我正在开发一个JavaScript扩展，它应该以某种方式包装所选文本并将其发送到我的服务器。完成“包装”，以便服务器可以识别突出显示的文本的确切位置，即使存在重复项。
我按照此链接How to change CSS of selected text using Google Chrome Extension，以便能够获取所选文字。之后我按照这种方法How to get selected html text with javascript?，特别是选择的答案，来获得innerHTML。问题在于，当选择跨越不同的div时，它会破坏DOM，或者正如zyklus在该答案中所说的那样“将节点减半并产生额外的跨度会产生副作用。”
举个例子，
<div id="IntroDiv">
<p>
<img src="http://localhost:9000/Theme/Images/Intro/logo.png">
<br><br>
A neat th<f5e975aa551d1ae4e91e8ce9><div id="IntroDiv"><p>eme for start-ups and small corporations.
</p>
</div>
<div id="ProjectsSlider">
<div id="ProjectsSliderContent">
<p class="Title">Projects</p>
<p class="Subtitle">Samples O</p></div></div></f5e975aa551d1ae4e91e8ce9>eme for start-ups and small corporations.
</p>
</div>
<div id="ProjectsSlider">
<div id="ProjectsSliderContent">
<p class="Title">Projects</p>
<p class="Subtitle">Samples Of Our Work</p>
<div id="SliderContainer">
<div class="LeftArrow"></div>
<div class="RightArrow"></div>
<div class="ThreeD swiper-container stop-swiping">
<div class="swiper-wrapper swiper-no-swiping" style="width: 2365px; height: 285px; transform: translate3d(-430px, 0px, 0px); -webkit-transform: translate3d(-430px, 0px, 0px); transition-duration: 0s; -webkit-transition-duration: 0s;"><div class="swiper-slide swiper-slide-duplicate" style="width: 215px; height: 285px; transition-duration: 0ms; -webkit-transition-duration: 0ms; transform: translate3d(0px, 0px, -336px) rotateX(0deg) rotateY(-75deg); -webkit-transform: translate3d(0px, 0px, -336px) rotateX(0deg) rotateY(-75deg); z-index: -2; background-image: url(http://placehold.it/215x270/);">Project 3</div><div class="swiper-slide swiper-slide-duplicate" style="width: 215px; height: 285px; transition-duration: 0ms; -webkit-transition-duration: 0ms; transform: translate3d(0px, 0px, -224px) rotateX(0deg) rotateY(-50deg); -webkit-transform: translate3d(0px, 0px, -224px) rotateX(0deg) rotateY(-50deg); z-index: -1; background-image: url(http://placehold.it/215x270/);">Project 4</div><div class="swiper-slide swiper-slide-duplicate swiper-slide-visible swiper-slide-active" style="width: 215px; height: 285px; transition-duration: 0ms; -webkit-transition-duration: 0ms; transform: translate3d(0px, 0px, -112px) rotateX(0deg) rotateY(-25deg); -webkit-transform: translate3d(0px, 0px, -112px) rotateX(0deg) rotateY(-25deg); z-index: 0; background-image: url(http://placehold.it/215x270/);">Project 5</div> <!-- Add your slides here. You're free to have different styles or content -->
<div class="swiper-slide swiper-slide-visible" style="width: 215px; height: 285px; transition-duration: 0ms; -webkit-transition-duration: 0ms; transform: translate3d(0px, 0px, 0px) rotateX(0deg) rotateY(0deg); -webkit-transform: translate3d(0px, 0px, 0px) rotateX(0deg) rotateY(0deg); z-index: 1; background-image: url(http://placehold.it/215x270/);">Project 1</div>
<div class="swiper-slide swiper-slide-visible" style="width: 215px; height: 285px; transition-duration: 0ms; -webkit-transition-duration: 0ms; transform: translate3d(0px, 0px, -112px) rotateX(0deg) rotateY(25deg); -webkit-transform: translate3d(0px, 0px, -112px) rotateX(0deg) rotateY(25deg); z-index: 0; background-image: url(http://placehold.it/215x270/);">Project 2</div>
<div class="swiper-slide" style="width: 215px; height: 285px; transition-duration: 0ms; -webkit-transition-duration: 0ms; transform: translate3d(0px, 0px, -224px) rotateX(0deg) rotateY(50deg); -webkit-transform: translate3d(0px, 0px, -224px) rotateX(0deg) rotateY(50deg); z-index: -1; background-image: url(http://placehold.it/215x270/);">Project 3</div>
<div class="swiper-slide" style="width: 215px; height: 285px; transition-duration: 0ms; -webkit-transition-duration: 0ms; transform: translate3d(0px, 0px, -336px) rotateX(0deg) rotateY(75deg); -webkit-transform: translate3d(0px, 0px, -336px) rotateX(0deg) rotateY(75deg); z-index: -2; background-image: url(http://placehold.it/215x270/);">Project 4</div>
<div class="swiper-slide" style="width: 215px; height: 285px; transition-duration: 0ms; -webkit-transition-duration: 0ms; transform: translate3d(0px, 0px, -448px) rotateX(0deg) rotateY(100deg); -webkit-transform: translate3d(0px, 0px, -448px) rotateX(0deg) rotateY(100deg); z-index: -3; background-image: url(http://placehold.it/215x270/);">Project 5</div>
