正则表达式的新手。我知道如何查找所有结束标记/<\/.*?>/g,
但我需要在所有结束标记后添加空格。这只会删除所有结束标记:str = str.replace(/<\/.*?>/g, ' ');
***稍后添加
好的,这是整个脚本。我无法在此发布。您可以在jsfiddle上查看它:https://jsfiddle.net/bw6yfc7g/3/我希望它仅在关闭和开始标记一个接一个地运行时自动添加空格。换句话说,当在Bold之后发布下划线时,标签应如下所示:<b></b> <u></u>
但是当它们彼此张贴时,它们应该如下所示:<b><u></u></b>
没有空格。
答案 0 :(得分:1)
以下是使用DOM实现此目的的方法:
function textNodesUnder(el){
var n, walk=document.createTreeWalker(el,NodeFilter.SHOW_ELEMENT,null,false);
while(n=walk.nextNode())
{
if (n.nodeName !== "MYELT")
{
ws_node = document.createTextNode(" ");
n.parentNode.insertBefore(ws_node, n.nextSibling);
}
}
return el.firstChild.innerHTML;
}
function addWsNodes(s) {
var doc = document.createDocumentFragment();
var wrapper = document.createElement('myelt');
wrapper.innerHTML = s;
doc.appendChild( wrapper );
return textNodesUnder(doc);
}
var s = "This is a <span>test</span>and another<br>test <span>here</span>.";
console.log(addWsNodes(s));
// => This is a <span>test</span> and another<br> test <span>here</span> .
这里,HTML字符串输入被包含在一个带有myelt
名称的假元素中,然后将其添加到传递给树步行者的文档片段中。在那里,我们只考虑元素节点(SHOW_ELEMENT
),并在其后面插入一个空白元素。您可以调整文本内容(插入选项卡,空格或换行符)。
<强>更新强>
您的代码已经很好,您只需要检查是否在文本的末尾插入了一些内容。我添加了extra_ws
变量,只有当起始位置是现有文本的结尾时才为其指定空格。如果我们不在字符串的开头,我还要添加一个检查:
if (startPos === txta.value.length && startPos > 0) ...
function addTagSel(tag, idelm) {
var tag_type = new Array('<', '>'); // for BBCode tag, replace with: new Array('[', ']');
var txta = document.getElementById('wmd-input');
var start = tag_type[0] + tag + tag_type[1];
var end = tag_type[0] +'/'+ tag + tag_type[1];
var IE = /*@cc_on!@*/false; // this variable is false in all browsers, except IE
var extra_ws = ""; // ADDED
var offst = 0;
if (IE) {
var r = document.selection.createRange();
var tr = txta.createTextRange();
var tr2 = tr.duplicate();
tr2.moveToBookmark(r.getBookmark());
tr.setEndPoint('StartToEnd',tr2);
var tag_seltxt = start + r.text + end;
var the_start = txta.value.replace(/[\r\n]/g,'.').indexOf(r.text.replace(/[\r\n]/g,'.'),tr.text.length);
if (start === txta.value.length && startPos > 0) { // HERE
extra_ws = " "; // UP TO HERE
offst = extra_ws.length;
}
txta.value = txta.value.substring(0, the_start) + extra_ws + tag_seltxt + txta.value.substring(the_start + tag_seltxt.length, txta.value.length); // AND HERE
var pos = txta.value.length - end.length; // Sets location for cursor position
tr.collapse(true);
tr.moveEnd('character', pos + offst); // start position
tr.moveStart('character', pos + offst); // end position
tr.select(); // selects the zone
}
else if (txta.selectionStart || txta.selectionStart == "0") {
var startPos = txta.selectionStart;
var endPos = txta.selectionEnd;
var tag_seltxt = start + txta.value.substring(startPos, endPos) + end;
if (startPos === txta.value.length && startPos > 0) {
extra_ws = " ";
offst = extra_ws.length;
}
txta.value = txta.value.substring(0, startPos) + extra_ws + tag_seltxt + '\u200C' + txta.value.substring(endPos, txta.value.length);
// txta.value = addWsNodes(txta.value);
// Place the cursor between formats in #txta
txta.setSelectionRange((endPos+start.length+offst),(endPos+start.length+offst));
txta.focus();
}
return tag_seltxt;
}
document.getElementById('big').onclick = function() {
var tag_seltxt = addTagSel('big');
return tag_seltxt;
}
document.getElementById('b').onclick = function() {
var tag_seltxt = addTagSel('b');
return tag_seltxt;
}
document.getElementById('i').onclick = function() {
var tag_seltxt = addTagSel('i');
return tag_seltxt;
}
document.getElementById('u').onclick = function() {
var tag_seltxt = addTagSel('u');
return tag_seltxt;
}
document.getElementById('del').onclick = function() {
var tag_seltxt = addTagSel('del');
return tag_seltxt;
};
.edit_button {
display: inline-block;
color: black;
padding: 5px;
}
<a class="edit_button" id="big"> <span class="titleicon"></span> </a>
<a class="edit_button" id="b"> B </a>
<a class="edit_button" id="i"> <i>I</i> </a>
<a class="edit_button" id="u"> <u>U</u> </a>
<a class="edit_button" id="del"> <del>S</del> </a>
<textarea id="wmd-input"></textarea>