| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| * |
| */ |
| |
| package org.apache.royale.compiler.internal.codegen; |
| |
| import java.io.FilterWriter; |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.apache.royale.compiler.codegen.IEmitter; |
| import org.apache.royale.compiler.codegen.IEmitterTokens; |
| import org.apache.royale.compiler.internal.codegen.as.ASEmitterTokens; |
| import org.apache.royale.compiler.problems.ICompilerProblem; |
| import org.apache.royale.compiler.tree.as.IASNode; |
| import org.apache.royale.compiler.visitor.as.IASBlockWalker; |
| |
| /** |
| * The base implementation for an ActionScript emitter. |
| * |
| * @author Michael Schmalle |
| */ |
| public class Emitter implements IEmitter |
| { |
| private final FilterWriter out; |
| |
| private boolean bufferWrite; |
| |
| protected boolean isBufferWrite() |
| { |
| return bufferWrite; |
| } |
| |
| protected void setBufferWrite(boolean value) |
| { |
| bufferWrite = value; |
| } |
| |
| private StringBuilder builder; |
| |
| protected StringBuilder getBuilder() |
| { |
| return builder; |
| } |
| |
| protected void flushBuilder() |
| { |
| setBufferWrite(false); |
| write(builder.toString()); |
| builder.setLength(0); |
| } |
| |
| protected List<ICompilerProblem> problems; |
| |
| // (mschmalle) think about how this should be implemented, we can add our |
| // own problems to this, they don't just have to be parse problems |
| public List<ICompilerProblem> getProblems() |
| { |
| return problems; |
| } |
| |
| // private IDocEmitter docEmitter; |
| // |
| // @Override |
| // public IDocEmitter getDocEmitter() |
| // { |
| // return docEmitter; |
| // } |
| // |
| // @Override |
| // public void setDocEmitter(IDocEmitter value) |
| // { |
| // docEmitter = value; |
| // } |
| |
| private int currentIndent = 0; |
| |
| protected int getCurrentIndent() |
| { |
| return currentIndent; |
| } |
| |
| private IASBlockWalker walker; |
| |
| public IASBlockWalker getWalker() |
| { |
| return walker; |
| } |
| |
| public void setWalker(IASBlockWalker value) |
| { |
| walker = value; |
| } |
| |
| private int currentLine = 0; |
| |
| protected int getCurrentLine() |
| { |
| return currentLine; |
| } |
| |
| private int currentColumn = 0; |
| |
| protected int getCurrentColumn() |
| { |
| return currentColumn; |
| } |
| |
| public Emitter(FilterWriter out) |
| { |
| this.out = out; |
| builder = new StringBuilder(); |
| problems = new ArrayList<ICompilerProblem>(); |
| } |
| |
| @Override |
| public void write(IEmitterTokens value) |
| { |
| write(value.getToken()); |
| } |
| |
| @Override |
| public void write(String value) |
| { |
| try |
| { |
| if (!bufferWrite) |
| { |
| int newLineCount = value.length() - value.replace("\n", "").length(); |
| currentLine += newLineCount; |
| if (newLineCount > 0) |
| { |
| currentColumn = value.length() - value.lastIndexOf("\n") - 1; |
| } |
| else |
| { |
| currentColumn += value.length(); |
| } |
| out.write(value); |
| } |
| else |
| { |
| builder.append(value); |
| } |
| } |
| catch (IOException e) |
| { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| protected String getIndent(int numIndent) |
| { |
| final StringBuilder sb = new StringBuilder(); |
| for (int i = 0; i < numIndent; i++) |
| sb.append(ASEmitterTokens.INDENT.getToken()); |
| return sb.toString(); |
| } |
| |
| @Override |
| public void indentPush() |
| { |
| currentIndent++; |
| } |
| |
| @Override |
| public void indentPop() |
| { |
| if (currentIndent > 0) |
| currentIndent--; |
| } |
| |
| @Override |
| public void writeNewline() |
| { |
| write(ASEmitterTokens.NEW_LINE); |
| write(getIndent(currentIndent)); |
| } |
| |
| @Override |
| public void writeNewline(IEmitterTokens value) |
| { |
| writeNewline(value.getToken()); |
| } |
| |
| @Override |
| public void writeNewline(String value) |
| { |
| write(value); |
| writeNewline(); |
| } |
| |
| @Override |
| public void writeNewline(IEmitterTokens value, boolean pushIndent) |
| { |
| writeNewline(value.getToken(), pushIndent); |
| } |
| |
| @Override |
| public void writeNewline(String value, boolean pushIndent) |
| { |
| if (pushIndent) |
| indentPush(); |
| else |
| indentPop(); |
| write(value); |
| writeNewline(); |
| } |
| |
| public void writeSymbol(String value) |
| { |
| write(value); |
| } |
| |
| @Override |
| public void writeToken(IEmitterTokens value) |
| { |
| writeToken(value.getToken()); |
| } |
| |
| @Override |
| public void writeToken(String value) |
| { |
| write(value); |
| write(ASEmitterTokens.SPACE); |
| } |
| |
| /** |
| * Takes the node argument and created a String representation if it using |
| * the buffer temporarily. |
| * <p> |
| * Note; This method is still beta, it need more logic if an emitter is |
| * actually using the buffer! |
| * |
| * @param node The node walk and create a String for. |
| * @return The node's output. |
| */ |
| public String stringifyNode(IASNode node) |
| { |
| setBufferWrite(true); |
| getWalker().walk(node); |
| String result = getBuilder().toString(); |
| getBuilder().setLength(0); |
| setBufferWrite(false); |
| return result; |
| } |
| } |