MODULE FoxDocumentationHtml; (** AUTHOR ""; PURPOSE ""; *)

IMPORT Tree := FoxDocumentationTree, Scanner := FoxDocumentationScanner, Streams,Strings,  SYSTEM;

CONST MaxLevel=256;

TYPE
	ParagraphType=Tree.ParagraphType;
	ElementType= Tree.ElementType;
	Printer*= OBJECT
	VAR writer: Streams.Writer;
		chars: ARRAY MaxLevel OF CHAR; listLevel: LONGINT;
		currentLevel: LONGINT; printLabels: BOOLEAN;

		PROCEDURE &InitPrinter*(writer: Streams.Writer);
		BEGIN SELF.writer := writer; listLevel := 0; currentLevel := 0; printLabels := FALSE;
		END InitPrinter;

		PROCEDURE PrintLabel(section: Tree.Section);
		BEGIN
			writer.String('"#'); IF section.label = NIL THEN writer.String("_"); writer.Hex(SYSTEM.VAL(LONGINT,section),-8); ELSE WriteString(writer,section.label); END; writer.String('"')
		END PrintLabel;

		PROCEDURE Section*(section: Tree.Section);
		BEGIN
			IF section.label # NIL THEN
				writer.String('<a name="'); WriteString(writer, section.label); writer.String('"></a>');
			END;
			writer.String("<hr>");
			writer.String("<h"); writer.Int(section.level,0); writer.String(" id="); PrintLabel(section); writer.String(">");
			Text(section.title); writer.Ln;
			writer.String("</h"); writer.Int(section.level,1); writer.String(">");
			ParagraphList(section.contents);
			(*
			writer.String('<p><a href="#top"> Top of page </a></p>');
			*)
		END Section;

		PROCEDURE SectionList*(sections: Tree.Sections);
		VAR i: LONGINT;
		BEGIN
			FOR i := 0 TO sections.Length()-1 DO
				Section(sections.GetSection(i));
			END;
		END SectionList;

		PROCEDURE EndItem*(level: LONGINT);
		BEGIN
			WHILE listLevel > level DO
				ASSERT(chars[listLevel] # 0X);
				writer.String("</"); writer.Char(chars[listLevel]); writer.String("l>");writer.Ln;
				chars[listLevel] := 0X;
				DEC(listLevel)
			END;
		END EndItem;

		PROCEDURE BeginItem*(level: LONGINT; c: CHAR);
		BEGIN
			IF (c # chars[level]) & (level > 0) THEN (* change from bullet to numbers or vice versa *)
				EndItem(level-1)
			ELSE
				EndItem(level);
			END;
			WHILE listLevel<level DO
				writer.String("<"); writer.Char(c); writer.String("l>");writer.Ln;
				INC(listLevel);
				chars[listLevel] := c;
			END;
		END BeginItem;

		PROCEDURE Paragraph*(paragraph: Tree.Paragraph);
		VAR element: Tree.TextElement;
		BEGIN
			writer.Ln;
			CASE paragraph.type OF
			ParagraphType.Heading:
				EndItem(0);
				IF paragraph.label # NIL THEN
					writer.String('<a name="'); WriteString(writer, paragraph.label); writer.String('"></a>');
				END;
				writer.String("<h"); writer.Int(currentLevel + paragraph.level,0); writer.String(">"); Text(paragraph.text);
				writer.String("</h"); writer.Int(currentLevel + paragraph.level,0); writer.String(">");
			|ParagraphType.TextBlock:
				EndItem(0);
				writer.String("<p>"); Text(paragraph.text); writer.String("</p>");
			|ParagraphType.Number:
				BeginItem(paragraph.level, 'o');
				writer.String("<li>");
				Text(paragraph.text);
				writer.String("</li>");
			|ParagraphType.Description:
				BeginItem(listLevel+1(*paragraph.level*), 'd');
				writer.String("<dt><strong>"); Text(paragraph.description); writer.String("</strong></dt>");writer.Ln;
				writer.String("<dd>"); Text(paragraph.text); writer.String("</dd>");writer.Ln;
				EndItem(listLevel);
			|ParagraphType.Bullet:
				BeginItem(paragraph.level, 'u');
				writer.String("<li>");
				Text(paragraph.text);
				writer.String("</li>");
			|ParagraphType.Code:
				EndItem(0);
				writer.String("<pre>"); element := paragraph.text.GetElement(0); Text(paragraph.text); writer.String("</pre>");
			|ParagraphType.Table:
				EndItem(0);
				writer.String('<table>'); Text(paragraph.text); writer.String("</table>");
			|ParagraphType.Line:
				EndItem(0);
				writer.String("<hr/>");
			ELSE HALT(200)
			END;
			writer.Ln;
		END Paragraph;

