Crop videos on youtube
当前为
// ==UserScript==
// @name Youtube video crop
// @namespace http://tampermonkey.net/
// @version 0.1.2
// @description Crop videos on youtube
// @locale en
// @author You
// @match *://www.youtube.com/*
// @require https://code.jquery.com/jquery-3.2.1.min.js
// @grant none
// ==/UserScript==
(function () {
'use strict';
var DEBUG = false;
function injectCSS(css) {
var styleTag = $('<style>' + css + '</style>');
$('html > head').append(styleTag);
console.log('injected css:', css);
}
injectCSS(
'#_area_overlay{' +
'display: none; position: absolute; pointer-events: none; ' +
'top: 0: left: 0; z-index:10; ' +
'background: rgba(255, 0, 0, 0.3); ' +
'} ' +
'._stupid_btn{'+
'vertical-align: top; font-weight: bold; ' +
'width: auto !important; '+
'padding-right: 5px; padding-left: 5px;' +
'}'
);
var _is_down = false;
var _area_updating = false;
var sx,sy;
var sx_,sy_;
var ex,ey;
var scale = 1;
var overlay;
var _is_cropped = false;
function scale_video(x, y, scale) {
injectCSS('.video-stream{ transform: ' +
'translate(-50%, -50%) ' +
'scale(' + scale + ') ' +
'translate(50%, 50%) ' +
'translate(-' + x + '%, -' + y + '%)' +
'}');
}
function _update_area() {
var player = $('.video-stream');
var vwidth = player.width();
var vheight = player.height();
scale_video(sx, sy, scale);
overlay.css('display', 'none');
_area_updating = false;
}
function setup_cropper(){
if(DEBUG) console.debug('Try setting up cropper.');
if( $('.video-stream').length == 0) return;
if(DEBUG) console.debug('Video stream found.');
overlay = $('#_area_overlay');
if(overlay.length > 0){
if(DEBUG) console.debug('Overlay already present.');
}else{
if(DEBUG) console.debug('Creating overlay.');
overlay = $('<div id="_area_overlay"></div>');
$('body').append(overlay);
if(DEBUG) console.debug('Adding buttons.');
// we just assume if there is no overlay there are also no new buttons.
$('.ytp-right-controls').prepend('<button class="_stupid_btn ytp-button" title="Crop video" id="_btn_crop">Crop</button>');
// area calculation
if(DEBUG) console.debug('Setting up area calulation event handler.');
sx = sy = ex = ey = sx_ = sy_ = 0;
$('#player').mousedown(function (e) {
if (!_area_updating) return;
_is_down = true;
var vwidth = $('.video-stream').width();
var vheight = $('.video-stream').height();
var offset = $('.video-stream').offset();
sx_ = (e.pageX - offset.left);
sy_ = (e.pageY - offset.top);
sx = ((100 / vwidth) * sx_);
sy = ((100 / vheight) * sy_);
overlay.css('top', e.pageY + 'px');
overlay.css('left', e.pageX + 'px');
});
$('#player').mouseup(function (e) {
if ((!_area_updating) || (!_is_down)) return;
_is_down = false;
_update_area();
});
$('#player').mousemove(function (e) {
if ((!_area_updating) || (!_is_down)) return;
var vwidth = $('.video-stream').width();
var offset = $('.video-stream').offset();
ex = (e.pageX - offset.left);
ey = (e.pageY - offset.top);
scale = (vwidth * 1) / (ex - sx_);
overlay.css('width', (ex - sx_) + 'px');
overlay.css('height', (ey - sy_) + 'px');
});
$('#player').mouseleave(function (e) {
if ((!_area_updating) || (!_is_down)) return;
_is_down = false;
_update_area();
});
// UI buttons
var btn = "#_btn_crop";
if(DEBUG){
console.debug('Setting up UI button handler.');
var button = $('<button id="_dbg_btn"><h2>CROP</h2></button>');
$('#player').prepend(button);
btn += ", #_dbg_btn";
}
$(btn).click(function (e) {
if(_is_cropped){
injectCSS('.video-stream{ transform:translate(-' + 0 + '%, ' + 0 + '%) scale(1) }');
_is_cropped = false;
$(btn).text('Crop');
return;
}
$(btn).text('Uncrop');
overlay.css('display', 'block');
_is_cropped = true;
_area_updating = true;
});
}
}
addEventListener("spfdone", setup_cropper);
setup_cropper();
}) ();