private void commit(ref MdElement ele)
{
if (ele.Text != null)
{
_elements.Add(ele);
}
ele = new MdElement();
ele.Line = _line + 1;
}
/// <summary>
/// 对命令进行扩展，返回 true 如果这次过程中有命令被展开或定义。
/// </summary>
/// <returns></returns>
private MdElement expandCommand(MdElement ele)
{
int col = 0;
_line = ele.Line;
string text = null;
var commands = findCommandElements(ele.Text).ToArray();
foreach (var cmd in commands)
{
if (!_commands.ContainsKey(cmd.Text))
{
continue;
}
if (cmd.ColStart > col + 1)
{
text += ele.Text.Substring(col, cmd.ColStart - 1 - col);
}
col = cmd.ColEnd + 1;
try {
for (int argi = 0; argi < cmd.Args.Length; ++argi)
{
MdElement tmp = new MdElement();
tmp.ElementType = MdElementType.Text; tmp.Line = -1; tmp.Text = cmd.Args[argi];
tmp = expandCommand(tmp);
cmd.Args[argi] = tmp.Text;
}
string fmt = string.Format(_commands [cmd.Text], cmd.Args);
text += fmt;
} catch {
warn("Arguments failure while expanding command `" + cmd.Text + "`.");
}
}
if (col < ele.Text.Length)
{
text += ele.Text.Substring(col);
}
ele.Text = text;
return(ele);
}
private void parseLines()
{
MdElement ele = new MdElement();
ele.Line = 1;
_elements = new List <MdElement> ();
string line = null;
for (_line = 1; _line <= _lines.Length; ++_line)
{
line = _lines [_line - 1].Trim();
if (string.IsNullOrWhiteSpace(line))
{
commit(ref ele);
continue;
}
if (line.Length == 1)
{
ele.Text = (ele.Text ?? "") + line;
continue;
}
switch (line [0])
{
case '#': // 带编号标题
int headlineLevel = 1;
for (; headlineLevel < line.Length && line [headlineLevel] == '#'; ++headlineLevel)
{
;
}
ele.Args = new string[] { "" + headlineLevel };
ele.ElementType = MdElementType.Headline;
ele.Text = line.Substring(headlineLevel).Trim();
if (ele.Text.EndsWith("#"))
{
ele.Text = ele.Text.Substring(0, ele.Text.IndexOf('#')).Trim();
}
commit(ref ele);
break;
case '-':
if (line.All(c => c == '-')) // 副标题
{
ele.ElementType = MdElementType.Headline;
ele.Args = new string[] { "-1" };
commit(ref ele);
}
else // 无编号列举项目
{
ele.ElementType = MdElementType.Ul;
ele.Text = (ele.Text ?? "") + line.Substring(1).Trim() + "\n";
}
break;
case '=':
if (line.All(c => c == '=')) // 主标题
{
ele.ElementType = MdElementType.Headline;
ele.Args = new string[] { "0" };
}
break;
case '>': // 引用
ele.ElementType = MdElementType.BlockQuote;
ele.Text = (ele.Text ?? "") + line.Substring(1).Trim();
break;
case '!': // 图像或表格
ele.ElementType = MdElementType.Image;
var mBang = Regex.Match(line, @"\!\[(\w+)\]\((.*?)\)");
if (mBang == null || string.IsNullOrEmpty(mBang.Groups [2].Value))
{
warn("Wrong arguments for `!` direction.");
continue;
}
ele.Text = mBang.Groups [1].Value;
ele.Args = mBang.Groups [2].Value.Split(' ');
if (ele.Args [0] == "") // 表格
{
ele.ElementType = MdElementType.Table;
}
else // 图像的话就直接提交了
{
commit(ref ele);
continue;
}
break;
default: // 普通的文本
if (line.StartsWith("%=") || line.StartsWith("%%")) // 定义命令
{
if (line.Length <= 2 || !line.Contains(":"))
{
warn("Insufficient arguments for command definition.");
continue;
}
string commandName = line.Substring(2);
commandName = commandName.Substring(0, commandName.IndexOf(':'));
string commandReplacement = line.Substring(line.IndexOf(':') + 1);
if (_commands.ContainsKey(commandName))
{
if (line.StartsWith("%%"))
{
_commands [commandName] = commandReplacement;
}
else
{
warn("Command `" + commandName + "` already defined.");
}
continue;
}
_commands.Add(commandName, commandReplacement);
continue;
}
if (line.StartsWith("1.")) // Ol
{
ele.ElementType = MdElementType.Ol;
ele.Text = (ele.Text ?? "") + line.Substring(2) + "\n";
break;
}
if (ele.Text == null)
{
ele.Text = "";
}
else if (!string.IsNullOrEmpty(ele.Text) && !ele.Text.EndsWith("\n"))
{
ele.Text += "\n";
}
ele.Text += line;
break;
}
}
}
private void renderElement(MdElement ele)
{
applyStyle("");
_line = ele.Line;
try {
switch (ele.ElementType)
{
case MdElementType.BlockQuote:
_builder.ParagraphFormat.LeftIndent = 10;
_builder.ParagraphFormat.SpaceBefore = 10;
