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js-crop.js
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js-crop.js
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/*
* Js Crop
* javascript library that enables image cropping
* https://ujwolbastakoti.wordpress.com/
* MIT license
*
*/
'use strict'
class jsCrop {
constructor(sel, param2, param3) {
let elList = Array.from(document.querySelectorAll(sel));
elList.forEach((el) => {
if (undefined != el.type && 'file' == el.type) {
el.addEventListener('change', event => {
let img = event.target.files[0];
if (undefined != img) {
if (FileReader) {
const reader = new FileReader();
reader.addEventListener("load", event => {
var uploadImg = new Image();
uploadImg.src = event.target.result
uploadImg.addEventListener('load', event => this.createOverlay(event.target, param2, param3));
});
reader.readAsDataURL(img);
}
}
}
);
} else {
el.addEventListener('click', event => event.target.addEventListener('load', this.createOverlay(event.target, param2, param3)));
}
});
window.addEventListener('resize', event => this.adjustApp(event));
window.addEventListener('keydown', event => this.onKeyStroke(event));
}
/**
* Create overlay and initialize cropping
*
*@param img image to be cropped
*@param param2 Toolbar settings
*@param param3 Adiitional buttons object
*
*/
createOverlay(img, param2, param3) {
let imgType = undefined != param2 && undefined != param2.imageType && 'jpeg' == param2.imageType ? param2.imageType : 'png';
let imgQuality = undefined != param2 && undefined != param2.imageQuality ? param2.imageQuality : '1';
let scrollCss = document.createElement('style');
scrollCss.id = 'ctc-scroll-css';
scrollCss.innerHTML = `body{ overflow:hidden;margin:0;} ::-webkit-scrollbar-track {background: rgba(255, 255, 255, 1);} ::-moz-scrollbar-track { background: rgba(255, 255, 255, 1);} #js-crop-toolbar::-webkit-scrollbar {display: none;} #js-crop-toolbar::-moz-scrollbar {display: none;}`;
document.querySelector('head').appendChild(scrollCss);
window.scrollTo(0, 0);
let overlayDivEl = document.createElement("div");
let overlayBgColor = undefined != param2 && undefined != param2.customColor && undefined != param2.customColor.overlayBgColor ? param2.customColor.overlayBgColor : 'rgba(0,0,0,1)';
overlayDivEl.id = "js-crop-overlay";
overlayDivEl.setAttribute('draggable', false);
overlayDivEl.style = `user-select: none;top:0%;left:0%;right:0%;bottom:0%;height:${window.innerHeight}px;width:${window.innerWidth}px;background-color:${overlayBgColor};z-index:100000;`;
document.body.insertBefore(overlayDivEl, document.body.firstChild);
let orgImage = new Image();
orgImage.src = img.src;
let imgActHeight = orgImage.height;
let imgActWidth = orgImage.width;
let overlayDiv = document.querySelector('#js-crop-overlay');
let opImgDim = this.getOptimizedImageSize(overlayDiv.offsetWidth, overlayDiv.offsetHeight, imgActWidth, imgActHeight);
let imgStyle = `border: 0.5px dotted rgba(255,255,255,1);display:inline-block;margin:${((overlayDiv.offsetHeight - opImgDim.height) / 2)}px ${(((0.97 * overlayDiv.offsetWidth) - opImgDim.width) / 2)}px;vertical-align:top;`;
orgImage.id = "js-crop-image";
orgImage.style = imgStyle;
orgImage.height = opImgDim.height;
orgImage.width = opImgDim.width;
orgImage.setAttribute('data-img-type', imgType);
orgImage.setAttribute('data-img-quality', imgQuality);
orgImage.setAttribute('data-crop-status', 'in-active');
orgImage.setAttribute('data-crop-step', '0');
orgImage.setAttribute('data-crop-0', orgImage.src)
orgImage.setAttribute('data-crop-count', '0')
orgImage.setAttribute('draggable', false);
orgImage.setAttribute('data-dim-ratio', `${imgActWidth / opImgDim.width},${imgActHeight / opImgDim.height}`);
overlayDiv.appendChild(orgImage);
let jsCropCloseBtn = document.createElement('span');
jsCropCloseBtn.id = "js-crop-close-btn";
jsCropCloseBtn.title = "Close";
jsCropCloseBtn.innerHTML = "⤫";
jsCropCloseBtn.addEventListener('click', () => this.closeOverlay());
jsCropCloseBtn.style = `cursor:pointer;position:absolute;left:3px;font-size:${0.016 * document.querySelector('#js-crop-overlay').offsetWidth}px;color:rgba(255,255,255,1);text-shadow:-1px -1px 1px rgba(0,0,0,1);`;
overlayDiv.appendChild(jsCropCloseBtn);
this.createToolbar(overlayDiv, orgImage.src, {
height: opImgDim.height,
width: opImgDim.width,
dimRatio: `${imgActWidth / opImgDim.width},${imgActHeight / opImgDim.height}`
}, param2, param3);
}
/**
* Adjust crop overlay on window resize
*
*@param e resize event
*
*/
adjustApp(e) {
let overlayDiv = document.querySelector('#js-crop-overlay');
if (undefined != overlayDiv) {
let loadedImg = document.querySelector('#js-crop-image');
let toolbarDiv = document.querySelector('#js-crop-toolbar');
overlayDiv.style.height = `${window.innerHeight}px`;
overlayDiv.style.width = `${window.innerWidth}px`;
let toolbarOpts = Array.from(toolbarDiv.querySelectorAll('div'));
toolbarDiv.style.height = overlayDiv.offsetHeight + 'px';
toolbarDiv.style.paddingTop = ((overlayDiv.offsetHeight - (toolbarOpts.length * toolbarDiv.offsetWidth)) / 2) + 'px';
let bufferImg = new Image();
bufferImg.src = loadedImg.src;
