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jsclary
55 lines
2.1 KiB
JavaScript
55 lines
2.1 KiB
JavaScript
//console.log("RubberGlove: Content Script for " + window.location.href);
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function getConfig(filename) {
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var xhr = new XMLHttpRequest();
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xhr.open('GET', 'filesystem:' + chrome.extension.getURL('temporary/' + filename), false);
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xhr.send(null);
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if(xhr.status == 200) return xhr.responseText;
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return;
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}
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var configText = getConfig("persistedSettings.js");
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console.log("RubberGlove: config = " + configText);
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var config = JSON.parse(configText);
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if(config.local.enabled) {
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// Create the script to be injected
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var pageScript = document.createElement('script');
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pageScript.type = 'text/javascript';
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pageScript.async = false;
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pageScript.text = "(function() {\n" +
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"var config = " + configText + ";\n" +
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"(" + bomOverload.toString() + ")();\n" +
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"(" + scriptCleanupFunction.toString() + ")();\n" +
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"})();";
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// Locate the <head> or create a new one if there isn't one or it isn't at
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// the top of the page.
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var html = document.documentElement
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var headTags = document.getElementsByTagName("head");
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var head = headTags.length > 0 ? head = headTags[0] : null;
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if(!head || head !== html.firstChild) {
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head = document.createElement('head');
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html.insertBefore(head, html.firstChild);
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pageScript.id = "_RubberGlove_removeHead";
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}
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// Listen for callbacks from the page script
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window.addEventListener("message", function(event) {
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if(event.source != window) return;
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if(event.data.type && event.data.type == "RubberGlove") {
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// Tell background.js to increment the badge counter
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chrome.runtime.sendMessage({
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type: "increment-counter",
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url: window.location.href,
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message: event.data.text
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});
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}
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});
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// Insert our script into the page. Note: This absolutely cannot under
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// any circumstances happen in an async callback otherwise scripts on the
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// page may run first and have access to the unwrapped objects.
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// Synchronous XHR requests before this seem to work fine, however.
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head.insertBefore(pageScript, head.firstChild);
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}
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