Mercurial > MadButterfly

annotate nodejs/coord.cc @ 776:77b561bb7929

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Implement new algorithm to calculate the origin of the SVG elemnts so that we can implement object resize without changing the position of the object. However, the image does not work here since it does not use the transformation of the group.
author wycc
date Mon, 30 Aug 2010 08:56:44 +0800
parents 13669b28826d
children 61c217f8cec8
rev   line source
557
0ca8437a91fa Implement Indexed Property interceptors
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1 #include <stdio.h>
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2 #include <v8.h>
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3
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4 extern "C" {
0ca8437a91fa Implement Indexed Property interceptors
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5 #include "mb.h"
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6 #include "mb_X_supp.h"
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7 #include "mb_tools.h"
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8 #include "X_supp_njs.h"
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9 }
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10
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11 #include "mbfly_njs.h"
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12
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13 #ifndef ASSERT
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14 #define ASSERT(x)
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15 #endif
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16
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17 #define OK 0
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18
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19 /*! \page jsgc How to Manage Life-cycle of Objects for Javascript.
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20 *
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21 * The life-cycle of MadButterfly ojects are simple. A object is live
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22 * when it is created and dead when it is free. When a coord or shape
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23 * is free, it is also removed from the tree. There is not way to
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24 * remove a coord or a shape without freeing it. So, if you want to
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25 * remove a coord or a shape object from the tree, you can only free
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26 * it.
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27 *
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28 * Javascript, in conventional, does not free an object. It has GC,
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29 * the engine, being used, will free an object if it is no more
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30 * referenced. So, we had better provide a removing function, but
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31 * actually free an object. In idea situation, a new MB object would
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32 * be created for and attached on the JS object, when an object added
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33 * back to the tree. But, it means we need to keep states of an
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34 * object and create a new one with the same states later. It is
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35 * complicated. So, once an object is removed, it is invalidated.
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36 *
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37 * I hope someone would implement a higher abstract layer, in JS, to
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38 * implement the idea model that recreate a new object when an
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39 * invalidated JS object being added back.
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40 *
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41 * An invalid object is the one with NULL internal field and obj.valid
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42 * == false. The binding of MadButterfly hold a reference to every
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43 * object added to the tree of a mbrt (runtime object), and remove the
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44 * reference and invalidate it when it being removed.
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45 *
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46 * For coords, they are always attached to the tree when it is valid.
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47 * So, binding hold a persistent reference to it. The reference is
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48 * purged when a coord being removed from the tree and being
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49 * invalidated.
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50 *
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51 * For any shape, it is not attached to the tree at begining, but is
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52 * attached to a tree laterly, or is collected by GC. The binding
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53 * hold a weak reference for a new shape, and upgrade to a strong
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54 * reference when the shape being added to the tree.
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55 */
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56
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57 using namespace v8;
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58
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b346e4699e55 Add more comment for JS binding
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59 /*! \defgroup xnjsmb_coord JS binding for coord objects.
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60 * \ingroup xnjsmb
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61 *
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62 * @{
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63 */
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64 /*! \brief Invalidate JS objects for coords and shapes in a subtree.
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65 *
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66 * \param self is the object of the root of subtree.
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67 *
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68 * \sa \ref jsgc
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69 */
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70 static void
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71 xnjsmb_coord_invalidate_subtree(coord_t *coord) {
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72 Persistent<Object> *child_hdl;
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73 Persistent<Object> *mem_hdl;
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74 coord_t *child;
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75 shape_t *mem;
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76 Handle<Value> _false = Boolean::New(0);
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77
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78 /* Invalidate all coords in the subtree */
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79 FOR_COORDS_PREORDER(coord, child) {
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80 child_hdl = (Persistent<Object> *)mb_prop_get(&child->obj.props,
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81 PROP_JSOBJ);
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82 SET(*child_hdl, "valid", _false);
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83 WRAP(*child_hdl, NULL);
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84 child_hdl->Dispose();
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85 delete child_hdl;
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86
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87 /* Invalidate members of a coord */
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88 FOR_COORD_SHAPES(child, mem) {
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89 mem_hdl = (Persistent<Object> *)mb_prop_get(&mem->obj.props,
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90 PROP_JSOBJ);
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91 SET(*mem_hdl, "valid", _false);
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92 WRAP(*mem_hdl, NULL);
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93 mem_hdl->Dispose();
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94 delete mem_hdl;
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95 }
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96 }
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97 }
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98
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99 /*! \brief Free C objects for coords and shapes in a subtree.
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100 *
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101 * \param self is the object of the root of subtree.