let opImgDim = this.getOptimizedImageSize(overlayDiv.offsetWidth, overlayDiv.offsetHeight, bufferImg.width, bufferImg.height);
loadedImg.height = opImgDim.height
loadedImg.width = opImgDim.width;
loadedImg.style.margin = `${(((overlayDiv.offsetHeight - opImgDim.height) / 2))}px ${(((0.97 * overlayDiv.offsetWidth) - opImgDim.width) / 2)}px`;
toolbarOpts.map(x => {
x.style.height = x.offsetWidth + 'px';
x.style.fontSize = (0.80 * x.offsetWidth) + 'px';
});
document.querySelector('#js-crop-close-btn').style.fontSize = (0.45 * toolbarDiv.offsetWidth) + 'px';
if (undefined != document.querySelector('#cropRect')) {
document.querySelector('#js-crop-overlay').removeChild(document.querySelector('#js-crop-overlay').querySelector('#cropRect'));
document.querySelector('#start-crop').innerHTML = '⊞';
document.querySelector('#start-crop').title = `Select area`;
document.querySelector('#js-crop-image').setAttribute('data-crop-status', 'in-active');
document.querySelector('#js-crop-image').removeAttribute('data-start-co');
}
}
}
/**
* Create toolbar
*
*@param overlayDiv Overlay div object
*@param imgSrc Image source of image to be loaded
*@param imgDim Image dimension to load
*@param param2 for future extension
*/
createToolbar(overlayDiv, imgSrc, imgDim, param2, param3) {
let imgType = undefined != param2 && undefined != param2.imageType && 'jpeg' == param2.imageType ? param2.imageType : 'png';
let toolbar = document.createElement('div');
let toolbarBgColor = undefined != param2 && undefined != param2.customColor && undefined != param2.customColor.toolbarBgColor ? param2.customColor.toolbarBgColor : 'rgba(255,255,255,1)';
toolbar.id = `js-crop-toolbar`;
toolbar.style = `tex-align:center;padding:2px;color:rgba(255,255,255,1);display:inline-block;width:3%;height:${overlayDiv.offsetHeight}px;position:absolute;float:right;right:0;background-color:${toolbarBgColor};overflow-y:auto;`;
overlayDiv.appendChild(toolbar);
let btnFontColor = undefined != param2 && undefined != param2.customColor && undefined != param2.customColor.buttonFontColor ? param2.customColor.buttonFontColor : 'rgba(255,255,255,1)';
let btnBgColor = undefined != param2 && undefined != param2.customColor && undefined != param2.customColor.buttonBgColor ? param2.customColor.buttonBgColor : 'rgba(0,0,0,1)';
let btnStyle = `color:${btnFontColor};opacity:0;font-size:300%;cursor:pointer;border-radius:0%;margin-bottom:3px;background-color:${btnBgColor};text-align:center;width:98%;height:${toolbar.offsetWidth - 6}px;border:1px solid ${btnBgColor};box-shadow:-1px -1px 10px ${btnBgColor};`;
let cropIconDiv = document.createElement('div');
cropIconDiv.id = `start-crop`;
cropIconDiv.title = `Select area`;
cropIconDiv.style = btnStyle;
cropIconDiv.addEventListener('mouseenter', e => {
e.target.style.boxShadow = `-2px -2px 10px ${btnBgColor}`;
e.target.style.borderRadius = '20%'
})
cropIconDiv.addEventListener('mouseleave', e => {
e.target.style.boxShadow = `-1px -1px 1px ${btnBgColor}`;
e.target.style.borderRadius = '25%'
})
cropIconDiv.innerHTML = '⊞';
cropIconDiv.addEventListener('click', () => this.addCropEventListener(event));
toolbar.appendChild(cropIconDiv);
let revertDiv = document.createElement('div');
revertDiv.id = `revert-to-original`;
revertDiv.title = `Revert to original Image`;
revertDiv.setAttribute('data-img-dimension', imgDim.height + ',' + imgDim.width);
revertDiv.setAttribute('data-dim-ratio', imgDim.dimRatio);
revertDiv.addEventListener('mouseenter', e => {
e.target.style.boxShadow = `-2px -2px 10px ${btnBgColor}`;
e.target.style.borderRadius = '20%'
})
revertDiv.addEventListener('mouseleave', e => {
e.target.style.boxShadow = `-1px -1px 1px ${btnBgColor}`;
e.target.style.borderRadius = '25%'
})
revertDiv.style = btnStyle + 'line-height:1.3;';
revertDiv.innerHTML = '⇆';
revertDiv.addEventListener('click', event => this.revertToOriginal(event));
toolbar.appendChild(revertDiv);
let prevStepDiv = document.createElement('div');
prevStepDiv.id = `previous-step`;
prevStepDiv.title = `Revert to previous crop`;
prevStepDiv.style = btnStyle + 'line-height:1.4;';
prevStepDiv.addEventListener('mouseenter', e => {
e.target.style.boxShadow = `-2px -2px 10px ${btnBgColor}`;
e.target.style.borderRadius = '20%'
})
prevStepDiv.addEventListener('mouseleave', e => {
e.target.style.boxShadow = `-1px -1px 1px ${btnBgColor}`;
e.target.style.borderRadius = '25%'
})
prevStepDiv.innerHTML = '⤶';
prevStepDiv.addEventListener('click', event => this.restorePreviousCrop(event));
toolbar.appendChild(prevStepDiv);
let nextStepDiv = document.createElement('div');
nextStepDiv.id = `next-step`;
nextStepDiv.title = `Restore last crop`;
nextStepDiv.style = btnStyle + 'line-height:1.4;';
nextStepDiv.addEventListener('mouseenter', e => {
e.target.style.boxShadow = `-2px -2px 10px ${btnBgColor}`;
e.target.style.borderRadius = '20%'
})
nextStepDiv.addEventListener('mouseleave', e => {
e.target.style.boxShadow = `-1px -1px 1px ${btnBgColor}`;
e.target.style.borderRadius = '25%'
})
nextStepDiv.innerHTML = '⤷';
nextStepDiv.addEventListener('click', event => this.restoreNextCrop(event));
toolbar.appendChild(nextStepDiv);
