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devtools.html
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devtools.html
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<script>
'use strict';
var lastStylesheet = null;
var addedCSS = '';
chrome.experimental.devtools.inspectedWindow.onResourceContentCommitted.addListener(function(event) {
var url = '';
if (event.type === 'document') {
if (lastStylesheet) {
url = lastStylesheet.url;
} else {
console.error('No external stylesheets found');
return;
}
} else {
url = event.url;
}
chrome.extension.sendRequest({method: 'getBackend', url: url, type: event.type}, function(backendURL) {
if (!backendURL) {
console.error(url + ' does not correspond to any backend.');
return;
}
event.getContent(function(content) {
if (event.type === 'stylesheet') {
if (event.url === lastStylesheet.url) {
lastStylesheet.content = content;
}
} else if (event.type === 'document') {
addedCSS = content + '\n';
}
chrome.extension.sendRequest({
method: 'send',
content: (event.type === 'document' ? lastStylesheet.content : content) + addedCSS,
url: backendURL,
headers: {
'X-URL': url,
'X-Type': event.type
}
});
});
});
});
function updateLastStylesheet() {
lastStylesheet = null;
chrome.devtools.inspectedWindow.eval('(function() {\n\
var links = document.querySelectorAll("link[rel=stylesheet][href]");\n\
var last = links && links.length && links[links.length - 1];\n\
return last && last.href})()', function(href, fail) {
if (fail) return;
chrome.devtools.inspectedWindow.getResources(function(resources) {
var i = resources.length;
while (i--) {
var resource = resources[i];
if (resource.url === href && resource.type === 'stylesheet') {
resource.getContent(function(content) {
lastStylesheet = {
content: content,
url: resource.url
};
});
break;
}
}
});
});
}
updateLastStylesheet();
chrome.experimental.devtools.onReset.addListener(function() {
console.log('Reset');
addedCSS = '';
updateLastStylesheet();
});
</script>