1 | |
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2 | <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
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3 | <html xmlns="http://www.w3.org/1999/xhtml"> |
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4 | <head> |
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5 | <title>Testcase</title> |
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6 | <style type="text/css"> |
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7 | #ourmenu { |
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8 | position:absolute; |
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9 | width:165px; |
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10 | border:2px solid black; |
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11 | background-color:menu; |
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12 | z-index:100; |
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13 | visibility:hidden; |
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14 | } |
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15 | |
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16 | </style> |
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17 | <script type="text/javascript"> |
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18 | |
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19 | // Script initialization, this is the special part for Opera, taking care to raise our custom |
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20 | // oncontextmenu event. |
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21 | (function(){ |
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22 | |
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23 | if ( 'oncontextmenu' in document.createElement('foo') ) |
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24 | //contextmenu supported - nothing to do |
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25 | return; |
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26 | |
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27 | function dispatchCtxMenuEvent(e,evType){ |
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28 | var doc = e.target.ownerDocument||(e.view?e.view.document:null)||e.target; |
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29 | var newEv = doc.createEvent('MouseEvent'); |
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30 | newEv.initMouseEvent(evType||'contextmenu', true, true, doc.defaultView, e.detail, |
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31 | e.screenX, e.screenY, e.clientX, e.clientY, e.ctrlKey, e.altKey, |
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32 | e.shiftKey, e.metaKey, e.button, e.relatedTarget); |
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33 | newEv.synthetic = true; |
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34 | e.target.dispatchEvent(newEv); |
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35 | }; |
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36 | |
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37 | |
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38 | //contextmenu must be fired on mousedown if we want to cancel the menu |
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39 | addEventListener('mousedown',function(e){ |
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40 | //right-click doesn't fire click event. Only mouseup |
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41 | if( e && e.button == 2 ){ |
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42 | cancelMenu(e); |
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43 | return false; |
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44 | } |
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45 | },true); |
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46 | |
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47 | var overrideButton; |
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48 | function cancelMenu(e){ |
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49 | if(!overrideButton){ |
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50 | var doc = e.target.ownerDocument; |
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51 | overrideButton = doc.createElement('input'); |
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52 | overrideButton.type='button'; |
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53 | (doc.body||doc.documentElement).appendChild(overrideButton); |
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54 | } |
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55 | overrideButton.style='position:absolute;top:'+(e.clientY-2)+'px;left:'+(e.clientX-2)+'px;width:5px;height:5px;opacity:0.01'; |
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56 | } |
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57 | |
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58 | addEventListener('mouseup',function(e){ |
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59 | if(overrideButton){ |
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60 | overrideButton.parentNode.removeChild(overrideButton); |
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61 | overrideButton = undefined; |
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62 | } |
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63 | if( e && e.button == 2 ){ |
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64 | dispatchCtxMenuEvent(e, 'contextmenu'); |
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65 | return false; |
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66 | } |
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67 | },true); |
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68 | |
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69 | })( true, 1000 ); |
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70 | |
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71 | </script> |
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72 | </head> |
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73 | <body> |
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74 | <h1>Using our context menu in Opera</h1> |
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75 | <hr /> |
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76 | <p>Test page.<br> |
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77 | In this page Opera shouldn't show its normal context menu, and instead use only our own code</p> |
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78 | <p>In order to debug something in Opera, remember to use Opera.postError()<br> |
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79 | I've only bothered to make it work in Opera, as we know that the rest of the browsers handle the |
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80 | oncontextmenu event and it can be cancelled properly</p> |
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81 | <h1>Important</h1> |
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82 | <p>To be able to test the page you must have javascript enabled and in the preferences, advanced, |
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83 | content, javascript options, "Allow script to receive right clicks" must be checked (it's off by |
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84 | default) |
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85 | </p> |
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86 | <p>This script only takes care of the context menu generated by the mouse. The keyboard won't be affected.</p> |
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87 | <p>We listen to the event with " addEventListener('contextmenu', showmenu, false);". It's possible to make it work |
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88 | also with "oncontextmenu = showmenu ;", but I don't think that we need to care about that.</p> |
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89 | |
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90 | <div id="ourmenu"> |
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91 | This is the content of the context menu<br> |
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92 | <br><br><br><br><br> |
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93 | </div> |
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94 | |
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95 | <script type="text/javascript"> |
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96 | |
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97 | var menuobj=document.getElementById("ourmenu") |
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98 | |
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99 | function showmenu(e){ |
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100 | |
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101 | // boring stuff to show the div... |
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102 | //Find out how close the mouse is to the corner of the window |
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103 | var rightedge=window.innerWidth-e.clientX |
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104 | var bottomedge=window.innerHeight-e.clientY |
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105 | |
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106 | //if the horizontal distance isn't enough to accomodate the width of the context menu |
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107 | if (rightedge<menuobj.offsetWidth) |
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108 | //move the horizontal position of the menu to the left by it's width |
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109 | menuobj.style.left= window.pageXOffset+e.clientX-menuobj.offsetWidth |
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110 | else |
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111 | //position the horizontal position of the menu where the mouse was clicked |
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112 | menuobj.style.left=window.pageXOffset+e.clientX |
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113 | |
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114 | //same concept with the vertical position |
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115 | if (bottomedge<menuobj.offsetHeight) |
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116 | menuobj.style.top=window.pageYOffset+e.clientY-menuobj.offsetHeight |
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117 | else |
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118 | menuobj.style.top=window.pageYOffset+e.clientY |
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119 | |
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120 | menuobj.style.visibility="visible" |
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121 | // end of boring stuff |
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122 | |
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123 | return false ; |
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124 | } |
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125 | |
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126 | function hidemenu(e){ |
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127 | menuobj.style.visibility="hidden" ; |
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128 | } |
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129 | |
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130 | //document.oncontextmenu = showmenu ; |
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131 | document.addEventListener('contextmenu', showmenu, false); |
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132 | document.onclick = hidemenu ; |
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133 | </script> |
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134 | |
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135 | </body> |
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136 | </html> |
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