if (undefined != param2 && 0 !== param2.length) {
if (false !== param2.saveButton) {
let saveImgDiv = document.createElement('div');
saveImgDiv.id = `save-image`;
saveImgDiv.title = `Save Image`;
saveImgDiv.style = btnStyle + 'line-height:1;';
saveImgDiv.addEventListener('mouseenter', e => {
e.target.style.boxShadow = `-2px -2px 10px ${btnBgColor}`;
e.target.style.borderRadius = '20%'
})
saveImgDiv.addEventListener('mouseleave', e => {
e.target.style.boxShadow = `-1px -1px 1px ${btnBgColor}`;
e.target.style.borderRadius = '25%'
})
saveImgDiv.innerHTML = '⤓';
saveImgDiv.addEventListener('click', () => {
let downloadLink = document.createElement('a');
downloadLink.href = this.currentImgToBlob();
downloadLink.setAttribute('download', 'image.' + imgType);
downloadLink.click();
});
toolbar.appendChild(saveImgDiv);
}
if (undefined != param2.extButton && 0 !== param2.extButton.length && 'function' == typeof (param2.extButton.callBack)) {
let extBtnDiv = document.createElement('div');
extBtnDiv.id = `ext-button`;
extBtnDiv.style = undefined != param2.extButton.buttonCSS ? btnStyle + param2.extButton.buttonCSS : btnStyle;
extBtnDiv.addEventListener('mouseenter', e => {
e.target.style.boxShadow = `-2px -2px 10px ${btnBgColor}`;
e.target.style.borderRadius = '20%'
})
extBtnDiv.addEventListener('mouseleave', e => {
e.target.style.boxShadow = `-1px -1px 1px ${btnBgColor}`;
e.target.style.borderRadius = '25%'
})
extBtnDiv.title = param2.extButton.buttonTitle ? param2.extButton.buttonTitle : 'Extension';
extBtnDiv.innerHTML = param2.extButton.buttonText ? param2.extButton.buttonText : 'ext';
extBtnDiv.addEventListener('click', () => param2.extButton.callBack(this.currentImgToBlob()));
toolbar.appendChild(extBtnDiv);
}
} else {
let saveImgDiv = document.createElement('div');
saveImgDiv.id = `save-image`;
saveImgDiv.title = `Save Image`;
saveImgDiv.style = btnStyle + 'line-height:1;';
saveImgDiv.addEventListener('mouseenter', e => {
e.target.style.boxShadow = `-2px -2px 10px ${btnBgColor}`;
e.target.style.borderRadius = '20%'
})
saveImgDiv.addEventListener('mouseleave', e => {
e.target.style.boxShadow = `-2px -2px 10px ${btnBgColor}`;
e.target.style.borderRadius = '25%'
})
saveImgDiv.innerHTML = '⤓';
saveImgDiv.addEventListener('click', () => {
let downloadLink = document.createElement('a');
downloadLink.href = this.currentImgToBlob();
downloadLink.setAttribute('download', 'image.' + imgType);
downloadLink.click();
});
toolbar.appendChild(saveImgDiv);
}
if (undefined != param3 && 0 !== param3.length) {
param3.map((x, i) => {
let btnEvnt = undefined != x.buttonEvent ? x.buttonEvent : 'click';
let addBtnDiv = document.createElement('div');
addBtnDiv.id = `ext-button-${i}`;
addBtnDiv.style = undefined != x.buttonCSS ? btnStyle + x.buttonCSS : btnStyle;
addBtnDiv.addEventListener('mouseenter', e => {
e.target.style.boxShadow = `-2px -2px 10px ${btnBgColor}`;
e.target.style.borderRadius = '20%'
})
addBtnDiv.addEventListener('mouseleave', e => {
e.target.style.boxShadow = `-1px -1px 1px ${btnBgColor}`;
e.target.style.borderRadius = '25%'
})
addBtnDiv.title = x.buttonTitle ? x.buttonTitle : `Button ${i + 1}`;
addBtnDiv.innerHTML = x.buttonText ? x.buttonText : `ext`;
if ('function' == typeof (x.callBack)) {
addBtnDiv.addEventListener(btnEvnt, () => x.callBack(this.currentImgToBlob(), x.relParam));
}
toolbar.appendChild(addBtnDiv);
});
}
let toolbarDiv = document.querySelector('#js-crop-toolbar');
let toolbarOpts = Array.from(toolbarDiv.querySelectorAll('div'));;
toolbarDiv.style.paddingTop = ((overlayDiv.offsetHeight - (toolbarOpts.length * toolbarDiv.offsetWidth)) / 2) + 'px'
toolbarOpts.map((x, i) => {
setTimeout(() => {
x.style.height = x.offsetWidth + 'px';
x.style.opacity = '1';
x.style.boxShadow = `-1px -1px 1px ${btnBgColor}`;
x.style.fontSize = (0.80 * x.offsetWidth) + 'px';
x.style.borderRadius = '25%';
x.addEventListener('click', (event) => {
if (0 !== i) {
if (undefined != document.querySelector('#cropRect')) {
document.querySelector('#js-crop-overlay').removeChild(document.querySelector('#js-crop-overlay').querySelector('#cropRect'));
}
document.querySelector('#start-crop').innerHTML = '⊞';
document.querySelector('#start-crop').title = `Select area`;
document.querySelector('#js-crop-image').setAttribute('data-crop-status', 'in-active');
document.querySelector('#js-crop-image').style.cursor = '';
document.querySelector('#js-crop-image').removeAttribute('data-start-co');
}
});
}, (5 * i))
});
}
/**
* Active crop area select
* @param e Select area button click event
*
*/
addCropEventListener(e) {
let imgEl = document.querySelector('#js-crop-image');
imgEl.setAttribute('data-mouse-status', 'up');
if ('in-active' === imgEl.getAttribute('data-crop-status')) {
imgEl.style.cursor = 'crosshair';
imgEl.setAttribute('data-crop-status', `active`);
imgEl.addEventListener("mousedown", event => {
let cropRect = document.querySelector('#cropRect');
if(null != cropRect){
cropRect.remove();
}
event.target.setAttribute('data-start-co', `${event.offsetX},${event.offsetY}`);
event.target.setAttribute('data-mouse-status', 'down');
event.target.addEventListener('mousemove', event => {this.createCropBox(event)});