		PROCEDURE ParagraphList*(paragraphs: Tree.Paragraphs);
		VAR i: LONGINT;
		BEGIN
			FOR i := 0 TO paragraphs.Length()-1 DO
				Paragraph(paragraphs.GetParagraph(i))
			END;
			EndItem(0);
		END ParagraphList;

		PROCEDURE WriteString(writer: Streams.Writer; string: Strings.String);
		VAR i: LONGINT; c: CHAR;
		BEGIN
			IF string = NIL THEN RETURN END;
			i := 0;
			WHILE string[i] # 0X DO
				c := string[i];
				IF c = '<' THEN writer.String("&lt")
				ELSIF c = '>' THEN writer.String("&gt")
				ELSIF c = Scanner.LF THEN writer.String("<BR>")
				ELSE
					writer.Char(c);
				END;
				INC(i);
			END;
		END WriteString;

		PROCEDURE PrintText*(textElement: Tree.TextElement);
		BEGIN
			IF textElement.text.Length() = 0 THEN
				WriteString(writer,textElement.string)
			ELSE
				Text(textElement.text);
			END;
		END PrintText;

		PROCEDURE TextElement*(textElement: Tree.TextElement);
		VAR type: ElementType;
		BEGIN
			type := textElement.type;
			(*
			IF separator # 0X THEN
				writer.Char(separator)
			END;
			*)
			CASE textElement.type OF
			ElementType.Default : PrintText(textElement);
			|ElementType.Whitespace: writer.String(" ");
			|ElementType.Italic : writer.String("<em>"); PrintText(textElement); writer.String("</em>");
			|ElementType.Bold : writer.String("<strong>"); PrintText(textElement); writer.String("</strong>");
			|ElementType.Underline : writer.String("<u>"); PrintText(textElement); writer.String("</u>");
			|ElementType.HeaderCell : writer.String("<th align='left'>"); PrintText(textElement); writer.String("</th>");
			|ElementType.DataCell : writer.String("<td>"); PrintText(textElement); writer.String("</td>");
			|ElementType.Row : writer.String("<tr>"); PrintText(textElement); writer.String("</tr>"); writer.Ln;
			|ElementType.Link:
				writer.String('<a href="'); writer.String("#"); WriteString(writer,textElement.string);  writer.String('">');
				IF textElement.text.Length()#0 THEN
					Text(textElement.text);
				ELSE WriteString( writer, textElement.string);
				END;
				writer.String("</a>");
			|ElementType.Label :
				writer.String('<a name="'); WriteString(writer, textElement.string); writer.String('"></a>');
			|ElementType.Code : writer.String("<code>"); PrintText(textElement); writer.String("</code>");
			|ElementType.LineBreak : writer.String("<br>");
			END;
		END TextElement;

		PROCEDURE Text*(text: Tree.Text);
		VAR element: Tree.TextElement; i: LONGINT;
		BEGIN
			FOR i := 0 TO text.Length()-1 DO
				element := text.GetElement(i);
				TextElement(element);
			END;
		END Text;

		PROCEDURE Document*(document: Tree.Document);
		BEGIN
			currentLevel := 0;
			writer.String(
				\"<?xml version=\"1.0\" encoding=\"UTF-8\" ?> \n"\
				\"<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Strict//EN\" \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd\"> \n"\
				\"<html xmlns=\"http://www.w3.org/1999/xhtml\"><head><title></title> \n"\);
			writer.String(
				\"<style>
				normal {
				font-family: Helvetica, Sans-Serif;
				}
			.bold {
				font-family: Helvetica, Sans-Serif;
				}
			H1 {
				color: #550088
				}
			H2 {
				font-family: Helvetica, Sans-Serif;
				color: #550088
				}
			H3 {
				font-family: Helvetica, Sans-Serif;
				color: #550088
				}
			H4 {
				font-family: Helvetica, Sans-Serif;
				color: #550088
				}
			A {
				color: #550088
				}
				</style>
				</head>
				<body>
			"\);

			currentLevel := 1; printLabels := FALSE;
			(*
			writer.String("<h"); writer.Int(currentLevel+1,1); writer.String(">Contents</h"); writer.Int(currentLevel+1,0); writer.String(">");
			*)
			ParagraphList(document.description);
			printLabels := TRUE; EndItem(0);
			SectionList(document.sections);
			writer.String("</body></html>"); writer.Ln;
		END Document;

	END Printer;

END FoxDocumentationHtml.