<div class="swiper-slide swiper-slide-duplicate" style="width: 215px; height: 285px; transition-duration: 0ms; -webkit-transition-duration: 0ms; transform: translate3d(0px, 0px, -560px) rotateX(0deg) rotateY(125deg); -webkit-transform: translate3d(0px, 0px, -560px) rotateX(0deg) rotateY(125deg); z-index: -4; background-image: url(http://placehold.it/215x270/);">Project 1</div><div class="swiper-slide swiper-slide-duplicate" style="width: 215px; height: 285px; transition-duration: 0ms; -webkit-transition-duration: 0ms; transform: translate3d(0px, 0px, -672px) rotateX(0deg) rotateY(150deg); -webkit-transform: translate3d(0px, 0px, -672px) rotateX(0deg) rotateY(150deg); z-index: -5; background-image: url(http://placehold.it/215x270/);">Project 2</div><div class="swiper-slide swiper-slide-duplicate" style="width: 215px; height: 285px; transition-duration: 0ms; -webkit-transition-duration: 0ms; transform: translate3d(0px, 0px, -784px) rotateX(0deg) rotateY(175deg); -webkit-transform: translate3d(0px, 0px, -784px) rotateX(0deg) rotateY(175deg); z-index: -6; background-image: url(http://placehold.it/215x270/);">Project 3</div></div>
<div class="SeePhotos"></div>
</div>
</div>
<ul id="ThreeDSwiperBullets"><li id="0" class="active"></li><li id="1"></li><li id="2"></li><li id="3"></li><li id="4"></li></ul> <!-- Where slider bullets are automatically added according to the slider by JavaScript, Index.js file -->
</div>
</div>
我在这里使用f5e975aa551d1ae4e91e8ce9来识别文本，就像在通常的网页中很可能不存在的任何类型的唯一文本一样。如上所述，“IntroDiv”有两次，还有“ProjectsSlider”。在调用任何函数之前，这是页面的相同部分。
<div id="IntroDiv">
<p>
<img src="Theme/Images/Intro/logo.png">
<br/><br/>
A neat theme for start-ups and small corporations.
</p>
</div>
<div id="ProjectsSlider">
<div id="ProjectsSliderContent">
<p class="Title">Projects</p>
<p class="Subtitle">Samples Of Our Work</p>
<div id="SliderContainer">
<div class="LeftArrow"></div>
<div class="RightArrow"></div>
<div class="ThreeD swiper-container stop-swiping">
<div class="swiper-wrapper swiper-no-swiping"> <!-- Add your slides here. You're free to have different styles or content -->
<div class="swiper-slide" style="background-image:url('http://placehold.it/215x270/');">Project 1</div>
<div class="swiper-slide" style="background-image:url('http://placehold.it/215x270/');">Project 2</div>
<div class="swiper-slide" style="background-image:url('http://placehold.it/215x270/');">Project 3</div>
<div class="swiper-slide" style="background-image:url('http://placehold.it/215x270/');">Project 4</div>
<div class="swiper-slide" style="background-image:url('http://placehold.it/215x270/');">Project 5</div>
</div>
<div class="SeePhotos"></div>
</div>
</div>
<ul id="ThreeDSwiperBullets"></ul> <!-- Where slider bullets are automatically added according to the slider by JavaScript, Index.js file -->
</div>
</div>
这是我的代码。
//save_last_element.js
document.body.addEventListener('contextmenu', function(e) {
LAST_SELECTION = window.getSelection().getRangeAt(0);
}, false);
//script.js
if (LAST_SELECTION) {
var mySelection = LAST_SELECTION.cloneRange();
var selectionContents = mySelection.cloneContents();
var div = document.createElement("f5e975aa551d1ae4e91e8ce9");
div.appendChild(selectionContents);
mySelection.insertNode(div);
}
有没有办法避免弄乱DOM？我可以通过完全不同的方法以某种方式识别所选文本的位置吗？
答案 0 :(得分：1)
要提取所选文本，您可以仅选择文本节点并将它们连接起来。
var content = window.getSelection().getRangeAt(0).cloneContents();
var treeWalker = document.createTreeWalker(content, NodeFilter.SHOW_TEXT);
var text = '';
while (treeWalker.nextNode()) {
text = text.concat(treeWalker.currentNode.nodeValue);
}
console.log(text);
修改
如何使用标识符字符串包装选择：
String.prototype.splice = function( idx, rem, s ) {
return (this.slice(0,idx) + s + this.slice(idx + Math.abs(rem)));
};
var range = window.getSelection().getRangeAt(0);
range.startContainer.nodeValue = range.startContainer.nodeValue.splice(range.startOffset, 0, '[highlight]');
range.endContainer.nodeValue = range.endContainer.nodeValue.splice(range.endOffset, 0, '[/highlight]');
splice由this post
答案 1 :(得分：1)
所以，经过大量的尝试，我可以做到。
var myAnchorNodeValue = window.getSelection().anchorNode.nodeValue;
var myAnchorOffset = window.getSelection().anchorOffset
var myFocusOffset = window.getSelection().focusOffset
var myFocusNodeLength = window.getSelection().focusNode.nodeValue.length;
window.getSelection().anchorNode.nodeValue = myAnchorNodeValue.slice(0, myAnchorOffset) + "[IDENTIFY]" + myAnchorNodeValue.slice(myAnchorOffset);
var myFocusNodeValue = window.getSelection().focusNode.nodeValue;
if(window.getSelection().focusNode.nodeValue.length - myFocusNodeLength > 0) {
myFocusOffset += window.getSelection().focusNode.nodeValue.length - myFocusNodeLength;
}
window.getSelection().focusNode.nodeValue = myFocusNodeValue.slice(0, myFocusOffset) + "[/IDENTIFY]" + myFocusNodeValue.slice(myFocusOffset);
LAST_SELECTION = window.getSelection().getRangeAt(0);
myDocument = document.documentElement.innerHTML;
完美无缺。