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Currently scripts in documents are allowed, so we need to sandbox them so they can't go and read other documents. We can't put the document in a sandboxed iframe because that breaks clean pagination and reflow. Currently, meta sandbox is poorly supported, as are Service Workers (which would also be a heavyweight solution). So we open the window from a sandboxed iframe, because no-allow-same- origin trickles down to the opened window. We then position that iframe over the print button, because of popup blockers. This commit also fixes printing of non-html files.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| <!-- | ||
| * Firetext Editor | ||
| * Copyright (C) Codexa Organization. | ||
| --> | ||
| <!DOCTYPE html> | ||
| <html> | ||
| <head> | ||
| <meta charset="utf-8"> | ||
|
|
||
| <!-- Lib --> | ||
| <script type="text/javascript" src="../../scripts/lib/kamino.js"></script> | ||
| <script type="text/javascript" src="../../scripts/lib/message_channel.js"></script> | ||
|
|
||
| <!-- Message Communication Proxy --> | ||
| <script type="text/javascript" src="../../scripts/messages.js"></script> | ||
|
|
||
| <!-- Main Script --> | ||
| <script type="text/javascript" src="scripts/printButton.js"></script> | ||
|
|
||
| <!-- Styles --> | ||
| <link rel="stylesheet" type="text/css" href="style/printButton.css"/> | ||
| </head> | ||
| <body> | ||
| </body> | ||
| </html> |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| window.addEventListener('DOMContentLoaded', function() { | ||
| // WARNING: DO NOT REPLACE, THIS STRING IS REPLACED WITH THE ORIGIN AUTOMATICALLY WHEN LOADED FROM editorProxy.js | ||
| var mainOrigin = "[ORIGIN_OF_MAIN_DOCUMENT]"; | ||
|
|
||
| // Proxy for communication with parent page | ||
| var parentMessageProxy; | ||
|
|
||
| window.addEventListener("message", function(e){ | ||
| if(e.origin !== mainOrigin) { | ||
| throw new Error("origin did not match"); | ||
| } | ||
| if(e.data.command === "init" && e.ports.length) { | ||
| // register port | ||
| parentMessageProxy = new MessageProxy(e.ports[0]); | ||
| parentMessageProxy.getPort().start(); | ||
| } | ||
| }, false); | ||
|
|
||
| window.addEventListener('click', function() { | ||
| var win = window.open(URL.createObjectURL(new Blob([ | ||
| "<script>", | ||
| "window.addEventListener('message', function(evt) {", | ||
| " document.open('text/html', 'replace');", | ||
| " document.write(evt.data.content);", | ||
| " document.close();", | ||
| "});", | ||
| "</script>", | ||
| ], {type: 'text/html'}))); | ||
| var key = parentMessageProxy.registerMessageHandler(function(e){ | ||
| win.postMessage({ | ||
| content: [ | ||
| '<!DOCTYPE html>', | ||
| '<html moznomarginboxes>', | ||
| '<head>', | ||
| ' <meta charset="utf-8">', | ||
| ' <title>' + e.data.filename.replace(/</g, '<') + e.data.filetype + '</title>', | ||
| ' <style>', | ||
| ' #firetext_print_notice {', | ||
| ' border: 2px solid;', | ||
| ' font-size: xx-large;', | ||
| ' margin: 20px;', | ||
| ' padding: 20px;', | ||
| ' border-radius: 8px;', | ||
| ' font-family: sans-serif;', | ||
| ' }', | ||
| ' @media print {', | ||
| ' #firetext_print_notice {', | ||
| ' display: none;', | ||
| ' }', | ||
| ' }', | ||
| ' </style>', | ||
| '</head>', | ||
| '<body>', | ||
| '', | ||
| e.data.content, | ||
| "", | ||
| "<script>", | ||
| "var onAfterPrint = function(mql) {", | ||
| " if(!mql.matches) {", | ||
| " window.close();", | ||
| " }", | ||
| "};", | ||
| "var mql = window.matchMedia('print');", | ||
| "if(", | ||
| " navigator.userAgent.indexOf('Chrome') !== -1 &&", | ||
| " // In both Firefox and IE the window.print() dialog is less featureful than menu -> print,", | ||
| " // (preview and page settings,) so we allow the user to select the latter if they want.", | ||
| " // Also, they don't support the following (they have onafterprint), but they might in the future.", | ||
| " navigator.userAgent.indexOf('Android') === -1", | ||
| " // Chrome Android returns from printing before it's done and crashes if we window.close().", | ||
| " // Also match Android tablet and WebView Android because they're probably the same.", | ||
| ") {", | ||
| " mql.addListener(onAfterPrint);", | ||
| "}", | ||
| "var onAutoPrintUnsupported = function() {", | ||
| " // The browser doesn't support window.print() (or window.print() is non-blocking).", | ||
| " // So we ask the user that, if the browser supports printing, they print manually.", | ||
| " var notice = document.createElement('div');", | ||
| " notice.id = 'firetext_print_notice';", | ||
| " notice.textContent = " + JSON.stringify(e.data['automatic-printing-failed']) + ";", | ||
| " document.body.insertBefore(notice, document.body.firstChild);", | ||
| " mql.removeListener(onAfterPrint);", | ||
| " onAutoPrintUnsupported = function() {};", | ||
| "};", | ||
| "var t0 = Date.now();", | ||
| "setTimeout(function() {", | ||
| " if(Date.now() - t0 < 200) {", | ||
| " onAutoPrintUnsupported();", | ||
| " }", | ||
| "});", | ||
| "try {", | ||
| " window.print();", | ||
| "} catch(e) {", | ||
| " onAutoPrintUnsupported();", | ||
| "}", | ||
| "</script>", | ||
| "</body>", | ||
| "</html>", | ||
| ].join('\n') | ||
| }, '*'); | ||
| }, null, true); | ||
| parentMessageProxy.getPort().postMessage({ | ||
| command: "print-button-pressed", | ||
| key: key | ||
| }); | ||
| }); | ||
| }); |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,4 @@ | ||
| html { | ||
| height: 100%; | ||
| cursor: pointer; | ||
| } |
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