84 lines
2.3 KiB
JavaScript
84 lines
2.3 KiB
JavaScript
let port = undefined;
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// Run the shellfox helper program.
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function init_shellfox_port() {
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port = browser.runtime.connectNative("shellfox");
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port.onDisconnect.addListener((port) => {
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console.log(port.error);
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port = undefined;
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});
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}
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// Return the command-string associated with a URL, if any.
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function getUrlCommand(url) {
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let matchCommand = undefined;
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let matchRegex = "";
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try {
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let savedCommands = JSON.parse(localStorage.getItem("commands"));
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// Find the most-applicable command…
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for (regexCommandPair of savedCommands) {
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let regex = regexCommandPair[0];
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let match = url.match(regex);
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let compared = compareRegexComplexity(matchRegex, regex);
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if (match && (compared == 0 || compared == 1)) {
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matchCommand = regexCommandPair[1];
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matchRegex = regex;
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}
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}
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// … and replace the substitution-string with the URL.
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matchCommand = matchCommand.replaceAll("%s", url);
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} catch {};
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return matchCommand;
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}
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// Execute the shell command associated with the given URL, if any.
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function runUrlCommand(url) {
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let command = getUrlCommand(url);
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if (!port)
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init_shellfox_port();
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if (command && port) {
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port.postMessage(command);
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}
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}
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// Compare two regular expressions, returning which one is more specific.
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// Returns -1 if a is more specific, 1 if b is, and 0 if they are equal.
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// It’s a simple (and unreliable) algorithm, for now — purely based on length.
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function compareRegexComplexity(a, b) {
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if (a && ((a && !b) || (a.length > b.length)))
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return -1;
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else if (b && ((b && !a) || (a.length < b.length)))
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return 1
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return 0;
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}
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// When the address-bar button is clicked, run the according command (if any).
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browser.pageAction.onClicked.addListener((tab) => {
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runUrlCommand(tab.url);
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});
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// When a tab’s URL has been changed, enable/disable the address-bar button
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// based on whether or not there is an according command.
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browser.tabs.onUpdated.addListener((tabId, changeInfo, tab) => {
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if (getUrlCommand(tab.url))
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browser.pageAction.show(tabId);
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else
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browser.pageAction.hide(tabId);
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});
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// When the active tab has changed, enable/disable the address-bar button based
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// on whether or not there is an according command for it.
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browser.tabs.onActivated.addListener((activeInfo) => {
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browser.tabs.get(activeInfo.tabId).then((tab) => {
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if (getUrlCommand(tab.url))
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browser.pageAction.show(tab.id);
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});
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});
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