});
e.target.innerHTML = '✂';
e.target.title = 'Crop';
} else if ('crop-ready' === imgEl.getAttribute('data-crop-status')) {
this.endCrop();
e.target.innerHTML = '⊞';
e.target.title = `Select area`;
imgEl.setAttribute('data-crop-status', `in-active`);
}
document.querySelector('#js-crop-overlay').addEventListener('mouseup', event => {
if ('start-crop' != event.target.id && 'in-active' != imgEl.getAttribute('data-crop-status')) {
imgEl.setAttribute('data-crop-status', 'crop-ready');
imgEl.setAttribute('data-mouse-status', 'up');
}
});
}
/**
* Revert to original image
* @param e Button click event
*/
revertToOriginal(e) {
let overlayDiv = document.querySelector('#js-crop-overlay');
let imgEl = document.querySelector('#js-crop-image');
let cropStepCount = parseInt(imgEl.getAttribute('data-crop-count'));
let bufferImg = new Image();
bufferImg.src = imgEl.getAttribute('data-crop-0');
imgEl.setAttribute('data-crop-count', '0');
imgEl.setAttribute('data-crop-step', '0');
for (let i = 1; i <= cropStepCount; i++) {
imgEl.removeAttribute('data-crop-' + i);
}
let opImgDim = this.getOptimizedImageSize(overlayDiv.offsetWidth, overlayDiv.offsetHeight, bufferImg.width, bufferImg.height);
imgEl.style.margin = `${((overlayDiv.offsetHeight - opImgDim.height) / 2)}px ${(((0.97 * overlayDiv.offsetWidth) - opImgDim.width) / 2)}px`;
imgEl.height = opImgDim.height;
imgEl.width = opImgDim.width;
imgEl.setAttribute('data-crop-status', 'in-active');
imgEl.removeAttribute('data-mouse-status');
imgEl.setAttribute('data-dim-ratio', e.target.getAttribute('data-dim-ratio'));
imgEl.src = imgEl.getAttribute('data-crop-0');
}
/**
* Resotre previous crop step
*
* @param e button click event
*/
restorePreviousCrop(e) {
let imgEl = document.querySelector('#js-crop-image');
let curCropStep = parseInt(imgEl.getAttribute('data-crop-step'));
if (1 < curCropStep) {
let overlayDiv = document.querySelector('#js-crop-overlay');
let bufferImg = new Image();
bufferImg.src = imgEl.getAttribute('data-crop-' + (curCropStep - 1));
bufferImg.addEventListener('load', () => {
let opImgDim = this.getOptimizedImageSize(overlayDiv.offsetWidth, overlayDiv.offsetHeight, bufferImg.width, bufferImg.height);
imgEl.setAttribute('data-crop-step', (curCropStep - 1));
imgEl.style.margin = `${((overlayDiv.offsetHeight - opImgDim.height) / 2)}px ${(((0.97 * overlayDiv.offsetWidth) - opImgDim.width) / 2)}px`;
imgEl.height = opImgDim.height;
imgEl.width = opImgDim.width;
imgEl.src = bufferImg.src
});
}
}
/**
* Resotre next crop step
*@param e button click event
*/
restoreNextCrop(e) {
let imgEl = document.querySelector('#js-crop-image');
let curCropStep = parseInt(imgEl.getAttribute('data-crop-step'));
let totalCrop = parseInt(imgEl.getAttribute('data-crop-count'));
if (0 < curCropStep && totalCrop >= (curCropStep + 1)) {
let overlayDiv = document.querySelector('#js-crop-overlay');
let bufferImg = new Image();
bufferImg.src = imgEl.getAttribute('data-crop-' + (curCropStep + 1));
bufferImg.addEventListener('load', () => {
let opImgDim = this.getOptimizedImageSize(overlayDiv.offsetWidth, overlayDiv.offsetHeight, bufferImg.width, bufferImg.height);
imgEl.setAttribute('data-crop-step', (curCropStep + 1));
imgEl.style.margin = `${((overlayDiv.offsetHeight - opImgDim.height) / 2)}px ${(((0.97 * overlayDiv.offsetWidth) - opImgDim.width) / 2)}px`;
imgEl.height = opImgDim.height;
imgEl.width = opImgDim.width;
imgEl.src = bufferImg.src;
console.log(imgEl.style.margin);
});
}
}
/**
* Restore current crop state to blob
*/
currentImgToBlob() {
let loadedImg = document.querySelector('#js-crop-image');
let origImgRatio = loadedImg.getAttribute('data-dim-ratio').split(',');
let imgType = `image/${loadedImg.getAttribute('data-img-type')}`;
let imgQuality = parseFloat(loadedImg.getAttribute('data-img-quality'));
let tempCanv = document.createElement('canvas');
let downloadLink = document.createElement('a');
let tempCtx = tempCanv.getContext('2d');
let imgHtRatio = parseFloat(origImgRatio[1]);
let imgWdRatio = parseFloat(origImgRatio[0]);
tempCanv.height = loadedImg.height;
tempCanv.width = loadedImg.width;
tempCtx.imageSmoothingEnabled = true;
tempCtx.imageSmoothingQuality = 'high';
tempCtx.drawImage(loadedImg, 0, 0, loadedImg.offsetWidth * imgWdRatio, loadedImg.offsetHeight * imgHtRatio, 0, 0, loadedImg.offsetWidth, loadedImg.offsetHeight);
return tempCanv.toDataURL(imgType, imgQuality);
}
/**
* Close overlay on close button click
*/
closeOverlay() {
document.body.removeChild(document.querySelector('#js-crop-overlay'));
document.body.style.overflow = '';
document.body.style.margin = ''
document.querySelector('head').removeChild(document.querySelector('#ctc-scroll-css'));
}
/**
* End crop on crop button click
*/
endCrop() {
let cropRect = document.querySelector('#cropRect');
if (undefined != cropRect) {
let startCo = cropRect.getAttribute('data-start-xy').split(',');
let cropImg = document.querySelector('#js-crop-image');
let curCropStep = parseInt(cropImg.getAttribute('data-crop-step')) + 1;
let cropStepCount = parseInt(cropImg.getAttribute('data-crop-count'));
