347 lines
11 KiB
JavaScript
347 lines
11 KiB
JavaScript
// This happens right away, sometimes so fast that the content script isn't even ready. That's
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// why the content script also asks for this stuff.
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chrome.webNavigation.onCommitted.addListener(webNavigationListener.bind(this, "styleApply"));
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chrome.webNavigation.onHistoryStateUpdated.addListener(webNavigationListener.bind(this, "styleReplaceAll"));
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function webNavigationListener(method, data) {
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// Until Chrome 41, we can't target a frame with a message
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// (https://developer.chrome.com/extensions/tabs#method-sendMessage)
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// so a style affecting a page with an iframe will affect the main page as well.
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// Skip doing this for frames for now, which can result in flicker.
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if (data.frameId != 0) {
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return;
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}
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getStyles({matchUrl: data.url, enabled: true, asHash: true}, function(styleHash) {
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chrome.tabs.sendMessage(data.tabId, {method: method, styles: styleHash});
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// Don't show the badge for frames
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if (data.frameId == 0 && prefs.getPref("show-badge")) {
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delete styleHash.disableAll;
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chrome.browserAction.setBadgeText({text: getBadgeText(Object.keys(styleHash)), tabId: data.tabId});
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}
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});
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}
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chrome.extension.onMessage.addListener(function(request, sender, sendResponse) {
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switch (request.method) {
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case "getStyles":
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getStyles(request, sendResponse);
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return true;
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case "saveStyle":
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saveStyle(request, sendResponse);
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return true;
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case "styleChanged":
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cachedStyles = null;
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break;
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case "healthCheck":
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getDatabase(function() { sendResponse(true); }, function() { sendResponse(false); });
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break;
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case "openURL":
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openURL(request);
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break;
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}
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});
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function getStyles(options, callback) {
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var enabled = fixBoolean(options.enabled);
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var url = "url" in options ? options.url : null;
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var id = "id" in options ? options.id : null;
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var matchUrl = "matchUrl" in options ? options.matchUrl : null;
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// Return as a hash from style to applicable sections? Can only be used with matchUrl.
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var asHash = "asHash" in options ? options.asHash : false;
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var callCallback = function() {
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var styles = asHash ? {disableAll: prefs.getPref("disableAll", false)} : [];
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cachedStyles.forEach(function(style) {
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if (enabled != null && fixBoolean(style.enabled) != enabled) {
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return;
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}
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if (url != null && style.url != url) {
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return;
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}
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if (id != null && style.id != id) {
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return;
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}
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if (matchUrl != null) {
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var applicableSections = getApplicableSections(style, matchUrl);
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if (applicableSections.length > 0) {
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if (asHash) {
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styles[style.id] = applicableSections;
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} else {
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styles.push(style)
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}
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}
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} else {
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styles.push(style);
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}
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});
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callback(styles);
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}
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if (cachedStyles) {
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callCallback();
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return;
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}
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getDatabase(function(db) {
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db.readTransaction(function (t) {
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var where = "";
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var params = [];
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t.executeSql('SELECT DISTINCT s.*, se.id section_id, se.code, sm.name metaName, sm.value metaValue FROM styles s LEFT JOIN sections se ON se.style_id = s.id LEFT JOIN section_meta sm ON sm.section_id = se.id WHERE 1' + where + ' ORDER BY s.id, se.id, sm.id', params, function (t, r) {
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cachedStyles = [];
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var currentStyle = null;
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var currentSection = null;
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for (var i = 0; i < r.rows.length; i++) {
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var values = r.rows.item(i);
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var metaName = null;
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switch (values.metaName) {
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case null:
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break;
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case "url":
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metaName = "urls";
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break;
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case "url-prefix":
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metaName = "urlPrefixes";
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break;
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case "domain":
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var metaName = "domains";
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break;
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case "regexps":
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var metaName = "regexps";
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break;
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default:
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var metaName = values.metaName + "s";
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}
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var metaValue = values.metaValue;
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if (currentStyle == null || currentStyle.id != values.id) {
