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1 /**************************************************************************** |
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2 ** |
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3 ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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4 ** All rights reserved. |
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5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
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6 ** |
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7 ** This file is part of the examples of the Qt Toolkit. |
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8 ** |
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9 ** $QT_BEGIN_LICENSE:LGPL$ |
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10 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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15 ** |
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16 ** GNU Lesser General Public License Usage |
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17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
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18 ** General Public License version 2.1 as published by the Free Software |
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19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
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20 ** packaging of this file. Please review the following information to |
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21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
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22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
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23 ** |
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24 ** In addition, as a special exception, Nokia gives you certain additional |
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25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
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26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
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27 ** |
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28 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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38 ** $QT_END_LICENSE$ |
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39 ** |
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40 ****************************************************************************/ |
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41 |
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42 #include "environment.h" |
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43 #include "qcontext2dcanvas.h" |
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44 #include "context2d.h" |
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45 #include <QScriptValueIterator> |
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46 #include <QDateTime> |
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47 |
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48 struct FakeDomEvent |
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49 { |
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50 enum KeyCodes { |
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51 DOM_VK_UNDEFINED = 0x0, |
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52 DOM_VK_RIGHT_ALT = 0x12, |
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53 DOM_VK_LEFT_ALT = 0x12, |
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54 DOM_VK_LEFT_CONTROL = 0x11, |
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55 DOM_VK_RIGHT_CONTROL = 0x11, |
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56 DOM_VK_LEFT_SHIFT = 0x10, |
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57 DOM_VK_RIGHT_SHIFT = 0x10, |
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58 DOM_VK_META = 0x9D, |
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59 DOM_VK_BACK_SPACE = 0x08, |
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60 DOM_VK_CAPS_LOCK = 0x14, |
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61 DOM_VK_DELETE = 0x7F, |
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62 DOM_VK_END = 0x23, |
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63 DOM_VK_ENTER = 0x0D, |
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64 DOM_VK_ESCAPE = 0x1B, |
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65 DOM_VK_HOME = 0x24, |
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66 DOM_VK_NUM_LOCK = 0x90, |
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67 DOM_VK_PAUSE = 0x13, |
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68 DOM_VK_PRINTSCREEN = 0x9A, |
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69 DOM_VK_SCROLL_LOCK = 0x91, |
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70 DOM_VK_SPACE = 0x20, |
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71 DOM_VK_TAB = 0x09, |
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72 DOM_VK_LEFT = 0x25, |
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73 DOM_VK_RIGHT = 0x27, |
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74 DOM_VK_UP = 0x26, |
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75 DOM_VK_DOWN = 0x28, |
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76 DOM_VK_PAGE_DOWN = 0x22, |
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77 DOM_VK_PAGE_UP = 0x21, |
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78 DOM_VK_F1 = 0x70, |
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79 DOM_VK_F2 = 0x71, |
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80 DOM_VK_F3 = 0x72, |
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81 DOM_VK_F4 = 0x73, |
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82 DOM_VK_F5 = 0x74, |
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83 DOM_VK_F6 = 0x75, |
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84 DOM_VK_F7 = 0x76, |
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85 DOM_VK_F8 = 0x77, |
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86 DOM_VK_F9 = 0x78, |
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87 DOM_VK_F10 = 0x79, |
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88 DOM_VK_F11 = 0x7A, |
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89 DOM_VK_F12 = 0x7B, |
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90 DOM_VK_F13 = 0xF000, |
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91 DOM_VK_F14 = 0xF001, |
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92 DOM_VK_F15 = 0xF002, |
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93 DOM_VK_F16 = 0xF003, |
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94 DOM_VK_F17 = 0xF004, |
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95 DOM_VK_F18 = 0xF005, |
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96 DOM_VK_F19 = 0xF006, |
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97 DOM_VK_F20 = 0xF007, |
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98 DOM_VK_F21 = 0xF008, |
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99 DOM_VK_F22 = 0xF009, |
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100 DOM_VK_F23 = 0xF00A, |
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101 DOM_VK_F24 = 0xF00B |
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102 }; |
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103 |
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104 static int qtToDomKey(int keyCode); |
