Mercurial > MadButterfly
annotate nodejs/coord.cc @ 1395:a768d74e5f49
Fix the svg:use. For a svg:use, it is a group which include the content it reference. It means that we can not tween it to its origin object directly. Instead, we need to ungroup it and then use the result matrix to generate the tweened transformation matrix. Therefore, we need to concate its matrix to the referenced object.
Ad center object when the bbox-x is not available.
author | wycc |
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date | Sat, 02 Apr 2011 05:36:36 +0800 |
parents | 8ecee58c85c6 |
children | 88c8c874f4b8 |
rev | line source |
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1 // -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 4; -*- |
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2 // vim: sw=4:ts=8:sts=4 |
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3 #include <stdio.h> |
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4 #include <v8.h> |
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5 |
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6 extern "C" { |
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7 #include "mb.h" |
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8 #include "mb_X_supp.h" |
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9 #include "mb_tools.h" |
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10 #include "njs_mb_supp.h" |
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11 } |
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12 |
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13 #include "mbfly_njs.h" |
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14 |
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15 #ifndef ASSERT |
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16 #define ASSERT(x) |
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17 #endif |
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18 |
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19 #define OK 0 |
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20 |
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21 /*! \page jsgc How to Manage Life-cycle of Objects for Javascript. |
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22 * |
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23 * The life-cycle of MadButterfly ojects are simple. A object is live |
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24 * when it is created and dead when it is free. When a coord or shape |
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25 * is free, it is also removed from the tree. There is not way to |
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26 * remove a coord or a shape without freeing it. So, if you want to |
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27 * remove a coord or a shape object from the tree, you can only free |
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28 * it. |
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29 * |
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30 * Javascript, in conventional, does not free an object. It has GC, |
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31 * the engine, being used, will free an object if it is no more |
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32 * referenced. So, we had better provide a removing function, but |
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33 * actually free an object. In idea situation, a new MB object would |
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34 * be created for and attached on the JS object, when an object added |
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35 * back to the tree. But, it means we need to keep states of an |
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36 * object and create a new one with the same states later. It is |
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37 * complicated. So, once an object is removed, it is invalidated. |
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38 * |
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39 * I hope someone would implement a higher abstract layer, in JS, to |
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40 * implement the idea model that recreate a new object when an |
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41 * invalidated JS object being added back. |
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42 * |
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43 * An invalid object is the one with NULL internal field and obj.valid |
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44 * == false. The binding of MadButterfly hold a reference to every |
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45 * object added to the tree of a mbrt (runtime object), and remove the |
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46 * reference and invalidate it when it being removed. |
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47 * |
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48 * For coords, they are always attached to the tree when it is valid. |
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49 * So, binding hold a persistent reference to it. The reference is |
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50 * purged when a coord being removed from the tree and being |
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51 * invalidated. |
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52 * |
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53 * For any shape, it is not attached to the tree at begining, but is |
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54 * attached to a tree laterly, or is collected by GC. The binding |
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55 * hold a weak reference for a new shape, and upgrade to a strong |
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56 * reference when the shape being added to the tree. |
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57 */ |
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58 |
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59 using namespace v8; |
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60 |
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61 /*! \defgroup xnjsmb_coord JS binding for coord objects. |
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62 * \ingroup xnjsmb |
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63 * |
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64 * @{ |
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65 */ |
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66 /*! \brief Invalidate JS objects for coords and shapes in a subtree. |
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67 * |
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68 * \param self is the object of the root of subtree. |
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69 * |
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70 * \sa \ref jsgc |
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71 */ |
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72 static void |
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73 xnjsmb_coord_invalidate_subtree(coord_t *coord) { |
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74 Persistent<Object> *child_hdl; |
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75 Persistent<Object> *mem_hdl; |
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76 coord_t *child; |
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77 shape_t *mem; |
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78 Handle<Value> _false = Boolean::New(0); |
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79 |
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80 /* Invalidate all coords in the subtree */ |
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81 FOR_COORDS_PREORDER(coord, child) { |
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82 child_hdl = (Persistent<Object> *)mb_prop_get(&child->obj.props, |
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83 PROP_JSOBJ); |
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84 SET(*child_hdl, "valid", _false); |
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85 WRAP(*child_hdl, NULL); |
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86 child_hdl->Dispose(); |
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87 delete child_hdl; |
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88 |
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89 /* Invalidate members of a coord */ |
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90 FOR_COORD_SHAPES(child, mem) { |
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91 mem_hdl = (Persistent<Object> *)mb_prop_get(&mem->obj.props, |
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92 PROP_JSOBJ); |
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93 SET(*mem_hdl, "valid", _false); |
