ui_realloc(UiContext *ctx, void *ptr, size_t size) {
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516 return ctx ? ucx_mempool_realloc(ctx->mempool, ptr, size) : NULL;
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517 }
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parents:
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518

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