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More Keybinds

Adds some extra keystrokes to Firefox.

当前为 2017-05-07 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name           More Keybinds
  3. // @namespace      MK
  4. // @description    Adds some extra keystrokes to Firefox.
  5. // @version        1.2.2
  6. // @include        *
  7. // @run-at         document-start
  8. // @grant          none
  9. // ==/UserScript==
  10.  
  11. var SCROLL_AMOUNT = 60;
  12.  
  13. // Not all keys fire a keypress event (Chrome 2010), so we use keydown.
  14. document.addEventListener('keydown', keypressListener, false);
  15.  
  16. function keypressListener(evt) {
  17. 	var code = evt.keyCode || evt.which;
  18.  
  19. 	/*
  20. 	var modifierReport = "";
  21. 	modifierReport += ( evt.ctrlKey  ? "Ctrl "  : "" );
  22. 	modifierReport += ( evt.shiftKey ? "Shift " : "" );
  23. 	modifierReport += ( evt.altKey   ? "Alt "   : "" );
  24. 	GM_log("Caught keypress "+code+" with modifiers: "+modifierReport);
  25. 	*/
  26.  
  27. 	// Actions
  28.  
  29. 	// Ctrl+Delete goes Back
  30. 	if (code == 8 && evt.ctrlKey) {
  31. 		window.history.back();
  32. 	}
  33.  
  34. 	// Ctrl+Enter goes Forward
  35. 	if (code == 13 && evt.ctrlKey) {
  36. 		window.history.forward();
  37. 	}
  38.  
  39. 	/* These conflict with selecting words in text!
  40.  
  41. 	// Ctrl+Shift+Left goes Back
  42. 	if (code == 37 && evt.ctrlKey && evt.shiftKey) {
  43. 		window.history.back();
  44. 	}
  45.  
  46. 	// Ctrl+Shift+Right goes Forward
  47. 	if (code == 39 && evt.ctrlKey && evt.shiftKey) {
  48. 		window.history.forward();
  49. 	}
  50.  
  51. 	*/
  52.  
  53. 	// Ctrl+Shift+Up goes up in the URL path (removes the tail leaf)
  54. 	if (code == 38 && evt.ctrlKey && evt.shiftKey) {
  55. 		var newURL = document.location.href;
  56. 		if (newURL.slice(-1)=='/') {
  57. 			newURL = newURL.slice(0,-1);
  58. 		}
  59. 		document.location.href = document.location.href.replace(/[#/?][^#/?]*[/]*$/,'');
  60. 	}
  61.  
  62. 	// Do not intercept any of the keys below when the user is focused on an input or textarea.
  63. 	/*
  64. 	//var focusedElement = document.activeElement;   // document.body if no input is focused
  65. 	var focusedElement = evt.target || event.srcElement;
  66. 	if (focusedElement) {
  67. 		var isInput = focusedElement.nodeName === 'INPUT' || focusedElement.nodeName === 'TEXTAREA';
  68. 		if (isInput) {
  69. 			return;
  70. 		}
  71. 	}
  72. 	*/
  73. 	// From next_imageprevious_image.user.js:
  74. 	if (evt.target.tagName && evt.target.tagName.match(/input|select|textarea/i) || evt.target.getAttribute('contenteditable')==="true") {
  75. 		return;
  76. 	}
  77.  
  78. 	if (!evt.ctrlKey && !evt.shiftKey && !evt.metaKey) {
  79. 		if (document.location.host !== "9gag.com") {
  80. 			if (code === 'K'.charCodeAt(0)) {
  81. 				scrollBy(-getScrollAmount());
  82. 			}
  83.  
  84. 			if (code === 'J'.charCodeAt(0)) {
  85. 				scrollBy(+getScrollAmount());
  86. 			}
  87. 		}
  88. 	}
  89.  
  90. }
  91.  
  92. function scrollBy(amount) {
  93. 	// If jQuery is present, use it to perform a smooth scroll
  94. 	if (typeof $ !== "undefined" && $.fn && $.fn.animate) {
  95. 		queue(function(next){
  96. 			$("html,body").animate({scrollTop: $(document).scrollTop() + amount}, 200, "swing", ifBody(next));
  97. 		});
  98. 	} else {
  99. 		// otherwise perform a jerky scroll
  100. 		// Chrome:
  101. 		document.body.scrollTop += amount;
  102. 		// Firefox:
  103. 		document.documentElement.scrollTop += amount;
  104. 	}
  105. }
  106.  
  107. function getScrollAmount() {
  108. 	return window.innerHeight / 6;
  109. }
  110.  
  111. function ifBody(fn) {
  112. 	return function(){
  113. 		// jQuery calls complete once for each element, and we have two elements.  Annoying!
  114. 		if (this === document.body) {
  115. 			fn();
  116. 		}
  117. 	};
  118. }
  119.  
  120. var actions = [];
  121. var running = false;
  122. function queue(action) {
  123. 	actions.push(action);
  124. 	if (!running) {
  125. 		dequeue();
  126. 	}
  127. }
  128. function dequeue() {
  129. 	if (actions.length > 0) {
  130. 		var nextAction = actions.shift();
  131. 		running = true;
  132. 		nextAction(dequeue);
  133. 	} else {
  134. 		running = false;
  135. 	}
  136. }