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94 WRAP(*mem_hdl, NULL); |
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95 mem_hdl->Dispose(); |
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96 delete mem_hdl; |
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97 } |
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98 } |
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99 } |
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100 |
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101 /*! \brief Free C objects for coords and shapes in a subtree. |
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102 * |
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103 * \param self is the object of the root of subtree. |
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104 * |
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105 * \sa \ref jsgc |
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106 */ |
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107 static void |
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108 xnjsmb_coord_free_subtree(redraw_man_t *rdman, coord_t *coord) { |
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109 coord_t *child, *last_child; |
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110 shape_t *mem, *last_mem; |
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111 int r; |
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112 |
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113 rdman_coord_changed(rdman, coord); |
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114 |
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115 last_child = NULL; |
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116 FOR_COORDS_POSTORDER(coord, child) { |
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117 if(last_child != NULL) { |
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118 r = rdman_coord_free(rdman, last_child); |
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119 if(r != OK) |
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120 THROW_noret("Unknown error"); |
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121 } |
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122 |
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123 /* Free members of a coord */ |
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124 last_mem = NULL; |
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125 FOR_COORD_SHAPES(child, mem) { |
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126 if(last_mem != NULL) { |
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127 r = rdman_shape_free(rdman, last_mem); |
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128 if(r != OK) |
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129 THROW_noret("Unknown error"); |
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130 } |
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131 |
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132 last_mem = mem; |
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133 } |
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134 if(last_mem != NULL) { |
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135 r = rdman_shape_free(rdman, last_mem); |
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136 if(r != OK) |
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137 THROW_noret("Unknown error"); |
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138 } |
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139 |
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140 last_child = child; |
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141 } |
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142 if(last_child != NULL) { |
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143 r = rdman_coord_free(rdman, last_child); |
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144 if(r != OK) |
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145 THROW_noret("Unknown error"); |
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146 } |
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147 } |
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148 |
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149 static void |
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150 xnjsmb_coord_mod(Handle<Object> self, coord_t *coord) { |
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151 Persistent<Object> *self_hdl; |
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152 subject_t *subject; |
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153 Handle<Value> subject_o; |
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154 |
680
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155 /* Keep associated js object in property store for retrieving, |
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156 * later, without create new js object. |
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157 */ |
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158 self_hdl = new Persistent<Object>(); |
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159 *self_hdl = Persistent<Object>::New(self); |
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160 mb_prop_set(&coord->obj.props, PROP_JSOBJ, self_hdl); |
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161 |
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162 subject = coord->mouse_event; |
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163 subject_o = export_xnjsmb_auto_subject_new(subject); |
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164 SET(self, "mouse_event", subject_o); |
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165 SET(self, "valid", Boolean::New(1)); |
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166 } |
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167 |
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168 static float |
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169 coord_get_index(coord_t *coord, Handle<Object> self, int idx, |
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170 const char **err) { |
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171 if(idx < 0 || idx >= 6) { |
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172 *err = "Invalid index: out of range"; |
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173 return 0; |
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174 } |
557
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175 |
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176 return coord_get_matrix(coord)[idx]; |
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177 } |
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178 |
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179 static float |
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180 coord_set_index(coord_t *coord, Handle<Object> self, |
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181 int idx, float v, const char **err) { |
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182 Handle<Object> js_rt; |
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183 redraw_man_t *rdman; |
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184 |
661
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185 if(idx < 0 || idx >= 6) { |
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186 *err = "Invalid index: out of range"; |
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187 return 0; |
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188 } |
557
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189 |
661
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190 coord_get_matrix(coord)[idx] = v; |
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191 |
560
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192 js_rt = GET(self, "mbrt")->ToObject(); |
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193 rdman = xnjsmb_rt_rdman(js_rt); |
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194 rdman_coord_changed(rdman, coord); |
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195 |
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196 return v; |
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197 } |
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198 |
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199 static void |
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200 xnjsmb_coord_add_shape(coord_t *coord, Handle<Object> self, |
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201 shape_t *shape, const char **err) { |
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202 Handle<Object> js_rt; |
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203 Persistent<Object> *shape_hdl; |
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204 redraw_man_t *rdman; |
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Function of add a shape to a coord in Javascript.
