我一直致力于一个文本区的格式化工具栏,就像这个网站上用来写问题的工具栏(带有粗体、斜体、下划线按钮)。唯一的区别是,我需要的按钮,使文本实际上是粗体,而不仅仅是添加一个粗体标签。我需要的是类似于Instructables.com丰富的评论编辑器,或newgrounds.com评论编辑器,或谷歌文档。有没有人知道如何使文本区域中的一些文本显示为粗体、斜体或下划线,但保留其余部分?
发布于 2011-07-28 08:15:36
有很多javascript所见即所得编辑器的实现。FCKEditor (现在的CKEditor)是第一批。TinyMCE流行了很长一段时间。我最近使用了TinyEditor。
还有nicedit,列出了10个编辑器并对here进行了比较,更不用说之前在这里提供的关于what's available问题的答案。
他们不需要产生超文本标记语言--也有编辑器产生Wiki markup
为什么要重新发明轮子呢?
发布于 2011-07-28 12:37:19
我发现如何创建自己的富文本编辑器,就像这样:
(function ($) {
if (typeof $.fn.rte === "undefined") {
var defaults = {
content_css_url: "rte.css",
media_url: "images",
dot_net_button_class: null,
max_height: 350
};
$.fn.rte = function (options) {
$.fn.rte.html = function (iframe) {
return iframe.contentWindow.document.getElementsByTagName("body")[0].innerHTML;
};
var opts = $.extend(defaults, options);
return this.each(function () {
var textarea = $(this);
var iframe;
var myID = textarea.attr("id");
var settings = $.meta ? $.extend({}, opts, textarea.data()) : opts;
var sel = {
cmdBtnSelector: "." + settings.dot_net_button_class
};
function enableDesignMode() {
var content = textarea.val();
if ($.trim(content) == '') {
content = '<br />';
}
if (iframe) {
textarea.hide();
$(iframe).contents().find("body").html(content);
$(iframe).show();
$("#toolbar-" + myID).remove();
textarea.before(toolbar());
return true;
}
iframe = document.createElement("iframe");
iframe.frameBorder = 0;
iframe.frameMargin = 0;
iframe.framePadding = 0;
iframe.height = 200;
if (textarea.attr('class')) iframe.className = textarea.attr('class');
if (textarea.attr('id')) iframe.id = myID;
if (textarea.attr('name')) iframe.title = textarea.attr('name');
textarea.after(iframe);
var css = "";
if (settings.content_css_url) {
css = "<link type='text/css' rel='stylesheet' href='" + settings.content_css_url + "' />";
}
var doc = "<html><head>" + css + "</head><body class='frameBody'>" + content + "</body></html>";
tryEnableDesignMode(doc, function () {
$("#toolbar-" + myID).remove();
textarea.before(toolbar());
textarea.hide();
});
}
function tryEnableDesignMode(doc, callback) {
if (!iframe) {
return false;
}
try {
iframe.contentWindow.document.open();
iframe.contentWindow.document.write(doc);
iframe.contentWindow.document.close();
} catch (error) {
console.log(error)
}
if (document.contentEditable) {
iframe.contentWindow.document.designMode = "On";
callback();
return true;
} else if (document.designMode != null) {
try {
iframe.contentWindow.document.designMode = "on";
callback();
return true;
} catch (error) {
console.log(error)
}
}
setTimeout(function () {
tryEnableDesignMode(doc, callback)
}, 250);
return false;
}
function disableDesignMode(submit) {
var content = $(iframe).contents().find("body").html();
if ($(iframe).is(":visible")) {
textarea.val(content);
}
if (submit !== true) {
textarea.show();
$(iframe).hide();
}
}
function toolbar() {
var tb = $("<div class='rte-toolbar' id='toolbar-" + myID + "'><div>\
<p>\
<select>\
<option value=''>Block style</option>\
<option value='p'>Paragraph</option>\
<option value='h3'>Title</option>\
</select>\
</p>\
<p>\
<a href='#' class='bold'><img src='" + settings.media_url + "text_bold.png' alt='bold' title='Bold' /></a>\
<a href='#' class='italic'><img src='" + settings.media_url + "text_italic.png' alt='italic' title='Italicize' /></a>\
</p>\
<p>\
<a href='#' class='unorderedlist'><img src='" + settings.media_url + "text_list_bullets.png' alt='unordered list' title='Unordered List' /></a>\