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105 }; |
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106 |
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107 int FakeDomEvent::qtToDomKey(int keyCode) |
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108 { |
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109 switch (keyCode) { |
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110 case Qt::Key_Backspace: |
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111 return DOM_VK_BACK_SPACE; |
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112 case Qt::Key_Enter: |
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113 return DOM_VK_ENTER; |
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114 case Qt::Key_Return: |
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115 return DOM_VK_ENTER; |
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116 case Qt::Key_NumLock: |
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117 return DOM_VK_NUM_LOCK; |
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118 case Qt::Key_Alt: |
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119 return DOM_VK_RIGHT_ALT; |
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120 case Qt::Key_Control: |
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121 return DOM_VK_LEFT_CONTROL; |
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122 case Qt::Key_Shift: |
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123 return DOM_VK_LEFT_SHIFT; |
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124 case Qt::Key_Meta: |
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125 return DOM_VK_META; |
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126 case Qt::Key_CapsLock: |
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127 return DOM_VK_CAPS_LOCK; |
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128 case Qt::Key_Delete: |
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129 return DOM_VK_DELETE; |
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130 case Qt::Key_End: |
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131 return DOM_VK_END; |
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132 case Qt::Key_Escape: |
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133 return DOM_VK_ESCAPE; |
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134 case Qt::Key_Home: |
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135 return DOM_VK_HOME; |
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136 case Qt::Key_Pause: |
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137 return DOM_VK_PAUSE; |
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138 case Qt::Key_Print: |
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139 return DOM_VK_PRINTSCREEN; |
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140 case Qt::Key_ScrollLock: |
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141 return DOM_VK_SCROLL_LOCK; |
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142 case Qt::Key_Left: |
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143 return DOM_VK_LEFT; |
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144 case Qt::Key_Right: |
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145 return DOM_VK_RIGHT; |
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146 case Qt::Key_Up: |
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147 return DOM_VK_UP; |
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148 case Qt::Key_Down: |
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149 return DOM_VK_DOWN; |
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150 case Qt::Key_PageDown: |
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151 return DOM_VK_PAGE_DOWN; |
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152 case Qt::Key_PageUp: |
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153 return DOM_VK_PAGE_UP; |
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154 case Qt::Key_F1: |
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155 return DOM_VK_F1; |
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156 case Qt::Key_F2: |
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157 return DOM_VK_F2; |
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158 case Qt::Key_F3: |
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159 return DOM_VK_F3; |
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160 case Qt::Key_F4: |
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161 return DOM_VK_F4; |
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162 case Qt::Key_F5: |
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163 return DOM_VK_F5; |
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164 case Qt::Key_F6: |
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165 return DOM_VK_F6; |
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166 case Qt::Key_F7: |
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167 return DOM_VK_F7; |
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168 case Qt::Key_F8: |
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169 return DOM_VK_F8; |
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170 case Qt::Key_F9: |
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171 return DOM_VK_F9; |
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172 case Qt::Key_F10: |
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173 return DOM_VK_F10; |
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174 case Qt::Key_F11: |
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175 return DOM_VK_F11; |
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176 case Qt::Key_F12: |
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177 return DOM_VK_F12; |
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178 case Qt::Key_F13: |
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179 return DOM_VK_F13; |
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180 case Qt::Key_F14: |
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181 return DOM_VK_F14; |
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182 case Qt::Key_F15: |
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183 return DOM_VK_F15; |
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184 case Qt::Key_F16: |
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185 return DOM_VK_F16; |
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186 case Qt::Key_F17: |
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187 return DOM_VK_F17; |
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188 case Qt::Key_F18: |
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189 return DOM_VK_F18; |
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190 case Qt::Key_F19: |
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191 return DOM_VK_F19; |
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192 case Qt::Key_F20: |
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193 return DOM_VK_F20; |
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194 case Qt::Key_F21: |
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195 return DOM_VK_F21; |
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196 case Qt::Key_F22: |
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197 return DOM_VK_F22; |
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198 case Qt::Key_F23: |
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199 return DOM_VK_F23; |
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200 case Qt::Key_F24: |
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201 return DOM_VK_F24; |