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205 int r; |
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206 |
661
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207 js_rt = GET(self, "mbrt")->ToObject(); |
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208 rdman = xnjsmb_rt_rdman(js_rt); |
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209 r = rdman_add_shape(rdman, shape, coord); |
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210 if(r != 0) |
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211 *err = "Unknown error"; |
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212 |
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213 /* see \ref jsgc */ |
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214 shape_hdl = (Persistent<Object> *)mb_prop_get(&shape->obj.props, |
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215 PROP_JSOBJ); |
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216 shape_hdl->ClearWeak(); |
778
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217 rdman_shape_changed(rdman, shape); |
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218 } |
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219 |
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220 static void |
745
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Refactor code of free C objects into xnjsmb_coord_free_subtree
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221 xnjsmb_coord_remove(coord_t *coord, Handle<Object> self) { |
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Refactor code of free C objects into xnjsmb_coord_free_subtree
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222 Handle<Object> js_rt; |
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Refactor code of free C objects into xnjsmb_coord_free_subtree
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223 redraw_man_t *rdman; |
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224 |
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225 if(!GET(self, "valid")->ToBoolean()->Value()) /* Invalidated object */ |
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226 THROW_noret("Invalid object"); |
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227 |
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228 js_rt = GET(self, "mbrt")->ToObject(); |
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229 rdman = xnjsmb_rt_rdman(js_rt); |
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230 |
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231 xnjsmb_coord_invalidate_subtree(coord); |
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232 xnjsmb_coord_free_subtree(rdman, coord); |
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233 } |
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234 |
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235 static void |
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236 _xnjsmb_coord_clone_from_subtree_mod(Handle<Object> src, Handle<Value> ret) { |
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237 Handle<Object> js_rt; |
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238 Handle<Object> ret_obj = ret->ToObject(); |
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239 |
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240 js_rt = GET(src, "mbrt")->ToObject(); |
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241 SET(ret_obj, "mbrt", js_rt); |
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242 } |
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243 |
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244 static coord_t * |
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245 xnjsmb_coord_clone_from_subtree(coord_t *coord, Handle<Object> self, |
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246 coord_t *src, const char **err) { |
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247 Handle<Object> js_rt; |
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248 redraw_man_t *rdman; |
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249 coord_t *cloning; |
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250 |
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251 js_rt = GET(self, "mbrt")->ToObject(); |
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252 ASSERT(js_rt != NULL); |
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253 rdman = xnjsmb_rt_rdman(js_rt); |
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254 |
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255 cloning = rdman_coord_clone_from_subtree(rdman, coord, src); |
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256 if(cloning == NULL) { |
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257 *err = "can not clone a subtree (allocate memory)"; |
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258 return NULL; |
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259 } |
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260 |
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261 return cloning; |
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262 } |
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263 |
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264 static void |
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265 xnjsmb_coord_show(coord_t *coord, Handle<Object> self) { |
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266 Handle<Object> js_rt; |
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267 redraw_man_t *rdman; |
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268 |
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269 js_rt = GET(self, "mbrt")->ToObject(); |
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270 ASSERT(js_rt != NULL); |
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271 rdman = xnjsmb_rt_rdman(js_rt); |
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272 |
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273 coord_show(coord); |
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274 rdman_coord_changed(rdman, coord); |
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275 } |
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276 |
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277 static void |
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278 xnjsmb_coord_hide(coord_t *coord, Handle<Object> self) { |
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279 Handle<Object> js_rt; |
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280 redraw_man_t *rdman; |
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281 |
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282 js_rt = GET(self, "mbrt")->ToObject(); |
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283 ASSERT(js_rt != NULL); |
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284 rdman = xnjsmb_rt_rdman(js_rt); |
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285 |
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286 coord_hide(coord); |
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287 rdman_coord_changed(rdman, coord); |
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288 } |
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289 |
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290 static void |
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291 xnjsmb_coord_set_opacity(Handle<Object> self, coord_t *coord, Handle<Value> value, const char **str) |
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292 { |
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293 Handle<Object> js_rt; |
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294 redraw_man_t *rdman; |
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295 |
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296 js_rt = GET(self, "mbrt")->ToObject(); |
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297 ASSERT(js_rt != NULL); |
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298 rdman = xnjsmb_rt_rdman(js_rt); |
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299 |
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300 |
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301 coord_set_opacity(coord, value->NumberValue()); |
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302 rdman_coord_changed(rdman, coord); |
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303 } |
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304 |
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305 static Handle<Value> |
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306 xnjsmb_coord_get_opacity(Handle<Object> self, coord_t *coord, |
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307 const char **err) { |
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308 float opacity; |