let origImgRatio = cropImg.getAttribute('data-dim-ratio').split(',');
let overlayDiv = document.querySelector('#js-crop-overlay');
let imgQuality = parseFloat(cropImg.getAttribute('data-img-quality'));
let imgType = `'image/${cropImg.getAttribute('data-img-type')}`;
let tempCanv = document.createElement('canvas');
let tempCtx = tempCanv.getContext('2d');
let imgHtRatio = parseFloat(origImgRatio[1]);
let imgWdRatio = parseFloat(origImgRatio[0]);
let cropImgWd = cropRect.offsetWidth * imgWdRatio;
let cropImgHt = cropRect.offsetHeight * imgHtRatio;
cropImg.style.margin = `${((overlayDiv.offsetHeight - cropRect.offsetHeight) / 2)}px ${(((0.97 * overlayDiv.offsetWidth) - cropRect.offsetWidth) / 2)}px`;
cropImg.style.cursor = '';
tempCanv.height = cropRect.offsetHeight;
tempCanv.width = cropRect.offsetWidth;
cropImg.setAttribute('data-dim-ratio', '1,1');
cropImg.height = cropRect.offsetHeight;
cropImg.width = cropRect.offsetWidth;
tempCtx.imageSmoothingEnabled = true;
tempCtx.imageSmoothingQuality = 'high';
tempCtx.drawImage(cropImg, (parseInt(startCo[0]) * imgWdRatio), ((parseInt(startCo[1])) * imgHtRatio), cropImgWd, cropImgHt, 0, 0, cropRect.offsetWidth, cropRect.offsetHeight);
let imgBlob = tempCanv.toDataURL(imgType, imgQuality);
cropImg.setAttribute('data-crop-step', curCropStep);
cropImg.setAttribute('data-crop-' + curCropStep, imgBlob);
cropImg.setAttribute('data-crop-count', curCropStep);
cropImg.src = imgBlob;
cropImg.removeAttribute('data-start-co');
overlayDiv.removeChild(cropRect);
for (let i = (curCropStep + 1); i <= cropStepCount; i++) {
cropImg.removeAttribute('data-crop-' + i);
}
}
}
/**
* Create cropbox on button click
*@param e mousmover event
*
*/
createCropBox(e) {
let imgEl = document.querySelector("#js-crop-image");
if ('in-active' != imgEl.getAttribute('data-crop-status') && 'down' == imgEl.getAttribute('data-mouse-status')) {
let par = this.setCanvasCo(e);
if (undefined != par) {
let cropRect = document.querySelector('#cropRect');
if (undefined == cropRect) {
cropRect = document.createElement('div');
cropRect.setAttribute('draggable',false);
cropRect.id = 'cropRect';
cropRect.style = `z-index:1001000;cursor:crosshair;position:absolute;border:1px dashed rgba(255,255,255,1);box-shadow:0px 0px 10px rgba(0,0,0,1);left:${parseFloat(imgEl.style.marginLeft) + par.startX}px;top:${parseFloat(imgEl.style.marginTop) + par.startY}px;width:${par.width}px;height:${par.height}px;`;
cropRect.addEventListener("dragover", e => e.preventDefault());
cropRect.setAttribute('data-start-xy', par.startX + ',' + par.startY);
imgEl.parentNode.insertBefore(cropRect, imgEl);
cropRect.addEventListener('mousedown', () => imgEl.setAttribute('data-mouse-status', 'down'));
cropRect.addEventListener('mouseup', () => imgEl.setAttribute('data-mouse-status', 'up'));
this.addResizeBoxes(cropRect, { width: cropRect.offsetWidth, height: cropRect.offsetHeight },e,imgEl);
cropRect.addEventListener('mousemove', e => {
if ('down' == imgEl.getAttribute('data-mouse-status')) {
this.addResizeBoxes(cropRect, { width: cropRect.offsetWidth, height: cropRect.offsetHeight },e,imgEl);
}
});
} else {
if ('down' == imgEl.getAttribute('data-mouse-status') && null == cropRect.getAttribute('data-resize') ) {
cropRect.style.left = (parseFloat(imgEl.style.marginLeft) + par.startX) + 'px';
cropRect.style.top = (parseFloat(imgEl.style.marginTop) + par.startY) + 'px';
cropRect.style.height = par.height + 'px';
cropRect.style.width = par.width + 'px';
cropRect.setAttribute('data-start-xy', par.startX + ',' + par.startY);
this.addResizeBoxes(cropRect, par,e,imgEl);
}
}
}
}
}
/**
* Add and reposition resize boxes
*
* @param cropRect Crop slection area
* @param imgEl Main image element
* @param par Cropbox height width object
*/
addResizeBoxes(cropRect, par,e, imgEl) {
let boxStyle = `background-color :rgba(0,0,0,0.7);width:10px;height:10px;border:1px solid rgba(255,255,255,255);`;
let resizeBoxes = cropRect.querySelectorAll('span');
if (0 === resizeBoxes.length) {
let nwseResizeOne = document.createElement('span');
nwseResizeOne.style = boxStyle + `cursor:nwse-resize;margin-left:-6px;margin-top:-6px;position:absolute;position:absolute;`
nwseResizeOne.id = "nwse-resize-one";
nwseResizeOne.setAttribute('draggable', false)
nwseResizeOne.addEventListener('mousedown', () => {
cropRect.setAttribute('data-prev-mousepos','')
imgEl.setAttribute('data-mouse-status','up')
cropRect.setAttribute('data-resize', "nwse-resize-one")
})
nwseResizeOne.addEventListener('mouseup', () => cropRect.setAttribute('data-resize', ""));
cropRect.appendChild(nwseResizeOne);
let nsResizeOne = document.createElement('span');
nsResizeOne.style = boxStyle + `cursor:ns-resize;margin-left:${par.width / 2}px; margin-top: -7px; position:absolute;`
nsResizeOne.id = "ns-resize-one";
nsResizeOne.setAttribute('draggable', false)
nsResizeOne.addEventListener('mousedown', () => {
cropRect.setAttribute('data-prev-mousepos','')
imgEl.setAttribute('data-mouse-status','up')
cropRect.setAttribute('data-resize', "ns-resize-one")
})
nsResizeOne.addEventListener('mouseup', () => cropRect.setAttribute('data-resize', ""));
cropRect.appendChild(nsResizeOne);