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202 } |
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203 return keyCode; |
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204 } |
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205 |
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206 //! [0] |
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207 Environment::Environment(QObject *parent) |
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208 : QObject(parent) |
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209 { |
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210 m_engine = new QScriptEngine(this); |
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211 |
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212 m_document = m_engine->newQObject( |
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213 new Document(this), QScriptEngine::QtOwnership, |
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214 QScriptEngine::ExcludeSuperClassContents); |
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215 |
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216 CanvasGradientPrototype::setup(m_engine); |
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217 |
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218 m_originalGlobalObject = m_engine->globalObject(); |
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219 reset(); |
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220 } |
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221 //! [0] |
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222 |
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223 Environment::~Environment() |
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224 { |
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225 } |
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226 |
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227 QScriptEngine *Environment::engine() const |
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228 { |
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229 return m_engine; |
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230 } |
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231 |
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232 QScriptValue Environment::document() const |
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233 { |
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234 return m_document; |
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235 } |
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236 |
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237 int Environment::setTimeout(const QScriptValue &expression, int delay) |
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238 { |
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239 if (expression.isString() || expression.isFunction()) { |
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240 int timerId = startTimer(delay); |
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241 m_timeoutHash.insert(timerId, expression); |
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242 return timerId; |
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243 } |
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244 return -1; |
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245 } |
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246 |
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247 void Environment::clearTimeout(int timerId) |
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248 { |
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249 killTimer(timerId); |
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250 m_timeoutHash.remove(timerId); |
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251 } |
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252 |
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253 //! [1] |
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254 int Environment::setInterval(const QScriptValue &expression, int delay) |
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255 { |
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256 if (expression.isString() || expression.isFunction()) { |
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257 int timerId = startTimer(delay); |
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258 m_intervalHash.insert(timerId, expression); |
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259 return timerId; |
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260 } |
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261 return -1; |
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262 } |
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263 |
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264 void Environment::clearInterval(int timerId) |
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265 { |
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266 killTimer(timerId); |
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267 m_intervalHash.remove(timerId); |
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268 } |
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269 |
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270 void Environment::timerEvent(QTimerEvent *event) |
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271 { |
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272 int id = event->timerId(); |
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273 QScriptValue expression = m_intervalHash.value(id); |
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274 if (!expression.isValid()) { |
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275 expression = m_timeoutHash.value(id); |
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276 if (expression.isValid()) |
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277 killTimer(id); |
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278 } |
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279 if (expression.isString()) { |
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280 evaluate(expression.toString()); |
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281 } else if (expression.isFunction()) { |
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282 expression.call(); |
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283 } |
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284 maybeEmitScriptError(); |
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285 } |
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286 //! [1] |
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287 |
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288 //! [5] |
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289 void Environment::addCanvas(QContext2DCanvas *canvas) |
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290 { |
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291 m_canvases.append(canvas); |
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292 } |
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293 |
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294 QContext2DCanvas *Environment::canvasByName(const QString &name) const |
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295 { |
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296 for (int i = 0; i < m_canvases.size(); ++i) { |
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297 QContext2DCanvas *canvas = m_canvases.at(i); |
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298 if (canvas->objectName() == name) |
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299 return canvas; |