<a href='#' class='link'><img src='" + settings.media_url + "link.png' alt='link' title='Hyperlink' /></a>\
<a href='#' class='image'><img src='" + settings.media_url + "image.png' alt='image' title='Image' /></a>\
<a href='#' class='disable'><img src='" + settings.media_url + "code.png' alt='close rte' title='View Code' /></a>\
</p></div></div>");
$('select', tb).change(function () {
var index = this.selectedIndex;
if (index != 0) {
var selected = this.options[index].value;
formatText("formatblock", '<' + selected + '>');
}
});
$('.bold', tb).click(function () {
formatText('bold');
return false;
});
$('.italic', tb).click(function () {
formatText('italic');
return false;
});
$('.unorderedlist', tb).click(function () {
formatText('insertunorderedlist');
return false;
});
$('.link', tb).click(function () {
var p = prompt("URL:");
if (p) formatText('CreateLink', p);
return false;
});
$('.image', tb).click(function () {
var p = prompt("image URL:");
if (p) formatText('InsertImage', p);
return false;
});
$('.disable', tb).click(function () {
disableDesignMode();
var edm = $('<a href="#">Enable design mode</a>');
tb.empty().append(edm);
edm.click(function (e) {
e.preventDefault();
enableDesignMode();
$(this).remove();
});
return false;
});
if (settings.dot_net_button_class != null) {
var cmdBtn = $(iframe).parents('form').find(sel.cmdBtnSelector);
cmdBtn.click(function () {
disableDesignMode(true);
});
} else {
$(iframe).parents('form').submit(function () {
disableDesignMode(true);
});
}
var iframeDoc = $(iframe.contentWindow.document);
var select = $('select', tb)[0];
iframeDoc.mouseup(function () {
setSelectedType(getSelectionElement(), select);
return true;
});
iframeDoc.keyup(function () {
setSelectedType(getSelectionElement(), select);
var body = $('body', iframeDoc);
if (body.scrollTop() > 0) {
var iframe_height = parseInt(iframe.style['height']);
if (isNaN(iframe_height)) {
iframe_height = 0;
}
var h = Math.min(opts.max_height, iframe_height + body.scrollTop()) + 'px';
iframe.style['height'] = h;
}
return true;
});
return tb;
}
function formatText(command, option) {
iframe.contentWindow.focus();
try {
iframe.contentWindow.document.execCommand(command, false, option);
} catch (e) {
console.log(e)
}
iframe.contentWindow.focus();
}
function setSelectedType(node, select) {
while (node.parentNode) {
var nName = node.nodeName.toLowerCase();
for (var i = 0; i < select.options.length; i++) {
if (nName == select.options[i].value) {
select.selectedIndex = i;
return true;
}
}
node = node.parentNode;
}
select.selectedIndex = 0;
return true;
}
function getSelectionElement() {
if (iframe.contentWindow.document.selection) {
selection = iframe.contentWindow.document.selection;
range = selection.createRange();
try {
node = range.parentElement();
} catch (e) {
return false;
}
} else {
try {
selection = iframe.contentWindow.getSelection();
range = selection.getRangeAt(0);
} catch (e) {
return false;
}
node = range.commonAncestorContainer;
}
return node;
}
enableDesignMode();
});
};
}
})(jQuery);
发布于 2011-07-28 07:55:11
contentEditable
DOM属性用于使文档或其中的一节可编辑。这不适用于<textarea>
;更常见的情况是创建一个<iframe>
,并将其中的文档用作编辑器。
Mark Pilgrim在网络超文本应用技术工作组的博客上有an article explaining it。它包括显示一些正在使用的功能的an example page。
https://stackoverflow.com/questions/6852602
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