let neswResizeOne = document.createElement('span');
neswResizeOne.style = boxStyle + `cursor:nesw-resize;margin-left:${par.width - 6}px; margin-top: -6px; position:absolute;`
neswResizeOne.id = 'nesw-resize-one';
neswResizeOne.setAttribute('draggable', false)
neswResizeOne.addEventListener('mousedown', () => {
cropRect.setAttribute('data-prev-mousepos','')
imgEl.setAttribute('data-mouse-status','up')
cropRect.setAttribute('data-resize', "nesw-resize-one")
})
neswResizeOne.addEventListener('mouseup', () => cropRect.setAttribute('data-resize', ""));;
cropRect.appendChild(neswResizeOne);
let ewResizeOne = document.createElement('span');
ewResizeOne.style = boxStyle + `cursor:ew-resize;margin-left:${par.width - 7}px; margin-top: ${(par.height / 2) - 7}px; position:absolute;`
ewResizeOne.id = 'ew-resize-one';
ewResizeOne.setAttribute('draggable', false)
ewResizeOne.addEventListener('mousedown', () => {
cropRect.setAttribute('data-prev-mousepos','')
imgEl.setAttribute('data-mouse-status','up')
cropRect.setAttribute('data-resize', "ew-resize-one")})
ewResizeOne.addEventListener('mouseup', () => cropRect.setAttribute('data-resize', ""));;
cropRect.appendChild(ewResizeOne);
let nwseResizeTwo = document.createElement('span');
nwseResizeTwo.style = boxStyle + `cursor:nwse-resize;margin-left:${par.width - 6}px; margin-top: ${par.height - 6}px; position:absolute;`
nwseResizeTwo.id = 'nwse-resize-two';
nwseResizeTwo.setAttribute('draggable', false)
nwseResizeTwo.addEventListener('mousedown', () => {
cropRect.setAttribute('data-prev-mousepos','')
imgEl.setAttribute('data-mouse-status','up')
cropRect.setAttribute('data-resize', "nwse-resize-two")
})
nwseResizeTwo.addEventListener('mouseup', () => cropRect.setAttribute('data-resize', ""));
cropRect.appendChild(nwseResizeTwo);
let nsResizeTwo = document.createElement('span');
nsResizeTwo.style = boxStyle + `cursor:ns-resize;margin-left:${(par.width / 2) - 6}px; margin-top: ${par.height - 7}px; position:absolute;`
nsResizeTwo.id = 'ns-resize-two';
nsResizeTwo.setAttribute('draggable', false)
nsResizeTwo.addEventListener('mousedown', () =>{
cropRect.setAttribute('data-prev-mousepos','')
imgEl.setAttribute('data-mouse-status','up')
cropRect.setAttribute('data-resize', "ns-resize-two")})
nsResizeTwo.addEventListener('mouseup', () => cropRect.setAttribute('data-resize', ""));
cropRect.appendChild(nsResizeTwo);
let neswResizeTwo = document.createElement('span');
neswResizeTwo.style = boxStyle + `cursor:nesw-resize;margin-left:-7px; margin-top:${par.height - 7}px;position:absolute;`
neswResizeTwo.id = 'nesw-resize-two';
neswResizeTwo.setAttribute('draggable', false)
neswResizeTwo.addEventListener('mousedown', () => {
cropRect.setAttribute('data-prev-mousepos','')
imgEl.setAttribute('data-mouse-status','up')
cropRect.setAttribute('data-resize', "nesw-resize-two")})
neswResizeTwo.addEventListener('mouseup', () => cropRect.setAttribute('data-resize', ""));;
cropRect.appendChild(neswResizeTwo);
let ewResizeTwo = document.createElement('span');
ewResizeTwo.style = boxStyle + `cursor:ew-resize;margin-left:-6px; margin-top: ${(par.height / 2) - 6}px; position:absolute;`
ewResizeTwo.id = 'ew-resize-two';
ewResizeTwo.setAttribute('draggable', false)
ewResizeTwo.addEventListener('mousedown', () => {
cropRect.setAttribute('data-prev-mousepos','')
imgEl.setAttribute('data-mouse-status','up')
cropRect.setAttribute('data-resize', "ew-resize-two")})
ewResizeTwo.addEventListener('mouseup', () => cropRect.setAttribute('data-resize', ""));;
cropRect.appendChild(ewResizeTwo);
} else {
if( null == cropRect.getAttribute('data-resize')){
cropRect.querySelector('#nwse-resize-one').style = boxStyle + `cursor:nwse-resize;margin-left:-6px;margin-top:-6px;position:absolute;`;
cropRect.querySelector('#ns-resize-one').style = boxStyle + `cursor:ns-resize;margin-left:${(par.width / 2) - 6}px; margin-top: -7px; position:absolute;`;
cropRect.querySelector('#nesw-resize-one').style = boxStyle + `cursor:nesw-resize;margin-left:${par.width - 6}px; margin-top: -6px;position:absolute; `
cropRect.querySelector('#ew-resize-one').style = boxStyle + `cursor:ew-resize;margin-left:${par.width - 7}px; margin-top: ${(par.height / 2) - 7}px;position:absolute;`
cropRect.querySelector('#nwse-resize-two').style = boxStyle + `cursor:nwse-resize;margin-left:${par.width - 7}px; margin-top: ${par.height - 7}px;position:absolute; `;
cropRect.querySelector('#ns-resize-two').style = boxStyle + `cursor:ns-resize;margin-left:${(par.width / 2) - 6}px; margin-top: ${par.height - 7}px;position:absolute; `;
cropRect.querySelector('#nesw-resize-two').style = boxStyle + `cursor:nesw-resize;margin-left:-7px; margin-top:${par.height - 7}px;position:absolute;`;
cropRect.querySelector('#ew-resize-two').style = boxStyle + `cursor:ew-resize;margin-left:-6px; margin-top: ${(par.height / 2) - 6}px; position:absolute;`;
}else{
let imgBdRect = imgEl.getBoundingClientRect();
let bdRect = cropRect.getBoundingClientRect();
if('cropRect' != e.target.id && imgBdRect.x <= e.clientX && imgBdRect.y <= e.clientY && (imgBdRect.x+imgBdRect.width) >= e.clientX && (imgBdRect.y+imgBdRect.height) >= e.clientY ){
