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package processing.mode.java;

import com.google.classpath.ClassPath;

import org.eclipse.jdt.core.compiler.IProblem;

import org.eclipse.jdt.core.dom.ASTNode;

import org.eclipse.jdt.core.dom.CompilationUnit;

import java.net.URLClassLoader;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collections;

import java.util.List;

import java.util.Map;

import processing.app.Problem;

import processing.app.Sketch;

import processing.core.PApplet;

import processing.mode.java.preproc.ImportStatement;

import processing.mode.java.preproc.TextTransform.OffsetMapper;

public class PreprocSketch {

public final Sketch sketch;

public final CompilationUnit compilationUnit;

public final String[] classPathArray;

public final ClassPath classPath;

public final URLClassLoader classLoader;

public final String[] searchClassPathArray;

public final int[] tabStartOffsets;

public final String scrubbedPdeCode;

public final String pdeCode;

public final String javaCode;

public final OffsetMapper offsetMapper;

public final boolean hasSyntaxErrors;

public final boolean hasCompilationErrors;

public final List<ImportStatement> programImports;

public final List<ImportStatement> coreAndDefaultImports;

public final List<ImportStatement> codeFolderImports;

public final List<Problem> otherProblems;

public final List<IProblem> iproblems;

public final Map<String, Integer> javaFileMapping;

/// JAVA -> SKETCH -----------------------------------------------------------

public boolean inRange(SketchInterval interval) {

return interval != SketchInterval.BEFORE_START &&

interval.stopPdeOffset < pdeCode.length();

}

public String getPdeCode(SketchInterval si) {

if (si == SketchInterval.BEFORE_START) return "";

int stop = Math.min(si.stopPdeOffset, pdeCode.length());

int start = Math.min(si.startPdeOffset, stop);

return pdeCode.substring(start, stop);

}

public SketchInterval mapJavaToSketch(ASTNode node) {

return mapJavaToSketch(node.getStartPosition(),

node.getStartPosition() + node.getLength());

}

public boolean isJavaTab(String fileName) {

return javaFileMapping.containsKey(fileName);

}

public int getJavaTabIndex(String fileName) {

return javaFileMapping.get(fileName);

}

public SketchInterval mapJavaToSketch(IProblem iproblem) {

String originalFile = new String(iproblem.getOriginatingFileName());

boolean isJavaTab = javaFileMapping.containsKey(originalFile);

// If is a ".java" tab, do not need to map into combined sketch source.

if (isJavaTab) {

return new SketchInterval(

javaFileMapping.get(originalFile),

iproblem.getSourceStart(),

iproblem.getSourceEnd() + 1,

iproblem.getSourceStart(), // Is outside main sketch code

iproblem.getSourceEnd() + 1 // Is outside main sketch code

);

} else {

return mapJavaToSketch(

iproblem.getSourceStart(),

iproblem.getSourceEnd() + 1 // make it exclusive

);

}

public SketchInterval mapJavaToSketch(int startJavaOffset, int stopJavaOffset) {

int length = stopJavaOffset - startJavaOffset;

int startPdeOffset = javaOffsetToPdeOffset(startJavaOffset);

int stopPdeOffset;

if (length == 0) {

stopPdeOffset = startPdeOffset;

} else {

stopPdeOffset = javaOffsetToPdeOffset(stopJavaOffset-1);

if (stopPdeOffset >= 0 && (stopPdeOffset > startPdeOffset || length == 1)) {

stopPdeOffset += 1;

}

if (startPdeOffset < 0 || stopPdeOffset < 0) {

return SketchInterval.BEFORE_START;

}

int tabIndex = pdeOffsetToTabIndex(startPdeOffset);

if (startPdeOffset >= pdeCode.length()) {

startPdeOffset = pdeCode.length() - 1;

stopPdeOffset = startPdeOffset + 1;

}

return new SketchInterval(tabIndex,

pdeOffsetToTabOffset(tabIndex, startPdeOffset),

pdeOffsetToTabOffset(tabIndex, stopPdeOffset),

startPdeOffset, stopPdeOffset);

}

private int javaOffsetToPdeOffset(int javaOffset) {

return offsetMapper.getInputOffset(javaOffset);