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300 } |
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301 return 0; |
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302 } |
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303 //! [5] |
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304 |
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305 QList<QContext2DCanvas*> Environment::canvases() const |
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306 { |
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307 return m_canvases; |
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308 } |
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309 |
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310 void Environment::reset() |
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311 { |
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312 if (m_engine->isEvaluating()) |
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313 m_engine->abortEvaluation(); |
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314 |
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315 { |
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316 QHash<int, QScriptValue>::const_iterator it; |
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317 for (it = m_intervalHash.constBegin(); it != m_intervalHash.constEnd(); ++it) |
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318 killTimer(it.key()); |
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319 m_intervalHash.clear(); |
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320 for (it = m_timeoutHash.constBegin(); it != m_timeoutHash.constEnd(); ++it) |
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321 killTimer(it.key()); |
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322 m_timeoutHash.clear(); |
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323 } |
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324 |
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325 for (int i = 0; i < m_canvases.size(); ++i) |
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326 m_canvases.at(i)->reset(); |
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327 |
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328 QScriptValue self = m_engine->newQObject( |
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329 this, QScriptEngine::QtOwnership, |
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330 QScriptEngine::ExcludeSuperClassContents); |
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331 |
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332 { |
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333 QScriptValueIterator it(m_originalGlobalObject); |
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334 while (it.hasNext()) { |
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335 it.next(); |
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336 self.setProperty(it.scriptName(), it.value(), it.flags()); |
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337 } |
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338 } |
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339 |
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340 self.setProperty("self", self); |
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341 self.setProperty("window", self); |
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342 |
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343 QScriptValue navigator = m_engine->newObject(); |
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344 navigator.setProperty("appCodeName", "context2d"); |
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345 navigator.setProperty("appMinorVersion", 1); |
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346 navigator.setProperty("appVersion", 1); |
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347 navigator.setProperty("browserLanguage", "en_US"); |
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348 navigator.setProperty("cookieEnabled", false); |
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349 navigator.setProperty("cpuClass", "i686"); |
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350 navigator.setProperty("onLine", false); |
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351 navigator.setProperty("platform", "bogus OS"); |
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352 navigator.setProperty("systemLanguage", "en_US"); |
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353 navigator.setProperty("userAgent", "Context2D/1.1"); |
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354 navigator.setProperty("userLanguage", "en_US"); |
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355 self.setProperty("navigator", navigator); |
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356 |
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357 m_engine->setGlobalObject(self); |
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358 |
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359 m_engine->collectGarbage(); |
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360 } |
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361 |
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362 QScriptValue Environment::evaluate(const QString &code, const QString &fileName) |
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363 { |
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364 return m_engine->evaluate(code, fileName); |
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365 } |
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366 |
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367 //! [2] |
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368 QScriptValue Environment::toWrapper(QObject *object) |
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369 { |
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370 return m_engine->newQObject(object, QScriptEngine::QtOwnership, |
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371 QScriptEngine::PreferExistingWrapperObject |
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372 | QScriptEngine::ExcludeSuperClassContents); |
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373 } |
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374 //! [2] |
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375 |
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376 //! [3] |
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377 void Environment::handleEvent(QContext2DCanvas *canvas, QMouseEvent *e) |
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378 { |
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379 QString type; |
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380 switch (e->type()) { |
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381 case QEvent::MouseButtonPress: |
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382 type = "mousedown"; break; |
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383 case QEvent::MouseButtonRelease: |
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384 type = "mouseup"; break; |
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385 case QEvent::MouseMove: |
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386 type = "mousemove"; break; |
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387 default: break; |
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388 } |
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389 if (type.isEmpty()) |
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390 return; |