if( null != cropRect.getAttribute('data-prev-mousepos') ){
let prevPos = cropRect.getAttribute('data-prev-mousepos').split('-');
let xDiff = Math.abs(parseInt( prevPos[0] ) - e.clientX);
let yDiff = Math.abs(parseInt( prevPos[1] ) - e.clientY);
switch(cropRect.getAttribute('data-resize')){
case "nwse-resize-one":
if(bdRect.x > e.clientX && bdRect.y > e.clientY){
cropRect.style.top = (parseInt(cropRect.style.top)-yDiff )+'px';
cropRect.style.left = (parseInt(cropRect.style.left)-xDiff)+'px';
cropRect.style.height = (parseInt(cropRect.style.height) + yDiff)+'px';
cropRect.style.width = (parseInt(cropRect.style.width)+xDiff)+'px';
}else{
cropRect.style.top = (parseInt(cropRect.style.top)+yDiff )+'px';
cropRect.style.left = (parseInt(cropRect.style.left)+xDiff)+'px';
cropRect.style.height = (parseInt(cropRect.style.height) - yDiff)+'px';
cropRect.style.width = (parseInt(cropRect.style.width)-xDiff)+'px';
}
break;
case "ns-resize-one":
if( bdRect.y > e.clientY){
cropRect.style.top = (parseInt(cropRect.style.top)-yDiff)+'px';
cropRect.style.height = (parseInt(cropRect.style.height) + yDiff)+'px';
}else{
cropRect.style.top = (parseInt(cropRect.style.top)+yDiff)+'px';
cropRect.style.height = (parseInt(cropRect.style.height) - yDiff)+'px';
}
break;
case "nesw-resize-one":
if(bdRect.y > e.clientY ){
cropRect.style.top = (parseInt(cropRect.style.top)-yDiff )+'px';
cropRect.style.height = (parseInt(cropRect.style.height) + yDiff)+'px';
cropRect.style.width = (parseInt(cropRect.style.width)+xDiff)+'px';
}else{
cropRect.style.top = (parseInt(cropRect.style.top)+yDiff )+'px';
cropRect.style.height = (parseInt(cropRect.style.height) - yDiff)+'px';
cropRect.style.width = (parseInt(cropRect.style.width)-xDiff)+'px';
}
break;
case "ew-resize-one":
if( (bdRect.x+ parseInt(bdRect.width) ) < e.clientX ){
cropRect.style.width = (parseInt(cropRect.style.width)+xDiff)+'px';
}else{
cropRect.style.width = (parseInt(cropRect.style.width)-xDiff)+'px';
}
break;
case "nwse-resize-two":
if( (bdRect.x+ parseInt(bdRect.width) ) < e.clientX ){
cropRect.style.height = (parseInt(cropRect.style.height)+ yDiff)+'px';
cropRect.style.width = (parseInt(cropRect.style.width)+xDiff)+'px';
}else{
cropRect.style.height = (parseInt(cropRect.style.height)- yDiff)+'px';
cropRect.style.width = (parseInt(cropRect.style.width)-xDiff)+'px';
}
break;
case "ns-resize-two":
if( (bdRect.y+ parseInt(bdRect.height) ) < e.clientY ){
cropRect.style.height = (parseInt(cropRect.style.height) + yDiff)+'px';
}else{
cropRect.style.height = (parseInt(cropRect.style.height) - yDiff)+'px';
}
break;
case "nesw-resize-two":
if((bdRect.y+parseInt(bdRect.height)) < e.clientY){
cropRect.style.left = (parseInt(cropRect.style.left)-xDiff)+'px';
cropRect.style.height = (parseInt(cropRect.style.height)+ yDiff)+'px';
cropRect.style.width = (parseInt(cropRect.style.width)+xDiff)+'px';
}else{
cropRect.style.left = (parseInt(cropRect.style.left)+xDiff)+'px';
cropRect.style.height = (parseInt(cropRect.style.height)- yDiff)+'px';
cropRect.style.width = (parseInt(cropRect.style.width)-xDiff)+'px';
}
break;
case "ew-resize-two":
if(bdRect.x > e.clientX){
cropRect.style.left = (parseInt(cropRect.style.left)-xDiff)+'px';
cropRect.style.width = (parseInt(cropRect.style.width)+xDiff)+'px';
}else{
cropRect.style.left = (parseInt(cropRect.style.left)+xDiff)+'px';
cropRect.style.width = (parseInt(cropRect.style.width)-xDiff)+'px';
}
break;
}
}
cropRect.setAttribute('data-start-xy', (bdRect.x - imgBdRect.x ) + ',' + (bdRect.y - imgBdRect.y));
cropRect.querySelector('#nwse-resize-one').style = boxStyle + `cursor:nwse-resize;margin-left:-6px;margin-top:-6px;position:absolute;`;
cropRect.querySelector('#ns-resize-one').style = boxStyle + `cursor:ns-resize;margin-left:${( cropRect.offsetWidth / 2) - 6}px; margin-top: -7px; position:absolute;`;
cropRect.querySelector('#nesw-resize-one').style = boxStyle + `cursor:nesw-resize;margin-left:${cropRect.offsetWidth - 6}px; margin-top: -6px;position:absolute; `
cropRect.querySelector('#ew-resize-one').style = boxStyle + `cursor:ew-resize;margin-left:${cropRect.offsetWidth - 7}px; margin-top: ${(cropRect.offsetHeight/ 2) - 7}px;position:absolute;`
cropRect.querySelector('#nwse-resize-two').style = boxStyle + `cursor:nwse-resize;margin-left:${cropRect.offsetWidth - 7}px; margin-top: ${cropRect.offsetHeight - 7}px;position:absolute; `;
cropRect.querySelector('#ns-resize-two').style = boxStyle + `cursor:ns-resize;margin-left:${(cropRect.offsetWidth / 2) - 6}px; margin-top: ${cropRect.offsetHeight - 7}px;position:absolute; `;
cropRect.querySelector('#nesw-resize-two').style = boxStyle + `cursor:nesw-resize;margin-left:-7px; margin-top:${cropRect.offsetHeight - 7}px;position:absolute;`;
cropRect.querySelector('#ew-resize-two').style = boxStyle + `cursor:ew-resize;margin-left:-6px; margin-top: ${(cropRect.offsetHeight / 2) - 6}px; position:absolute;`;
cropRect.setAttribute('data-prev-mousepos',`${e.clientX}-${e.clientY}`);
}
}
}
}
/*
*@param screenWidth window.innerWidth
*@param screenHeight window.innerHeight
*@param imageActualWidth actual width of image
*@param imageActualHeight actual height of image
