com.redhat.ceylon.common.tools.help.PlaintextMarkdownVisitor Maven / Gradle / Ivy
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* Copyright Red Hat Inc. and/or its affiliates and other contributors
* as indicated by the authors tag. All rights reserved.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License version 2.
*
* This particular file is subject to the "Classpath" exception as provided in the
* LICENSE file that accompanied this code.
*
* This program is distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
* PARTICULAR PURPOSE. See the GNU General Public License for more details.
* You should have received a copy of the GNU General Public License,
* along with this distribution; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA.
*/
package com.redhat.ceylon.common.tools.help;
import org.tautua.markdownpapers.ast.CharRef;
import org.tautua.markdownpapers.ast.Code;
import org.tautua.markdownpapers.ast.CodeSpan;
import org.tautua.markdownpapers.ast.CodeText;
import org.tautua.markdownpapers.ast.Document;
import org.tautua.markdownpapers.ast.Emphasis;
import org.tautua.markdownpapers.ast.Header;
import org.tautua.markdownpapers.ast.Image;
import org.tautua.markdownpapers.ast.InlineUrl;
import org.tautua.markdownpapers.ast.Item;
import org.tautua.markdownpapers.ast.Line;
import org.tautua.markdownpapers.ast.LineBreak;
import org.tautua.markdownpapers.ast.Link;
import org.tautua.markdownpapers.ast.List;
import org.tautua.markdownpapers.ast.Node;
import org.tautua.markdownpapers.ast.Paragraph;
import org.tautua.markdownpapers.ast.Quote;
import org.tautua.markdownpapers.ast.Resource;
import org.tautua.markdownpapers.ast.Ruler;
import org.tautua.markdownpapers.ast.Tag;
import org.tautua.markdownpapers.ast.Text;
import com.redhat.ceylon.common.tool.WordWrap;
public class PlaintextMarkdownVisitor extends AbstractMarkdownVisitor {
private WordWrap out;
private int headerLevel = -1;
private boolean inCode;
public PlaintextMarkdownVisitor(WordWrap out) {
this.out = out;
}
@Override
public void visit(Header node) {
final Node parent = node.jjtGetParent();
for (int ii = 0; ii < parent.jjtGetNumChildren(); ii++) {
if (parent.jjtGetChild(ii) == node) {
if (ii == 0) {
continue;
}
}
}
switch (node.getLevel()) {
case 1:
case 2:
out.setIndent(0);
break;
case 3:
out.setIndent(3);
break;
case 4:
out.setIndent(5);
break;
case 5:
out.setIndent(6);
break;
case 6:
default:
out.setIndent(7);
break;
}
if (!(node.jjtGetParent() instanceof Document && Markdown.getIndexInParent(node) == 0)) {
out.newline();
}
switch (node.getLevel()) {
case 1:
int col = out.getColumn();
this.headerLevel = node.getLevel();
node.childrenAccept(this);
this.headerLevel = -1;
int num = out.getColumn() - col;
out.newline();
for (int ii = 0; ii < num; ii++) {
out.append("=");
}
out.newline();
out.setIndent(8);
break;
case 2:
case 3:
case 4:
case 5:
case 6:
default:
this.headerLevel = node.getLevel();
node.childrenAccept(this);
this.headerLevel = -1;
out.newline();
out.setIndent(8);
break; }
out.newline();
}
@Override
public void visit(Item node) {
int rest = out.getIndentRestLines();
if (((List)node.jjtGetParent()).isOrdered()) {
for (int ii = 0; ii < node.jjtGetParent().jjtGetNumChildren(); ii++) {
if (node.jjtGetParent().jjtGetChild(ii) == node) {
out.append((ii+1)+". ");
out.setIndent(rest + 3);
break;
}
}
} else {
out.append("* ");
out.setIndent(rest + 2);
}
node.childrenAccept(this);
out.setIndent(rest);
out.newline().newline();
}
@Override
public void visit(Paragraph node) {
node.childrenAccept(this);
if (!(node.jjtGetParent() instanceof Item)) {
out.newline().newline();
}
}
@Override
public void visit(Quote node) {
out.setPrefix("> ");
node.childrenAccept(this);
out.setPrefix(null);
}
@Override
public void visit(CodeText node) {
out.append(node.getValue());
out.newline();
}
@Override
public void visit(Code node) {
this.inCode = true;
node.childrenAccept(this);
this.inCode = false;
}
@Override
public void visit(Ruler node) {
out.newline();
out.column(out.getWidth()/2-2);
out.append("* * *").newline().newline();
}
@Override
public void visit(Tag node) {
out.append("<").append(node.getName()).append(">");
node.childrenAccept(this);
out.append("");
}
@Override
public void visit(CharRef node) {
out.append(node.getValue());
}
@Override
public void visit(CodeSpan node) {
String text = node.getText();
if (uppercaseText()) {
text = text.toUpperCase();
}
out.append("'").append(text).append("'");
}
@Override
public void visit(Emphasis node) {
String text = node.getText();
if (uppercaseText()) {
text = text.toUpperCase();
}
switch (node.getType()) {
case ITALIC_AND_BOLD:
case BOLD:
text = text.toUpperCase();
break;
case ITALIC:
default:
break;
}
out.append(text);
}
@Override
public void visit(Image node) {
// TODO Issue a warning? Or should we try to copy the image into the
// target directory?
node.childrenAccept(this);
}
@Override
public void visit(Line node) {
node.childrenAccept(this);
if (!node.isEmpty() && !node.isEnding()) {
if (inCode
&& Markdown.getNext(node) != null) {
out.append("");
} else if (!inCode) {
out.append(" ");
}
}
if (node.isEmpty() && inCode) {
out.newline();
}
}
@Override
public void visit(LineBreak node) {
out.append(" ");
node.childrenAccept(this);
}
@Override
public void visit(Link node) {
Resource resource = node.getResource();
if (resource == null) {
Node doc = node.jjtGetParent();
while (!(doc instanceof Document)) {
doc = doc.jjtGetParent();
}
resource = ((Document)doc).findResource(node.getReference());
}
if (resource != null) {
out.append(node.getText()).append(" (").append(resource.getLocation()).append(")");
} else {
out.append(node.getText());
}
}
@Override
public void visit(InlineUrl node) {
out.append(node.getUrl());
}
@Override
public void visit(final Text node) {
if (node.isWhitespace()) {
if (headerLevel >= 1
&& node.jjtGetParent().jjtGetChild(0) == node) {
// filter whitespace at the start of headers
return;
}
}
String text = node.getValue();
if (uppercaseText()) {
text = text.toUpperCase();
}
out.append(text);
}
private boolean uppercaseText() {
return headerLevel == 1 || headerLevel == 2;
}
}
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