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currentStyle = {id: values.id, url: values.url, updateUrl: values.updateUrl, md5Url: values.md5Url, name: values.name, enabled: values.enabled, originalMd5: values.originalMd5, sections: []};
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cachedStyles.push(currentStyle);
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}
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if (values.section_id != null) {
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if (currentSection == null || currentSection.id != values.section_id) {
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currentSection = {id: values.section_id, code: values.code};
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currentStyle.sections.push(currentSection);
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}
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if (metaName && metaValue) {
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if (currentSection[metaName]) {
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currentSection[metaName].push(metaValue);
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} else {
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currentSection[metaName] = [metaValue];
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}
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}
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}
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}
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callCallback();
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}, reportError);
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}, reportError);
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}, reportError);
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}
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function fixBoolean(b) {
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if (typeof b != "undefined") {
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return b != "false";
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}
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return null;
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}
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const namespacePattern = /^\s*(@namespace[^;]+;\s*)+$/;
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function getApplicableSections(style, url) {
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var sections = style.sections.filter(function(section) {
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return sectionAppliesToUrl(section, url);
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});
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// ignore if it's just namespaces
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if (sections.length == 1 && namespacePattern.test(sections[0].code)) {
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return [];
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}
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return sections;
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}
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function sectionAppliesToUrl(section, url) {
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// only http, https, file, and chrome-extension allowed
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if (url.indexOf("http") != 0 && url.indexOf("file") != 0 && url.indexOf("chrome-extension") != 0) {
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return false;
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}
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if (!section.urls && !section.domains && !section.urlPrefixes && !section.regexps) {
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//console.log(section.id + " is global");
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return true;
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}
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if (section.urls && section.urls.indexOf(url) != -1) {
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//console.log(section.id + " applies to " + url + " due to URL rules");
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return true;
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}
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if (section.urlPrefixes && section.urlPrefixes.some(function(prefix) {
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return url.indexOf(prefix) == 0;
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})) {
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//console.log(section.id + " applies to " + url + " due to URL prefix rules");
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return true;
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}
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if (section.domains && getDomains(url).some(function(domain) {
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return section.domains.indexOf(domain) != -1;
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})) {
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//console.log(section.id + " applies due to " + url + " due to domain rules");
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return true;
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}
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if (section.regexps && section.regexps.some(function(regexp) {
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// we want to match the full url, so add ^ and $ if not already present
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if (regexp[0] != "^") {
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regexp = "^" + regexp;
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}
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if (regexp[regexp.length - 1] != "$") {
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regexp += "$";
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}
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try {
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var re = new RegExp(regexp);
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} catch (ex) {
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console.log(section.id + "'s regexp '" + regexp + "' is not valid");
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return false;
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}
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return (re).test(url);
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})) {
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//console.log(section.id + " applies to " + url + " due to regexp rules");
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return true;
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}
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//console.log(section.id + " does not apply due to " + url);
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return false;
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}
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var cachedStyles = null;
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function saveStyle(o, callback) {
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getDatabase(function(db) {
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db.transaction(function(t) {
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if (o.id) {
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// update whatever's been passed
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if ("name" in o) {
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t.executeSql('UPDATE styles SET name = ? WHERE id = ?;', [o.name, o.id]);
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}
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if ("enabled" in o) {
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t.executeSql('UPDATE styles SET enabled = ? WHERE id = ?;', [o.enabled, o.id]);
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}
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if ("url" in o) {
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t.executeSql('UPDATE styles SET url = ? WHERE id = ?;', [o.url, o.id]);
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}
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if ("updateUrl" in o) {
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t.executeSql('UPDATE styles SET updateUrl = ? WHERE id = ?;', [o.updateUrl, o.id]);
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}
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if ("md5Url" in o) {
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t.executeSql('UPDATE styles SET md5Url = ? WHERE id = ?;', [o.md5Url, o.id]);
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}
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if ("originalMd5" in o) {
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t.executeSql('UPDATE styles SET originalMd5 = ? WHERE id = ?;', [o.originalMd5, o.id]);
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}
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} else {
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// create a new record