_builder.ParagraphFormat.SpaceAfter = 10;
applyStyle("blockquote");
renderText(ele.Text);
break;
case MdElementType.Headline:
applyStyle("headline");
_builder.ParagraphFormat.SpaceBefore = 10;
if (int.Parse(ele.Args [0]) <= 0)
{
_builder.Font.Size = ele.Args[0] == "0" ? 24 : 18;
_builder.ParagraphFormat.Alignment = ParagraphAlignment.Center;
}
else
{
try {
_builder.ParagraphFormat.OutlineLevel = (OutlineLevel)Enum.Parse(typeof(OutlineLevel), "Level" + ele.Args[0]);
}catch {}
_builder.Font.Bold = true;
}
applyStyle("headline" + ele.Args[0]);
renderText(ele.Text);
break;
case MdElementType.Image:
if (ele.Args.Length == 0)
{
warn("Image instructive needs more than 0 arguments.");
}
else
{
var img = System.Drawing.Image.FromFile(ele.Args[0]);
applyStyle("image");
_builder.InsertImage(img, img.Width, img.Height);
_builder.InsertParagraph();
if (ele.Args.Length > 1)
{
_counters[ele.Args[1]]++;
_counters[ele.Text] = _counters[ele.Args[1]];
applyStyle("caption");
_builder.Write(ele.Args[1] + _counters[ele.Args[1]]);
_builder.Write(ele.Args.Length > 2 ? " " + ele.Args[2] : "");
}
}
break;
case MdElementType.Text:
renderText(ele.Text);
break;
case MdElementType.Command:
warn("Skipped command `" + ele.Text + "`; invalid position.");
break;
case MdElementType.Ol:
_builder.CurrentParagraph.ListFormat.List = _docx.Lists.Add(Aspose.Words.Lists.ListTemplate.NumberDefault);
var olitems = ele.Text.Split('\n');
for (int i = 0; i < olitems.Length - 1; ++i)
{
_builder.Write(olitems[i]);
_builder.InsertParagraph();
}
_builder.CurrentParagraph.ListFormat.List = null;
break;
case MdElementType.Ul:
_builder.CurrentParagraph.ListFormat.List = _docx.Lists.Add(Aspose.Words.Lists.ListTemplate.BulletDefault);
var ulitems = ele.Text.Split('\n');
for (int i = 0; i < ulitems.Length - 1; ++i)
{
_builder.Write(ulitems[i]);
_builder.InsertParagraph();
}
_builder.CurrentParagraph.ListFormat.List = null;
break;
case MdElementType.Table:
_builder.CellFormat.Borders.LineStyle = LineStyle.Single;
if (ele.Args.Length > 2)
{
_counters[ele.Text] = ++_counters[ele.Args[1]];
applyStyle("caption");
_builder.Write(ele.Args[1] + _counters[ele.Args[1]]);
_builder.Write(ele.Args.Length > 3 ? " " + ele.Args[2] : "");
_builder.InsertParagraph();
}
applyStyle(""); applyStyle("table");
_builder.StartTable();
string[] tableRows = ele.Text.Split('\n');
//Insert some table
for (int i = 1; i < tableRows.Length - 1; i++)
{
string row = tableRows[i];
foreach (var vp in Regex.Split(row, @"\t+"))
{
_builder.InsertCell();
_builder.Write(vp);
}
_builder.EndRow();
}
_builder.EndTable();
break;
}
} catch (Exception e) {
warn(e.Message);
}
_builder.InsertParagraph();
}
private IEnumerable <MdElement> findCommandElements(string text)
{
MdElement ele = null;
string argstr = "";
int balanced = 0;
List <string> argList = new List <string>();
for (int col = 0; col < text.Length; ++col)
{
switch (text [col])
{
case '\\':
++col;
break;
case '%': // 命令
if (balanced == 0)
{
ele = new MdElement();
ele.ElementType = MdElementType.Command;
ele.ColStart = col;
var mName = Regex.Match(text.Substring(col), @"\%(\w+)");
if (mName != null)
{
ele.Text = mName.Groups [1].Value;
col += ele.Text.Length;
}
else
{
argstr += "%";
}
}
else
{
argstr += '%';
}
break;
case '@':
ele = new MdElement {
ElementType = MdElementType.Command,
Text = "footnote"
};
break;
case '^':
ele = new MdElement {
ElementType = MdElementType.Command,
Text = "endnote"
};
break;
case '{':
if (ele != null)
{
++balanced;
}
if (balanced > 1)
{
argstr += '{';
}
break;
default:
if (ele != null)
{
if (char.IsWhiteSpace(text [col]) && balanced == 1)
{
argList.Add(argstr);
argstr = "";
continue;
}
if (text [col] == '}' && balanced > 0)
{
balanced--;
}
if (balanced == 0)
{
argList.Add(argstr);
ele.Args = argList.ToArray();
ele.ColEnd = col;
yield return(ele);
ele = null; argstr = ""; argList.Clear();
}
else
{
argstr += text [col];
}
}
break;
}
}
if (ele != null)
{
ele.ColEnd = text.Length - 1;
yield return(ele);
}
}
