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Chapter05_02.html
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Chapter05_02.html
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<!DOCTYPE html>
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
<script src="jquery-1.8.3.min.js" type="text/javascript"></script>
<script type="text/javascript">
function GetText(filePath) {
var ForReading = 1;
var fso = new ActiveXObject("Scripting.FileSystemObject");
var f = fso.OpenTextFile(filePath, ForReading);
return(f.ReadAll());
}
// 处理段落
function processParagraph(paragraph) {
var header = 0;
while (paragraph.charAt(header) == "%") {
header++;
}
if (header > 0) {
return { type: "h" + header, content: splitParagraph(paragraph.slice(header + 1)) };
} else {
return { type: "p", content: splitParagraph(paragraph) };
}
}
// 分割段落(递归)
function splitParagraphOld(text) {
function split(pos) {
if (pos == text.length) {
return [];
}
else if (text.charAt(pos) == "*") {
var end = findClosing("*", pos + 1),
frag = { type: "emphasized", content: text.slice(pos + 1, end) };
return [frag].concat(split(end + 1));
}
else if (text.charAt(pos) == "{") {
var end = findClosing("}", pos + 1),
frag = { type: "footnote", content: text.slice(pos + 1, end) };
return [frag].concat(split(end + 1));
} else {
var end = findOpeningOrEnd(pos),
frag = { type: "normal", content: text.slice(pos, end) };
return [frag].concat(split(end));
}
}
function findClosing(character, from) {
var end = text.indexOf(character, from);
if (end == -1) throw new Error("Missing closing '" + character + "'");
else return end;
}
function findOpeningOrEnd(from) {
function indexOrEnd(character) {
var index = text.indexOf(character, from);
return index == -1 ? text.length : index;
}
return Math.min(indexOrEnd("*"), indexOrEnd("{"));
}
return split(0);
}
// 分割段落(更好的形式，while 循环，非递归)
function splitParagraph(text) {
var pos = 0, fragments = [];
while (pos < text.length) {
if (text.charAt(pos) == ("*")) {
var end = findClosing("*", pos + 1);
fragments.push({ type: "emphasized", content: text.slice(pos + 1, end) });
pos = end + 1;
}
else if (text.charAt(pos) == "{") {
var end = findClosing("}", pos + 1);
fragments.push({ type: "footnote", content: text.slice(pos + 1, end) });
pos = end + 1;
} else {
var end = findOpeningOrEnd(pos);
fragments.push({ type: "normal", content: text.slice(pos, end) });
pos = end;
}
}
function findClosing(character, from) {
var end = text.indexOf(character, from);
if (end == -1) throw new Error("Missing closing '" + character + "'");
else return end;
}
function findOpeningOrEnd(from) {
function indexOrEnd(character) {
var index = text.indexOf(character, from);
return index == -1 ? text.length : index;
}
return Math.min(indexOrEnd("*"), indexOrEnd("{"));
}
return fragments;
}
// 抽取脚注
function extractFootnotes(paragraphs) {
var footnotes = [];
var currentNote = 0;
function replaceFootnote(fragment) {
if (fragment.type == "footnote") {
currentNote++;
footnotes.push(fragment);
fragment.number = currentNote;
return { type: "reference", number: currentNote };
} else {
return fragment;
}
}
foreach(paragraphs, function (paragraph) {
paragraph.content = map(replaceFootnote, paragraph.content);
});
return footnotes;
}
// 填充HTML元素
function tag(name, content, attributes) {
return { name: name, attributes: attributes, content: content };
}
// 填充链接元素
function link(target, text) {
return tag("a", [text], { href: target });
}
// 填充文档内容
function htmlDoc(title, bodyContent) {
return tag("html", [tag("head", [tag("title", [title])]), tag("body", bodyContent)]);
}
// 替换转义字符
function escapeHTML(text) {
var replacements = [
[/&/g, "&"],
[/"/g, """],
[/</g, "<"],
["/>/g", ">"]
];
foreach(replacements, function (replace) {
text = text.replace(replace[0], replace[1]);
});
return text;
}
// 渲染属性
function renderAttributes(attributes) {
if (attributes == null) return "";
var result = [];
for (var name in attributes) {
result.push(" " + name + "=\"" + escapeHTML(attributes[name]) + "\"");
}
return result.join("");
}
// 渲染HTML文档
function renderHTML(element) {
var pieces = [];
function render(element) {
// 文本节点
if (typeof element == "string") {
pieces.push(escapeHTML(element));
}
// 不带内容的标签
else if (!element.content || element.content.length == 0) {
pieces.push("<" + element.name + renderAttributes(element.attributes) + "/>");
}
// 带有内容的标签
else {
pieces.push("<" + element.name + renderAttributes(element.attributes) + ">");
foreach(element.content, render);
pieces.push("</" + element.name + ">");
}
}
render(element);
return pieces.join("");
}
// 渲染片段
function renderFragment(fragment) {
var result = "";
if (fragment.type == "reference") {
result = tag("sup", [link("#footnote" + fragment.number, String(fragment.number))]);
} else if (fragment.type == "emphasised") {
result = tag("em", [fragment.content]);
}
else if (fragment.type == "normal") {
result = fragment.content;
}
return result;
}
// 渲染段落
function renderParagraph(paragraph) {
return tag(paragraph.type, map(renderFragment, paragraph.content));
}
// 渲染脚注
function renderFootnote(footnote) {
var anchor = tag("a", [], { name: "footnote" + footnote.number });
var number = "[" + footnote.number + "]";
return tag("p", [tag("small", [anchor, number, footnote.content])]);
}
// 渲染文件
function renderFile(file, title) {
var paragraphs = map(processParagraph, file.split("\r\n\r\n"));
var footnotes = map(renderFootnote, extractFootnotes(paragraphs));
var body = map(renderParagraph, paragraphs).concat(footnotes);
return renderHTML(htmlDoc(title, body));
}
function map(func, array) {
var result = [];
foreach(array, function (element) {
result.push(func(element));
});
return result;
}
function foreach(array, action) {
for (var i = 0; i < array.length; i++) {
action(array[i]);
}
}
$(function () {
var text = GetText("D:/Tim/WebstormProjects/JavaScriptStudy/TheBookOfProgramming.txt");
var htmlContent = renderFile(text, "测试标题");
var iframe1 = document.frames["iframe1"];
iframe1.src = function () {
var subDocument = iframe1.document;
subDocument.open();
subDocument.write(htmlContent);
subDocument.close();
}();
});
</script>
</head>
<body>
<iframe name="iframe1" id="iframe1" src="" style="width: 100%;height:1000px;"></iframe>
<div id="divFormatText">
</div>
</body>
</html>