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// set optional things to null if they're undefined
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["updateUrl", "md5Url", "url", "originalMd5"].filter(function(att) {
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return !(att in o);
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}).forEach(function(att) {
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o[att] = null;
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});
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t.executeSql('INSERT INTO styles (name, enabled, url, updateUrl, md5Url, originalMd5) VALUES (?, ?, ?, ?, ?, ?);', [o.name, true, o.url, o.updateUrl, o.md5Url, o.originalMd5]);
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}
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if ("sections" in o) {
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if (o.id) {
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// clear existing records
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t.executeSql('DELETE FROM section_meta WHERE section_id IN (SELECT id FROM sections WHERE style_id = ?);', [o.id]);
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t.executeSql('DELETE FROM sections WHERE style_id = ?;', [o.id]);
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}
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o.sections.forEach(function(section) {
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if (o.id) {
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t.executeSql('INSERT INTO sections (style_id, code) VALUES (?, ?);', [o.id, section.code]);
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} else {
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t.executeSql('INSERT INTO sections (style_id, code) SELECT id, ? FROM styles ORDER BY id DESC LIMIT 1;', [section.code]);
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}
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if (section.urls) {
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section.urls.forEach(function(u) {
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t.executeSql("INSERT INTO section_meta (section_id, name, value) SELECT id, 'url', ? FROM sections ORDER BY id DESC LIMIT 1;", [u]);
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});
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}
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if (section.urlPrefixes) {
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section.urlPrefixes.forEach(function(u) {
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t.executeSql("INSERT INTO section_meta (section_id, name, value) SELECT id, 'url-prefix', ? FROM sections ORDER BY id DESC LIMIT 1;", [u]);
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});
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}
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if (section.domains) {
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section.domains.forEach(function(u) {
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t.executeSql("INSERT INTO section_meta (section_id, name, value) SELECT id, 'domain', ? FROM sections ORDER BY id DESC LIMIT 1;", [u]);
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});
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}
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if (section.regexps) {
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section.regexps.forEach(function(u) {
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t.executeSql("INSERT INTO section_meta (section_id, name, value) SELECT id, 'regexp', ? FROM sections ORDER BY id DESC LIMIT 1;", [u]);
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});
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}
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});
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}
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}, reportError, function() {saveFromJSONComplete(o.id, callback)});
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}, reportError);
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}
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function saveFromJSONComplete(id, callback) {
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cachedStyles = null;
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if (id) {
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getStyles({method: "getStyles", id: id}, function(styles) {
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saveFromJSONStyleReloaded("styleUpdated", styles[0], callback);
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});
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return;
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}
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// we need to load the id for new ones
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getDatabase(function(db) {
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db.readTransaction(function (t) {
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t.executeSql('SELECT id FROM styles ORDER BY id DESC LIMIT 1', [], function(t, r) {
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var id = r.rows.item(0).id;
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getStyles({method: "getStyles", id: id}, function(styles) {
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saveFromJSONStyleReloaded("styleAdded", styles[0], callback);
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});
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}, reportError)
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}, reportError)
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});
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}
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function saveFromJSONStyleReloaded(updateType, style, callback) {
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notifyAllTabs({method: updateType, style: style});
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if (callback) {
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callback(style);
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}
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}
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// Get the DB so that any first run actions will be performed immediately when the background page loads.
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getDatabase(function() {}, reportError);
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// When an edit page gets attached or detached, remember its state so we can do the same to the next one to open.
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var editFullUrl = chrome.extension.getURL("edit.html");
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chrome.tabs.onAttached.addListener(function(tabId, data) {
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chrome.tabs.get(tabId, function(tabData) {
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if (tabData.url.indexOf(editFullUrl) == 0) {
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chrome.windows.get(tabData.windowId, {populate: true}, function(win) {
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// If there's only one tab in this window, it's been dragged to new window
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prefs.setPref('openEditInWindow', win.tabs.length == 1);
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});
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}
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});
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});
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function openURL(options) {
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chrome.tabs.query({currentWindow: true, url: options.url}, function(tabs) {
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// switch to an existing tab with the requested url
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if (tabs.length) {
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chrome.tabs.highlight({windowId: tabs[0].windowId, tabs: tabs[0].index}, function (window) {});
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} else {
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delete options.method;
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chrome.tabs.query({currentWindow: true, active: true}, function(tabs) {
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// re-use an active new tab page
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if (tabs.length && tabs[0].url.match(/^chrome:\/\/newtab\/?$/)) {
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chrome.tabs.update(options);
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} else {
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chrome.tabs.create(options);
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}
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});
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}
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});
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}
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