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102 *
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103 * \sa \ref jsgc
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104 */
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105 static void
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106 xnjsmb_coord_free_subtree(redraw_man_t *rdman, coord_t *coord) {
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107 coord_t *child, *last_child;
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108 shape_t *mem, *last_mem;
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109 int r;
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110
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111 rdman_coord_changed(rdman, coord);
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112
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113 last_child = NULL;
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114 FOR_COORDS_POSTORDER(coord, child) {
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115 if(last_child != NULL) {
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116 r = rdman_coord_free(rdman, last_child);
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117 if(r != OK)
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118 THROW_noret("Unknown error");
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119 }
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120
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121 /* Free members of a coord */
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122 last_mem = NULL;
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123 FOR_COORD_SHAPES(child, mem) {
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124 if(last_mem != NULL) {
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125 r = rdman_shape_free(rdman, last_mem);
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126 if(r != OK)
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127 THROW_noret("Unknown error");
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diff changeset
128 }
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parents: 743
diff changeset
129
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parents: 743
diff changeset
130 last_mem = mem;
741
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131 }
744
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diff changeset
132 if(last_mem != NULL) {
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diff changeset
133 r = rdman_shape_free(rdman, last_mem);
6a988e23ad2a A dirty implementation of removing subtree
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diff changeset
134 if(r != OK)
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diff changeset
135 THROW_noret("Unknown error");
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diff changeset
136 }
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Thinker K.F. Li <thinker@codemud.net>
parents: 743
diff changeset
137
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diff changeset
138 last_child = child;
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parents: 743
diff changeset
139 }
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Thinker K.F. Li <thinker@codemud.net>
parents: 743
diff changeset
140 if(last_child != NULL) {
768
13669b28826d Fix issue of memory leaking for coord objects.
Thinker K.F. Li <thinker@codemud.net>
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diff changeset
141 r = rdman_coord_free(rdman, last_child);
744
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diff changeset
142 if(r != OK)
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diff changeset
143 THROW_noret("Unknown error");
741
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144 }
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145 }
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parents: 739
diff changeset
146
680
a588eefd3f04 Refactor to xnjsmb_coord_mod().
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diff changeset
147 static void
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parents: 667
diff changeset
148 xnjsmb_coord_mod(Handle<Object> self, coord_t *coord) {
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diff changeset
149 Persistent<Object> *self_hdl;
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parents: 667
diff changeset
150 subject_t *subject;
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parents: 667
diff changeset
151 Handle<Value> subject_o;
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diff changeset
152
a588eefd3f04 Refactor to xnjsmb_coord_mod().
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153 /* Keep associated js object in property store for retrieving,
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154 * later, without create new js object.
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diff changeset
155 */
743
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diff changeset
156 self_hdl = new Persistent<Object>();
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Thinker K.F. Li <thinker@codemud.net>
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diff changeset
157 *self_hdl = Persistent<Object>::New(self);
680
a588eefd3f04 Refactor to xnjsmb_coord_mod().
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parents: 667
diff changeset
158 mb_prop_set(&coord->obj.props, PROP_JSOBJ, self_hdl);
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159
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diff changeset
160 subject = coord->mouse_event;
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diff changeset
161 subject_o = export_xnjsmb_auto_subject_new(subject);
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parents: 667
diff changeset
162 SET(self, "mouse_event", subject_o);
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163 SET(self, "valid", Boolean::New(1));
680
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164 }
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165
661
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166 static float
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diff changeset
167 coord_get_index(coord_t *coord, Handle<Object> self, int idx,
90c7726bc953 Replace part code of coord.cc by the code generated by generator
Thinker K.F. Li <thinker@branda.to>
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diff changeset
168 const char **err) {