}

public int pdeOffsetToTabIndex(int pdeOffset) {

pdeOffset = Math.max(0, pdeOffset);

int tab = Arrays.binarySearch(tabStartOffsets, pdeOffset);

if (tab < 0) {

tab = -(tab + 1) - 1;

}

return tab;

}

public int pdeOffsetToTabOffset(int tabIndex, int pdeOffset) {

int tabStartOffset = tabStartOffsets[clipTabIndex(tabIndex)];

return pdeOffset - tabStartOffset;

}

/// SKETCH -> JAVA -----------------------------------------------------------

public int tabOffsetToJavaOffset(int tabIndex, int tabOffset) {

int tabStartOffset = tabStartOffsets[clipTabIndex(tabIndex)];

int pdeOffset = tabStartOffset + tabOffset;

return offsetMapper.getOutputOffset(pdeOffset);

}

/// LINE NUMBERS -------------------------------------------------------------

public int tabOffsetToJavaLine(int tabIndex, int tabOffset) {

int javaOffset = tabOffsetToJavaOffset(tabIndex, tabOffset);

return offsetToLine(javaCode, javaOffset);

}

public int tabOffsetToTabLine(int tabIndex, int tabOffset) {

int tabStartOffset = tabStartOffsets[clipTabIndex(tabIndex)];

return offsetToLine(pdeCode, tabStartOffset, tabStartOffset + tabOffset);

}

// TODO: optimize

private static int offsetToLine(String text, int offset) {

return offsetToLine(text, 0, offset);

}

// TODO: optimize

private static int offsetToLine(String text, int start, int offset) {

int line = 0;

while (offset >= start) {

offset = text.lastIndexOf('\n', offset-1);

line++;

}

return line - 1;

}

/// Util ---------------------------------------------------------------------

private int clipTabIndex(int tabIndex) {

return PApplet.constrain(tabIndex, 0, tabStartOffsets.length - 1);

}

/// BUILDER BUSINESS /////////////////////////////////////////////////////////

/**

* There is a lot of fields and having constructor with this many parameters

* is just not practical. Fill stuff into builder and then simply build it.

* Builder also guards against calling methods in the middle of building process.

public static class Builder {

public Sketch sketch;

public CompilationUnit compilationUnit;

public String[] classPathArray;

public ClassPath classPath;

public URLClassLoader classLoader;

public String[] searchClassPathArray;

public int[] tabStartOffsets = new int[0];

public String scrubbedPdeCode;

public String pdeCode;

public String javaCode;

public OffsetMapper offsetMapper;

public boolean hasSyntaxErrors;

public boolean hasCompilationErrors;

public final List<ImportStatement> programImports = new ArrayList<>();

public final List<ImportStatement> coreAndDefaultImports = new ArrayList<>();

public final List<ImportStatement> codeFolderImports = new ArrayList<>();

public final List<Problem> otherProblems = new ArrayList<>();

public List<IProblem> iproblems;

public Map<String, Integer> javaFileMapping;

public PreprocSketch build() {

return new PreprocSketch(this);

}

public static PreprocSketch empty() {

return new Builder().build();

}

private PreprocSketch(Builder b) {

sketch = b.sketch;

compilationUnit = b.compilationUnit;

classPathArray = b.classPathArray;

classPath = b.classPath;

classLoader = b.classLoader;

searchClassPathArray = b.searchClassPathArray;

tabStartOffsets = b.tabStartOffsets;

scrubbedPdeCode = b.scrubbedPdeCode;

pdeCode = b.pdeCode;

javaCode = b.javaCode;

offsetMapper = b.offsetMapper != null ? b.offsetMapper : OffsetMapper.EMPTY_MAPPER;

hasSyntaxErrors = b.hasSyntaxErrors;

hasCompilationErrors = b.hasCompilationErrors;

otherProblems = b.otherProblems;

javaFileMapping = b.javaFileMapping;

iproblems = b.iproblems;

programImports = Collections.unmodifiableList(b.programImports);

coreAndDefaultImports = Collections.unmodifiableList(b.coreAndDefaultImports);

codeFolderImports = Collections.unmodifiableList(b.codeFolderImports);

}