*@return oobject with optimized image width and height
*/
getOptimizedImageSize(screenWidth, screenHeight, imageActualWidth, imageActualHeight) {
var imageScreenHeightRatio = 0,
imageScreenWidthRatio = 0,
optimizedImageHeight = 0,
optimizedImageWidth = 0;
var imgPercent = 0.95,
marginPercent = 0.05;
if ((imageActualWidth >= screenWidth) && (imageActualHeight >= screenHeight)) {
if (imageActualWidth >= imageActualHeight) {
if (imageActualWidth > imageActualHeight) {
imageScreenWidthRatio = imageActualWidth / screenWidth;
optimizedImageWidth = (imageActualWidth / imageScreenWidthRatio) - (marginPercent * screenWidth);
optimizedImageHeight = imageActualHeight * (optimizedImageWidth / imageActualWidth);
if (optimizedImageHeight >= (imgPercent * screenHeight)) {
imageScreenHeightRatio = screenHeight / imageActualHeight;
optimizedImageHeight = imageActualHeight * imageScreenHeightRatio - (marginPercent * screenHeight);
optimizedImageWidth = imageActualWidth * (optimizedImageHeight / imageActualHeight);
}
} else {
if (screenWidth > screenHeight) {
optimizedImageHeight = (imgPercent * screenHeight);
optimizedImageWidth = optimizedImageHeight;
} else if (screenHeight > screenWidth) {
optimizedImageWidth = (imgPercent * screenWidth);
optimizedImageHeight = optimizedImageWidth;
} else {
imageScreenHeightRatio = screenHeight / imageActualHeight;
optimizedImageHeight = imageActualHeight * imageScreenHeightRatio - (marginPercent * screenHeight);
optimizedImageWidth = imageActualWidth * (optimizedImageHeight / imageActualHeight);
}
}
} else {
imageScreenHeightRatio = imageActualHeight / screenHeight;
optimizedImageHeight = (imageActualHeight / imageScreenHeightRatio) - (marginPercent * screenHeight);
optimizedImageWidth = imageActualWidth * (optimizedImageHeight / imageActualHeight);
}
} else if (imageActualWidth >= screenWidth && imageActualHeight < screenHeight) {
imageScreenWidthRatio = screenWidth / imageActualWidth;
optimizedImageWidth = imageActualWidth * imageScreenWidthRatio - (marginPercent * screenWidth);
optimizedImageHeight = imageActualHeight * (optimizedImageWidth / imageActualWidth);
} else if (imageActualHeight >= screenHeight && imageActualWidth < screenWidth) {
imageScreenHeightRatio = screenHeight / imageActualHeight;
optimizedImageHeight = imageActualHeight * imageScreenHeightRatio - (marginPercent * screenHeight);
optimizedImageWidth = imageActualWidth * (optimizedImageHeight / imageActualHeight);
optimizedImageHeight = imageActualHeight * (optimizedImageWidth / imageActualWidth);
} else {
var avilableImageWidth = imgPercent * screenWidth;
var avilableImageHeight = imgPercent * screenHeight;
if (imageActualWidth >= avilableImageWidth && imageActualHeight >= avilableImageHeight) {
var imageAvilableWidthRatio = avilableImageWidth / imageActualWidth;
imageAvilableHeightRatio = avilableImageHeight / imageActualHeight;
optimizedImageWidth = avilableImageWidth * imageAvilableWidthRatio;
optimizedImageHeight = screenHeight * imageScreenHeightRatio;
} else if (imageActualWidth >= avilableImageWidth && imageActualHeight < avilableImageHeight) {
var imageAvilableWidthRatio = avilableImageWidth / imageActualWidth;
optimizedImageWidth = imageActualWidth * imageAvilableWidthRatio;
optimizedImageHeight = imageActualHeight * (optimizedImageWidth / imageActualWidth);
} else if (imageActualHeight >= avilableImageHeight && imageActualWidth < avilableImageWidth) {
var imageAvilableHeightRatio = avilableImageHeight / imageActualHeight;
optimizedImageHeight = imageActualHeight * imageAvilableHeightRatio;
optimizedImageWidth = imageActualWidth * (optimizedImageHeight / imageActualHeight);
} else {
optimizedImageWidth = imageActualWidth;
optimizedImageHeight = imageActualHeight;
}
optimizedImageHeight = imageActualHeight * (optimizedImageWidth / imageActualWidth);
}
//at last check it optimized width is still large
if (optimizedImageWidth > (imgPercent * screenWidth)) {
optimizedImageWidth = imgPercent * screenWidth;
optimizedImageHeight = imageActualHeight * (optimizedImageWidth / imageActualWidth);
}
return {
width: optimizedImageWidth,
height: optimizedImageHeight
};
}
/**
* Set crop canvas coordinate
*
*@param e mousmove event
*
*/
setCanvasCo(e) {
if (undefined != e.target.getAttribute('data-start-co')) {
let startCoArr = e.target.getAttribute('data-start-co').split(',');
let startX = parseInt(startCoArr[0]);
let startY = parseInt(startCoArr[1]);
let endX = e.offsetX < 0 ? 0 : e.offsetX;
let endY = e.offsetY < 0 ? 0 : e.offsetY;
let cropHeight = endY >= startY ? endY - startY : startY - endY;
let cropWidth = endX >= startX ? endX - startX : startX - endX;
if (0 !== cropWidth && 0 !== cropHeight) {
if (endX < startX && endY < startY) {
return {
el: e.target,
startX: endX,
startY: (startY - cropHeight),
height: cropHeight,
width: cropWidth
}
} else if (endX > startX && endY < startY) {
return {
el: e.target,
startX: startX,
startY: (startY - cropHeight),
height: cropHeight,
width: cropWidth
}
} else if (endX < startX && endY > startY) {
return {
el: e.target,
startX: endX,
startY: (endY - cropHeight),
height: cropHeight,
width: cropWidth
}
} else {