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169 if(idx < 0 || idx >= 6) {
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170 *err = "Invalid index: out of range";
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171 return 0;
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172 }
557
0ca8437a91fa Implement Indexed Property interceptors
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173
661
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174 return coord_get_matrix(coord)[idx];
557
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parents:
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175 }
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176
661
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diff changeset
177 static float
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diff changeset
178 coord_set_index(coord_t *coord, Handle<Object> self,
90c7726bc953 Replace part code of coord.cc by the code generated by generator
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diff changeset
179 int idx, float v, const char **err) {
560
ce7a35abcb0d Function to instantiate coord for Javascript
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180 Handle<Object> js_rt;
557
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diff changeset
181 redraw_man_t *rdman;
661
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diff changeset
182
90c7726bc953 Replace part code of coord.cc by the code generated by generator
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diff changeset
183 if(idx < 0 || idx >= 6) {
90c7726bc953 Replace part code of coord.cc by the code generated by generator
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diff changeset
184 *err = "Invalid index: out of range";
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diff changeset
185 return 0;
90c7726bc953 Replace part code of coord.cc by the code generated by generator
Thinker K.F. Li <thinker@branda.to>
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186 }
557
0ca8437a91fa Implement Indexed Property interceptors
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parents:
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187
661
90c7726bc953 Replace part code of coord.cc by the code generated by generator
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diff changeset
188 coord_get_matrix(coord)[idx] = v;
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diff changeset
189
560
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parents: 557
diff changeset
190 js_rt = GET(self, "mbrt")->ToObject();
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Thinker K.F. Li <thinker@branda.to>
parents: 557
diff changeset
191 rdman = xnjsmb_rt_rdman(js_rt);
557
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Thinker K.F. Li <thinker@branda.to>
parents:
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192 rdman_coord_changed(rdman, coord);
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193
661
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diff changeset
194 return v;
557
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parents:
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195 }
560
ce7a35abcb0d Function to instantiate coord for Javascript
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parents: 557
diff changeset
196
661
90c7726bc953 Replace part code of coord.cc by the code generated by generator
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diff changeset
197 static void
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198 xnjsmb_coord_add_shape(coord_t *coord, Handle<Object> self,
90c7726bc953 Replace part code of coord.cc by the code generated by generator
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parents: 566
diff changeset
199 shape_t *shape, const char **err) {
90c7726bc953 Replace part code of coord.cc by the code generated by generator
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diff changeset
200 Handle<Object> js_rt;
748
56a5e08cd8af Make shapes can be removed from the tree
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diff changeset
201 Persistent<Object> *shape_hdl;
566
6639d386db78 Function of add a shape to a coord in Javascript.
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parents: 563
diff changeset
202 redraw_man_t *rdman;
6639d386db78 Function of add a shape to a coord in Javascript.
Thinker K.F. Li <thinker@branda.to>
parents: 563
diff changeset
203 int r;
6639d386db78 Function of add a shape to a coord in Javascript.
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parents: 563
diff changeset
204
661
90c7726bc953 Replace part code of coord.cc by the code generated by generator
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diff changeset
205 js_rt = GET(self, "mbrt")->ToObject();
90c7726bc953 Replace part code of coord.cc by the code generated by generator
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parents: 566
diff changeset
206 rdman = xnjsmb_rt_rdman(js_rt);
90c7726bc953 Replace part code of coord.cc by the code generated by generator
Thinker K.F. Li <thinker@branda.to>
parents: 566
diff changeset
207 r = rdman_add_shape(rdman, shape, coord);
566
6639d386db78 Function of add a shape to a coord in Javascript.
Thinker K.F. Li <thinker@branda.to>
parents: 563
diff changeset
208 if(r != 0)
661
90c7726bc953 Replace part code of coord.cc by the code generated by generator
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parents: 566
diff changeset
209 *err = "Unknown error";
748
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diff changeset
210
56a5e08cd8af Make shapes can be removed from the tree
Thinker K.F. Li <thinker@codemud.net>
parents: 746
diff changeset
211 /* see \ref jsgc */
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Thinker K.F. Li <thinker@codemud.net>
parents: 746
diff changeset
212 shape_hdl = (Persistent<Object> *)mb_prop_get(&shape->obj.props,
56a5e08cd8af Make shapes can be removed from the tree
Thinker K.F. Li <thinker@codemud.net>
parents: 746
diff changeset
213 PROP_JSOBJ);
56a5e08cd8af Make shapes can be removed from the tree
Thinker K.F. Li <thinker@codemud.net>
parents: 746
diff changeset
214 shape_hdl->ClearWeak();
566
6639d386db78 Function of add a shape to a coord in Javascript.
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parents: 563
diff changeset
215 }
6639d386db78 Function of add a shape to a coord in Javascript.
