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fix bug for write more then 1s #44

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fix bug for write more then 1s #44

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28 changes: 24 additions & 4 deletions js/jquery.printarea.js
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Original file line number Diff line number Diff line change
Expand Up @@ -40,10 +40,14 @@
popClose : false,
extraCss : '',
extraHead : '',
onPrintStart: function() {},
retainAttr : ["id","class","style"] };

var settings = {};//global settings

var triggerTimer = null;
var PrintAreaWindow = null;

$.fn.printArea = function( options )
{
$.extend( settings, defaults, options );
Expand All @@ -56,14 +60,28 @@

var $printSource = $(this);

var PrintAreaWindow = PrintArea.getPrintWindow();
PrintAreaWindow = PrintArea.getPrintWindow();

PrintArea.write( PrintAreaWindow.doc, $printSource );
// if `PrintArea.write` consume time for more then 1s, the print result will be a white page,
// so, use `window.postMessage` to let `window` knows `write` is over.
if (window.parent.postMessage) {
window.removeEventListener("message", PrintArea.onMessage );
window.addEventListener("message", PrintArea.onMessage );
} else {
triggerTimer = setTimeout( function () { PrintArea.print( PrintAreaWindow ); }, 1000 );
}

setTimeout( function () { PrintArea.print( PrintAreaWindow ); }, 1000 );
PrintArea.write( PrintAreaWindow.doc, $printSource );
};

var PrintArea = {
onMessage: function (e) {
if (!e || !e.data || !e.data.printOk || !PrintAreaWindow) return;
console.log('trigger print');
triggerTimer && clearTimeout(triggerTimer);
PrintArea.print( PrintAreaWindow );
settings.onPrintStart && settings.onPrintStart();
},
print : function( PAWindow ) {
var paWindow = PAWindow.win;

Expand Down Expand Up @@ -128,7 +146,9 @@
htm += '<div ' + attributes + '>' + $(ele).html() + '</div>';
});

return "<body>" + htm + "</body>";
var script = `<script>window.onload = function() { window.parent.postMessage && window.parent.postMessage({ printOk: true }, '*') }</script>`;

return '<body>' + htm + script + '</body>';
},
getFormData : function ( ele ) {
var copy = ele.clone();
Expand Down