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391 |
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392 QScriptValue handlerObject; |
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393 QScriptValue handler = eventHandler(canvas, type, &handlerObject); |
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394 if (!handler.isFunction()) |
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395 return; |
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396 |
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397 QScriptValue scriptEvent = newFakeDomEvent(type, toWrapper(canvas)); |
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398 // MouseEvent |
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399 scriptEvent.setProperty("screenX", e->globalX(), QScriptValue::ReadOnly); |
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400 scriptEvent.setProperty("screenY", e->globalY(), QScriptValue::ReadOnly); |
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401 scriptEvent.setProperty("clientX", e->x(), QScriptValue::ReadOnly); |
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402 scriptEvent.setProperty("clientY", e->y(), QScriptValue::ReadOnly); |
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403 scriptEvent.setProperty("layerX", e->x(), QScriptValue::ReadOnly); |
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404 scriptEvent.setProperty("layerY", e->y(), QScriptValue::ReadOnly); |
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405 scriptEvent.setProperty("pageX", e->x(), QScriptValue::ReadOnly); |
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406 scriptEvent.setProperty("pageY", e->y(), QScriptValue::ReadOnly); |
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407 scriptEvent.setProperty("altKey", (e->modifiers() & Qt::AltModifier) != 0, |
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408 QScriptValue::ReadOnly); |
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409 scriptEvent.setProperty("ctrlKey", (e->modifiers() & Qt::ControlModifier) != 0, |
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410 QScriptValue::ReadOnly); |
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411 scriptEvent.setProperty("metaKey", (e->modifiers() & Qt::MetaModifier) != 0, |
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412 QScriptValue::ReadOnly); |
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413 scriptEvent.setProperty("shiftKey", (e->modifiers() & Qt::ShiftModifier) != 0, |
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414 QScriptValue::ReadOnly); |
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415 int button = 0; |
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416 if (e->button() == Qt::RightButton) |
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417 button = 2; |
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418 else if (e->button() == Qt::MidButton) |
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419 button = 1; |
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420 scriptEvent.setProperty("button", button); |
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421 scriptEvent.setProperty("relatedTarget", m_engine->nullValue(), |
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422 QScriptValue::ReadOnly); |
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423 handler.call(handlerObject, QScriptValueList() << scriptEvent); |
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424 maybeEmitScriptError(); |
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425 } |
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426 //! [3] |
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427 |
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428 void Environment::handleEvent(QContext2DCanvas *canvas, QKeyEvent *e) |
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429 { |
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430 QString type; |
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431 switch (e->type()) { |
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432 case QEvent::KeyPress: |
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433 type = "keydown"; break; |
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434 case QEvent::KeyRelease: |
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435 type = "keyup"; break; |
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436 default: break; |
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437 } |
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438 if (type.isEmpty()) |
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439 return; |
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440 |
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441 QScriptValue handlerObject; |
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442 QScriptValue handler = eventHandler(canvas, type, &handlerObject); |
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443 if (!handler.isFunction()) |
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444 return; |
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445 |
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446 QScriptValue scriptEvent = newFakeDomEvent(type, toWrapper(canvas)); |
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447 // KeyEvent |
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448 scriptEvent.setProperty("isChar", !e->text().isEmpty()); |
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449 scriptEvent.setProperty("charCode", e->text()); |
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450 scriptEvent.setProperty("keyCode", FakeDomEvent::qtToDomKey(e->key())); |
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451 scriptEvent.setProperty("which", e->key()); |
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452 |
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453 handler.call(handlerObject, QScriptValueList() << scriptEvent); |
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454 maybeEmitScriptError(); |
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455 } |
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456 |
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457 QScriptValue Environment::eventHandler(QContext2DCanvas *canvas, const QString &type, |
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458 QScriptValue *who) |
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459 { |
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460 QString handlerName = "on" + type; |
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461 QScriptValue obj = toWrapper(canvas); |
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462 QScriptValue handler = obj.property(handlerName); |
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463 if (!handler.isValid()) { |
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464 obj = m_document; |
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465 handler = obj.property(handlerName); |
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466 } |
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467 if (who && handler.isFunction()) |
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468 *who = obj; |
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469 return handler; |
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470 } |
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471 |
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472 //! [4] |
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473 QScriptValue Environment::newFakeDomEvent(const QString &type, const QScriptValue &target) |