Thinker K.F. Li <thinker@branda.to>
parents: 563
diff changeset
216
741
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parents: 739
diff changeset
217 static void
745
4ccb0553e804 Refactor code of free C objects into xnjsmb_coord_free_subtree
Thinker K.F. Li <thinker@codemud.net>
parents: 744
diff changeset
218 xnjsmb_coord_remove(coord_t *coord, Handle<Object> self) {
4ccb0553e804 Refactor code of free C objects into xnjsmb_coord_free_subtree
Thinker K.F. Li <thinker@codemud.net>
parents: 744
diff changeset
219 Handle<Object> js_rt;
4ccb0553e804 Refactor code of free C objects into xnjsmb_coord_free_subtree
Thinker K.F. Li <thinker@codemud.net>
parents: 744
diff changeset
220 redraw_man_t *rdman;
4ccb0553e804 Refactor code of free C objects into xnjsmb_coord_free_subtree
Thinker K.F. Li <thinker@codemud.net>
parents: 744
diff changeset
221
4ccb0553e804 Refactor code of free C objects into xnjsmb_coord_free_subtree
Thinker K.F. Li <thinker@codemud.net>
parents: 744
diff changeset
222 if(!GET(self, "valid")->ToBoolean()->Value()) /* Invalidated object */
4ccb0553e804 Refactor code of free C objects into xnjsmb_coord_free_subtree
Thinker K.F. Li <thinker@codemud.net>
parents: 744
diff changeset
223 THROW_noret("Invalid object");
4ccb0553e804 Refactor code of free C objects into xnjsmb_coord_free_subtree
Thinker K.F. Li <thinker@codemud.net>
parents: 744
diff changeset
224
4ccb0553e804 Refactor code of free C objects into xnjsmb_coord_free_subtree
Thinker K.F. Li <thinker@codemud.net>
parents: 744
diff changeset
225 js_rt = GET(self, "mbrt")->ToObject();
4ccb0553e804 Refactor code of free C objects into xnjsmb_coord_free_subtree
Thinker K.F. Li <thinker@codemud.net>
parents: 744
diff changeset
226 rdman = xnjsmb_rt_rdman(js_rt);
4ccb0553e804 Refactor code of free C objects into xnjsmb_coord_free_subtree
Thinker K.F. Li <thinker@codemud.net>
parents: 744
diff changeset
227
4ccb0553e804 Refactor code of free C objects into xnjsmb_coord_free_subtree
Thinker K.F. Li <thinker@codemud.net>
parents: 744
diff changeset
228 xnjsmb_coord_invalidate_subtree(coord);
4ccb0553e804 Refactor code of free C objects into xnjsmb_coord_free_subtree
Thinker K.F. Li <thinker@codemud.net>
parents: 744
diff changeset
229 xnjsmb_coord_free_subtree(rdman, coord);
741
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diff changeset
230 }
d8764f10e141 Remove a coord from the tree in JS
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parents: 739
diff changeset
231
749
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Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
232 static void
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
233 xnjsmb_coord_show(coord_t *coord, Handle<Object> self) {
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
234 Handle<Object> js_rt;
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
235 redraw_man_t *rdman;
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
236
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
237 js_rt = GET(self, "mbrt")->ToObject();
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
238 ASSERT(js_rt != NULL);
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
239 rdman = xnjsmb_rt_rdman(js_rt);
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
240
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
241 coord_show(coord);
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
242 rdman_coord_changed(rdman, coord);
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
243 }
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
244
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
245 static void
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
246 xnjsmb_coord_hide(coord_t *coord, Handle<Object> self) {
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
247 Handle<Object> js_rt;
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
248 redraw_man_t *rdman;
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
249
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
250 js_rt = GET(self, "mbrt")->ToObject();
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
251 ASSERT(js_rt != NULL);
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
252 rdman = xnjsmb_rt_rdman(js_rt);
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
253
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
254 coord_hide(coord);
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
255 rdman_coord_changed(rdman, coord);
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
256 }
ed59e659a202 Implement binding for hide/show for shapes and coords
Thinker K.F. Li <thinker@codemud.net>
parents: 748
diff changeset
257
661
90c7726bc953 Replace part code of coord.cc by the code generated by generator
Thinker K.F. Li <thinker@branda.to>
parents: 566
diff changeset
258 #include "coord-inc.h"
562
1b6402f07cd4 Make root coord availabe for Javascript code
Thinker K.F. Li <thinker@branda.to>
parents: 560
diff changeset
259
684
b346e4699e55 Add more comment for JS binding
Thinker K.F. Li <thinker@branda.to>
parents: 680
diff changeset
260 /*! \brief This function used by \ref xnjsmb_mb_rt to wrap coord object.
b346e4699e55 Add more comment for JS binding
Thinker K.F. Li <thinker@branda.to>
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261 */
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262 Handle<Value> export_xnjsmb_auto_coord_new(coord_t *coord) {
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263 return xnjsmb_auto_coord_new(coord);
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264 }
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265
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266 /*! \brief Initialize Javascript object for root coord of a runtime.
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267 *
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268 * \param js_rt is the runtime object to create the root object for.
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269 *
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270 * After the function, js_rt.root is the object for root coord in
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271 * Javascript.
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272 */
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273 void
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274 xnjsmb_coord_mkroot(Handle<Object> js_rt) {
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275 redraw_man_t *rdman;
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276 coord_t *root;
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277 Handle<Object> obj;
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278 static int init_flag = 0;
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279
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280 if(!init_flag) {
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281 xnjsmb_auto_coord_init();
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282 init_flag = 1;
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283 }
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284
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285 rdman = xnjsmb_rt_rdman(js_rt);
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286 root = rdman_get_root(rdman);
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287 obj = xnjsmb_auto_coord_new(root).As<Object>();
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288 SET(obj, "mbrt", js_rt);
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289
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290 SET(js_rt, "root", obj);
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291 }
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292
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293 /* @} */