steamgifts.com shortcut keys

Adds helpful keyboard shortcut keys to steamgifts.com
当前为 2015-02-02 提交的版本，查看最新版本。
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// ==UserScript==
// @name        steamgifts.com shortcut keys
// @namespace   Barefoot Monkey
// @description Adds helpful keyboard shortcut keys to steamgifts.com
// @include     http://www.steamgifts.com/giveaway/*
// @include     http://www.steamgifts.com/support/*
// @include     http://www.steamgifts.com/discussion/*
// @match       http://www.steamgifts.com/support/*
// @match       http://www.steamgifts.com/giveaway/*
// @match       http://www.steamgifts.com/discussion/*
// @version     2
// ==/UserScript==

try {
	var OP_name
	var is_giveaway, is_forum, is_support

	// determine where on the site we are visiting
	var path_matches = location.pathname.match(/^\/([^\/]*)\/([^\/]*)\/.*/)
	if (path_matches) {
		switch (path_matches[1]) {
			case 'giveaway': is_giveaway = true; break
			// case 'support': is_support = true; break
			case 'discussion': is_forum = true; break
		}
	}

	// discover the name of the author of the thread/giveaway
	if (is_giveaway) {
		var name_element = document.querySelector('.featured__summary .featured__column a')
		if (name_element) {
			OP_name = name_element.textContent.trim()
		}
	} else if (is_forum) {
		var name_element = document.querySelector('.comment__username>a')
		if (name_element) {
			OP_name = name_element.textContent.trim()
		}
	}

	// catch keypress events
	document.addEventListener("keydown", function(event) {
	
		try {

			// ctrl shortcut keys to focus or submit the textbox
			if (event.ctrlKey && !event.repeat) {

				// ctrl+enter
				if (event.which == 13) {
					var active = document.activeElement

					if (active && active === document.querySelector('.comment--submit div.comment__description>form>textarea[name=description]')) {
						var button = document.querySelector('.comment--submit .comment__submit-button')
						if (button) {
							button.dispatchEvent(
								new MouseEvent('click', {
									'view': window,
									'bubbles': true,
									'cancelable': true
								})
							)
							event.preventDefault()
						}
					}
				}

				// ctrl+space
				else if (event.which == 32) {
					// find the comment textarea
					var textbox = document.querySelector('.comment--submit div.comment__description>form>textarea[name=description]')

					// give focus to the comment textarea
					if (textbox) {
						textbox.focus()
						event.preventDefault()
					}
				}
			}

			if (event.altKey && !event.repeat) {
		
				// ignore case
				var which = event.which|32

				// alt+e = enter the giveaway
				if (is_giveaway && which == 101) {
					var button

					if (event.shiftKey) {
						button = document.querySelector('.sidebar__entry-delete:not(.is-hidden)')
					} else {
						button = document.querySelector('.sidebar__entry-insert:not(.is-hidden)')
					}

					if (button) {
						button.dispatchEvent(
							new MouseEvent('click', {
								'view': window,
								'bubbles': true,
								'cancelable': true
							})
						)
					}
					event.preventDefault()
	
				// handle comment-editing shortcuts
				} else {

					var active = document.activeElement

					if (active && active === document.querySelector('.comment--submit div.comment__description>form>textarea[name=description]')) {

						// alt+o = original poster's name
						if (which == 111) {

							// insert OP's name it into the comment
							if (OP_name) {

								// take note of the cursor position
								var cursor_pos = active.selectionStart

								// insert the name
								var text = active.value
								active.value = (text.substring(0, cursor_pos) + OP_name + text.substring(active.selectionEnd))

								// move the cursor
								cursor_pos += OP_name.length
								active.setSelectionRange(cursor_pos, cursor_pos)

								// prevent the browser from handling this event
								event.preventDefault()
							}

						// alt+p or alt+r = parent poster's name
						} else if (which == 112 || which == 114) {

							// prevent ctrl+alt+p because of reported conflict with Puush
							if (event.ctrlKey && event.altKey && which == 112) return;

							// traverse up the DOM tree to find name of the parent post's author
							var PP_name = OP_name
							{
								var parent = active
								while (parent = parent.parentNode) {
									if (parent.classList && parent.classList.contains('comment') && !parent.classList.contains('comment--submit')) {
										var name_e = parent.querySelector('.comment__username>a')
										if (name_e) PP_name = name_e.textContent.trim()
										break
									}
								}
							}

							// insert PP's name it into the comment
							if (PP_name) {

								// take note of the cursor position
								var cursor_pos = active.selectionStart

								// insert the name
								var text = active.value
								active.value = (text.substring(0, cursor_pos) + PP_name + text.substring(active.selectionEnd))

								// move the cursor
								cursor_pos += PP_name.length
								active.setSelectionRange(cursor_pos, cursor_pos)

								// prevent the browser from handling this event
								event.preventDefault()
							}
						}
					}
				}
			}
		} catch (exception) { console.log(exception) }

	}, true)

} catch (exception) { console.log(exception) }
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