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474 { |
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475 QScriptValue e = m_engine->newObject(); |
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476 // Event |
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477 e.setProperty("type", type, QScriptValue::ReadOnly); |
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478 e.setProperty("bubbles", true, QScriptValue::ReadOnly); |
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479 e.setProperty("cancelable", false, QScriptValue::ReadOnly); |
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480 e.setProperty("target", target, QScriptValue::ReadOnly); |
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481 e.setProperty("currentTarget", target, QScriptValue::ReadOnly); |
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482 e.setProperty("eventPhase", 3); // bubbling |
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483 e.setProperty("timeStamp", QDateTime::currentDateTime().toTime_t()); |
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484 // UIEvent |
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485 e.setProperty("detail", 0, QScriptValue::ReadOnly); |
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486 e.setProperty("view", m_engine->globalObject(), QScriptValue::ReadOnly); |
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487 return e; |
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488 } |
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489 //! [4] |
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490 |
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491 void Environment::maybeEmitScriptError() |
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492 { |
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493 if (m_engine->hasUncaughtException()) |
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494 emit scriptError(m_engine->uncaughtException()); |
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495 } |
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496 |
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497 |
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498 Document::Document(Environment *env) |
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499 : QObject(env) |
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500 { |
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501 } |
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502 |
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503 Document::~Document() |
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504 { |
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505 } |
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506 |
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507 QScriptValue Document::getElementById(const QString &id) const |
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508 { |
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509 Environment *env = qobject_cast<Environment*>(parent()); |
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510 QContext2DCanvas *canvas = env->canvasByName(id); |
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511 if (!canvas) |
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512 return QScriptValue(); |
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513 return env->toWrapper(canvas); |
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514 } |
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515 |
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516 QScriptValue Document::getElementsByTagName(const QString &name) const |
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517 { |
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518 if (name != "canvas") |
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519 return QScriptValue(); |
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520 Environment *env = qobject_cast<Environment*>(parent()); |
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521 QList<QContext2DCanvas*> list = env->canvases(); |
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522 QScriptValue result = env->engine()->newArray(list.size()); |
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523 for (int i = 0; i < list.size(); ++i) |
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524 result.setProperty(i, env->toWrapper(list.at(i))); |
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525 return result; |
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526 } |
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527 |
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528 void Document::addEventListener(const QString &type, const QScriptValue &listener, |
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529 bool useCapture) |
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530 { |
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531 Q_UNUSED(useCapture); |
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532 if (listener.isFunction()) { |
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533 Environment *env = qobject_cast<Environment*>(parent()); |
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534 QScriptValue self = env->toWrapper(this); |
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535 self.setProperty("on" + type, listener); |
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536 } |
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537 } |
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538 |
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539 |
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540 QColor colorFromString(const QString &name); |
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541 |
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542 CanvasGradientPrototype::CanvasGradientPrototype(QObject *parent) |
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543 : QObject(parent) |
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544 { |
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545 } |
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546 |
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547 void CanvasGradientPrototype::addColorStop(qreal offset, const QString &color) |
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548 { |
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549 CanvasGradient *self = qscriptvalue_cast<CanvasGradient*>(thisObject()); |
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550 if (!self || (self->value.type() == QGradient::NoGradient)) |
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551 return; |
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552 self->value.setColorAt(offset, colorFromString(color)); |
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553 } |
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554 |
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555 void CanvasGradientPrototype::setup(QScriptEngine *engine) |
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556 { |
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557 CanvasGradientPrototype *proto = new CanvasGradientPrototype(); |
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558 engine->setDefaultPrototype(qMetaTypeId<CanvasGradient>(), |
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559 engine->newQObject(proto, QScriptEngine::ScriptOwnership, |
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560 QScriptEngine::ExcludeSuperClassContents)); |
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561 } |