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309 |
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310 opacity = coord_get_opacity(coord); |
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311 return Number::New(opacity); |
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312 } |
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313 |
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314 #define cc(i) (coord_get_matrix(coord)[i]) |
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315 static void |
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316 xnjsmb_coord_set_y(Handle<Object> self, coord_t *coord, Handle<Value> value, const char **str) |
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317 { |
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318 Handle<Object> js_rt; |
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319 redraw_man_t *rdman; |
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320 co_aix y,ty; |
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321 co_aix xx,yy; |
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322 |
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323 js_rt = GET(self, "mbrt")->ToObject(); |
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324 ASSERT(js_rt != NULL); |
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325 rdman = xnjsmb_rt_rdman(js_rt); |
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326 |
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327 |
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328 ty = value->NumberValue(); |
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329 xx = GET(self,"_x")->ToNumber()->NumberValue(); |
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330 yy = GET(self,"_y")->ToNumber()->NumberValue(); |
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331 y = ty-cc(3)*xx-cc(4)*yy; |
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332 coord_get_matrix(coord)[5] = y; |
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333 rdman_coord_changed(rdman, coord); |
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334 } |
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335 |
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336 static Handle<Value> |
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337 xnjsmb_coord_get_y(Handle<Object> self, coord_t *coord, |
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338 const char **err) { |
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339 co_aix y; |
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340 co_aix xx,yy; |
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341 |
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342 xx = GET(self,"_x")->ToNumber()->NumberValue(); |
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343 yy = GET(self,"_y")->ToNumber()->NumberValue(); |
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344 |
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345 y = cc(3)*xx+cc(4)*yy+cc(5); |
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346 return Number::New(y); |
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347 } |
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348 static void |
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349 xnjsmb_coord_set_x(Handle<Object> self, coord_t *coord, Handle<Value> value, const char **str) |
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350 { |
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351 Handle<Object> js_rt; |
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352 redraw_man_t *rdman; |
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353 co_aix x,tx; |
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354 co_aix xx,yy; |
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355 |
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356 xx = GET(self,"_x")->ToNumber()->NumberValue(); |
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357 yy = GET(self,"_y")->ToNumber()->NumberValue(); |
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358 js_rt = GET(self, "mbrt")->ToObject(); |
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359 ASSERT(js_rt != NULL); |
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360 rdman = xnjsmb_rt_rdman(js_rt); |
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361 |
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362 tx = value->NumberValue(); |
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363 x = tx-cc(0)*xx-cc(1)*yy; |
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364 coord_get_matrix(coord)[2] = x; |
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365 rdman_coord_changed(rdman, coord); |
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366 } |
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367 |
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368 static Handle<Value> |
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369 xnjsmb_coord_get_x(Handle<Object> self, coord_t *coord, |
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370 const char **err) { |
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371 co_aix x; |
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372 co_aix xx,yy; |
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373 |
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374 xx = GET(self,"_x")->ToNumber()->NumberValue(); |
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375 yy = GET(self,"_y")->ToNumber()->NumberValue(); |
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376 |
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377 x = cc(0)*xx+cc(1)*yy+cc(2); |
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378 return Number::New(x); |
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379 } |
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380 #undef m |
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381 |
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382 #include "coord-inc.h" |
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383 |
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384 /*! \brief This function used by \ref xnjsmb_mb_rt to wrap coord object. |
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385 */ |
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386 Handle<Value> export_xnjsmb_auto_coord_new(coord_t *coord) { |
695 | 387 return xnjsmb_auto_coord_new(coord); |
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388 } |
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389 |
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390 /*! \brief Initialize Javascript object for root coord of a runtime. |
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391 * |
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392 * \param js_rt is the runtime object to create the root object for. |
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393 * |
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394 * After the function, js_rt.root is the object for root coord in |
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395 * Javascript. |
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396 */ |
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397 void |
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398 xnjsmb_coord_mkroot(Handle<Object> js_rt) { |
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399 redraw_man_t *rdman; |
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400 coord_t *root; |
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401 Handle<Object> obj; |
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402 static int init_flag = 0; |
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403 |
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404 if(!init_flag) { |
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405 xnjsmb_auto_coord_init(); |
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406 init_flag = 1; |
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407 } |
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408 |
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409 rdman = xnjsmb_rt_rdman(js_rt); |
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410 root = rdman_get_root(rdman); |
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411 obj = xnjsmb_auto_coord_new(root).As<Object>(); |
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412 SET(obj, "mbrt", js_rt); |
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413 |
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414 SET(js_rt, "root", obj); |
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415 } |
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416 |
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417 /* @} */ |