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161 changes: 161 additions & 0 deletions
161
...ulticonverter/src/main/java/biblemulticonverter/format/AbstractStructuredHTMLVisitor.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,161 @@ | ||
| package biblemulticonverter.format; | ||
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| import java.io.IOException; | ||
| import java.io.Writer; | ||
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| import biblemulticonverter.data.FormattedText; | ||
| import biblemulticonverter.data.FormattedText.ExtendedLineBreakKind; | ||
| import biblemulticonverter.data.FormattedText.LineBreakKind; | ||
| import biblemulticonverter.data.FormattedText.Visitor; | ||
| import biblemulticonverter.format.AbstractStructuredHTMLVisitor.StructuredHTMLState; | ||
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| /** | ||
| * Helper class for converting {@link FormattedText} to structured HTML. Unlike | ||
| * {@link AbstractHTMLVisitor}, this also implements headlines and line breaks | ||
| * (including tables and paragraph styles using inline CSS). State is tracked in | ||
| * a StructuredHTMLState object that may be passed to subsequent visitors or | ||
| * "closed". | ||
| */ | ||
| public abstract class AbstractStructuredHTMLVisitor extends AbstractHTMLVisitor { | ||
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| protected final StructuredHTMLState state; | ||
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| protected AbstractStructuredHTMLVisitor(StructuredHTMLState state) { | ||
| super(state.getWriter(), ""); | ||
| this.state = state; | ||
| } | ||
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| @Override | ||
| protected void prepareForInlineOutput(boolean endTag) throws IOException { | ||
| if (!endTag) { | ||
| state.ensureOpen(); | ||
| } else if (suffixStack.size() == 2) { | ||
| state.closeHeadline(); | ||
| } | ||
| } | ||
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| public static void startHeadline(StructuredHTMLState state) throws IOException { | ||
| state.closeAll(); | ||
| state.openState = StructuredHTMLOpenState.Headline; | ||
| } | ||
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| @Override | ||
| public Visitor<IOException> visitHeadline(int depth) throws IOException { | ||
| if (suffixStack.size() == 1) { | ||
| startHeadline(state); | ||
| } | ||
| writer.write("<h" + (depth < 6 ? depth : 6) + ">"); | ||
| pushSuffix("</h" + (depth < 6 ? depth : 6) + ">"); | ||
| return this; | ||
| } | ||
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| public static void visitLineBreak(AbstractHTMLVisitor v, StructuredHTMLState state, ExtendedLineBreakKind kind, int indent) throws IOException { | ||
| if (kind == ExtendedLineBreakKind.TABLE_ROW_FIRST_CELL || kind == ExtendedLineBreakKind.TABLE_ROW_NEXT_CELL) { | ||
| if (kind == ExtendedLineBreakKind.TABLE_ROW_FIRST_CELL && state.openState == StructuredHTMLOpenState.TableCell) { | ||
| v.writer.write("</td></tr><tr>"); | ||
| state.colNumber = 1; | ||
| } else if (state.openState == StructuredHTMLOpenState.TableCell) { | ||
| v.writer.write("</td>"); | ||
| } else { | ||
| state.closeAll(); | ||
| v.writer.write("<table><tr>"); | ||
| state.openState = StructuredHTMLOpenState.TableCell; | ||
| state.colNumber = 1; | ||
| } | ||
| if (state.colNumber == 1 && kind == ExtendedLineBreakKind.TABLE_ROW_NEXT_CELL) { | ||
| System.out.println("WARNING: Table cell without table row start"); | ||
| state.colNumber++; // for roundtrip formats | ||
| } | ||
| v.writer.write("<td class=\"col" + state.colNumber + "\""); | ||
| state.colNumber++; | ||
| if (indent > 0) { | ||
| v.writer.write(" colspan=\"" + indent + "\""); | ||
| state.colNumber += indent - 1; | ||
| } else if (indent == ExtendedLineBreakKind.INDENT_CENTER) { | ||
| v.writer.write(" style=\"text-align: center;\""); | ||
| } else if (indent == ExtendedLineBreakKind.INDENT_RIGHT_JUSTIFIED) { | ||
| v.writer.write(" style=\"text-align: right;\""); | ||
| } | ||
| v.writer.write(">"); | ||
| } else { | ||
| state.closeAll(); | ||
| state.openState = StructuredHTMLOpenState.Para; | ||
| v.writer.write("<p class=\"para-" + Character.toLowerCase(kind.getCode()) + "\""); | ||
| if (indent > 0) { | ||
| v.writer.write(" style=\"text-indent: " + indent + "em;\""); | ||
| } else if (indent == ExtendedLineBreakKind.INDENT_CENTER) { | ||
| v.writer.write(" style=\"text-align: center;\""); | ||
| } else if (indent == ExtendedLineBreakKind.INDENT_RIGHT_JUSTIFIED) { | ||
| v.writer.write(" style=\"text-align: right;\""); | ||
| } | ||
| v.writer.write(">"); | ||
| } | ||
| } | ||
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| @Override | ||
| public void visitLineBreak(ExtendedLineBreakKind kind, int indent) throws IOException { | ||
| if (suffixStack.size() == 1 && kind != ExtendedLineBreakKind.NEWLINE) { | ||
| visitLineBreak(this, state, kind, indent); | ||
| } else { | ||
| prepareForInlineOutput(false); | ||
| if (!kind.isSameParagraph()) { | ||
| writer.write("<br><br>"); | ||
| } else { | ||
| writer.write("<br>"); | ||
| } | ||
| if (indent > 0) { | ||
| writer.write("<span class=\"indent\">"); | ||
| for (int i = 0; i < indent; i++) { | ||
| writer.write(" "); | ||
| } | ||
| writer.write("</span>"); | ||
| } | ||
| } | ||
| } | ||
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| public static class StructuredHTMLState { | ||
| private final Writer writer; | ||
| private StructuredHTMLOpenState openState = StructuredHTMLOpenState.None; | ||
| private int colNumber = 0; | ||
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| public StructuredHTMLState(Writer writer) { | ||
| this.writer = writer; | ||
| } | ||
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| public Writer getWriter() { | ||
| return writer; | ||
| } | ||
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| public void ensureOpen() throws IOException { | ||
| if (openState == StructuredHTMLOpenState.None) { | ||
| writer.write("<p>"); | ||
| openState = StructuredHTMLOpenState.Para; | ||
| } | ||
| } | ||
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| public void closeHeadline() { | ||
| if (openState == StructuredHTMLOpenState.Headline) { | ||
| openState = StructuredHTMLOpenState.None; | ||
| } | ||
| } | ||
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| public void closeAll() throws IOException { | ||
| switch (openState) { | ||
| case Para: | ||
| writer.write("</p>"); | ||
| break; | ||
| case TableCell: | ||
| writer.write("</td></tr></table>"); | ||
| break; | ||
| case None: | ||
| case Headline: | ||
| break; | ||
| } | ||
| openState = StructuredHTMLOpenState.None; | ||
| } | ||
| } | ||
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| private static enum StructuredHTMLOpenState { | ||
| None, TableCell, Para, Headline | ||
| } | ||
| } |
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