background.js

// Initialize a counter for clicks
let clickCount = 0;
let singleClickTimer = null;

// This event is fired when the extension icon is clicked
chrome.action.onClicked.addListener((tab) => {
  // Increment the click counter
  clickCount++;

  // If this is the first click, start a timer
  // If there's no second click within 300ms, execute the single click function
  if (clickCount === 1) {
    singleClickTimer = setTimeout(() => {
      // Reset click counter
      clickCount = 0;

      // Perform the single click action
      singleClickAction(tab);
    }, 300); 
  } else if (clickCount === 2) { // If there was a second click
    // Cancel the timer for single click action
    clearTimeout(singleClickTimer);

    // Reset click counter
    clickCount = 0;

    // Perform the double click action
    doubleClickAction(tab);
  }
});

// This function is executed when the extension icon is clicked once
function singleClickAction(tab) {
  // Decode the current tab's URL
  let url = decodeURIComponent(tab.url);
  
  // Execute the browser's copy command
  chrome.scripting.executeScript({
    target: { tabId: tab.id },
    function: copyToClipboard,
    args: [url],
  });

  // Change the extension icon to indicate success
  chrome.action.setIcon({ path: "icons/icon_48_green.png", tabId: tab.id });

  // After 1 second, change the icon back to the original
  setTimeout(() => {
    chrome.action.setIcon({ path: "icons/icon_48.png", tabId: tab.id });
  }, 1000);
}

// This function is executed when the extension icon is double-clicked
function doubleClickAction(tab) {
  // Get all tabs in the current window
  chrome.tabs.query({currentWindow: true}, function(tabs) {
    // Create a newline-separated string of all decoded URLs
    let urls = tabs.map(tab => decodeURIComponent(tab.url)).join('\n');
    
    // Execute the browser's copy command
    chrome.scripting.executeScript({
      target: { tabId: tab.id },
      function: copyToClipboard,
      args: [urls],
    });

    // Change the extension icon to indicate success
    chrome.action.setIcon({ path: "icons/icon_48_green_all.png", tabId: tab.id });

    // After 1 second, change the icon back to the original
    setTimeout(() => {
      chrome.action.setIcon({ path: "icons/icon_48.png", tabId: tab.id });
    }, 1000);
  });
}

function copyToClipboard(text) {
  navigator.clipboard.writeText(text);
}