/**
* Copyright (C) 2005 - 2012 Eric Van Dewoestine
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY 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 program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.eclim.plugin.core.command.search;
import java.io.BufferedReader;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.eclim.annotation.Command;
import org.eclim.command.CommandLine;
import org.eclim.command.Options;
import org.eclim.plugin.core.command.AbstractCommand;
import org.eclim.plugin.core.util.ProjectUtils;
import org.eclim.util.IOUtils;
import org.eclim.util.file.FileUtils;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IResourceProxy;
import org.eclipse.core.resources.IResourceProxyVisitor;
import org.eclipse.core.resources.ResourcesPlugin;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IPath;
import com.wcohen.ss.Levenstein;
import com.wcohen.ss.api.StringDistance;
/**
* Given a file pattern, finds all files that match that pattern.
*
* @author Eric Van Dewoestine
*/
@Command(
name = "locate_file",
options =
"REQUIRED p pattern ARG," +
"REQUIRED s scope ARG," +
"OPTIONAL n project ARG," +
"OPTIONAL f file ARG," +
"OPTIONAL i case_insensitive NOARG"
)
public class LocateFileCommand
extends AbstractCommand
{
public static final String SCOPE_PROJECT = "project";
public static final String SCOPE_WORKSPACE = "workspace";
public static final String SCOPE_LIST = "list";
@Override
public Object execute(CommandLine commandLine)
throws Exception
{
String pattern = commandLine.getValue(Options.PATTERN_OPTION);
String scope = commandLine.getValue(Options.SCOPE_OPTION);
String projectName = commandLine.getValue(Options.NAME_OPTION);
List<Result> results = null;
if (SCOPE_LIST.equals(scope)){
results = executeLocateFromFileList(commandLine, pattern, scope);
}else{
results = executeLocateFromEclipse(commandLine, pattern, scope);
}
FilePathComparator comparator =
new FilePathComparator(pattern, projectName);
Collections.sort(results, comparator);
return results;
}
@Override
public void cleanup(CommandLine commandLine)
{
// no-op
}
private List<Result> executeLocateFromFileList(
CommandLine commandLine, String pattern, String scope)
throws Exception
{
ArrayList<Result> results = new ArrayList<Result>();
String fileName = commandLine.getValue(Options.FILE_OPTION);
BufferedReader reader = null;
try{
reader = new BufferedReader(new FileReader(fileName));
int flags = 0;
if (commandLine.hasOption(Options.CASE_INSENSITIVE_OPTION)){
flags = Pattern.CASE_INSENSITIVE;
}
Matcher matcher = Pattern.compile(pattern, flags).matcher("");
String line = null;
while ((line = reader.readLine()) != null){
if (matcher.reset(line).find()){
results.add(new Result(FileUtils.getBaseName(line), line, null, null));
}
}
}finally{
IOUtils.closeQuietly(reader);
}
return results;
}
private List<Result> executeLocateFromEclipse(
CommandLine commandLine, String pattern, String scope)
throws Exception
{
ArrayList<IProject> projects = new ArrayList<IProject>();
String projectName = commandLine.getValue(Options.NAME_OPTION);
if (projectName != null){
IProject project = ProjectUtils.getProject(projectName, true);
projects.add(project);
IProject[] depends = project.getReferencedProjects();
for (IProject p : depends){
if(!p.isOpen()){
p.open(null);
}
projects.add(p);
}
}
if (SCOPE_WORKSPACE.equals(scope)){
IProject[] all = ResourcesPlugin.getWorkspace().getRoot().getProjects();
for (IProject p : all){
if(p.isOpen() && !projects.contains(p)){
projects.add(p);
}
}
}
FileMatcher matcher = new FileMatcher(
pattern, commandLine.hasOption(Options.CASE_INSENSITIVE_OPTION));
for (IProject resource : projects){
resource.accept(matcher, 0);
}
return matcher.getResults();
}
public static class Result
{
public String name;
public String path;
public String project;
public String projectPath;
/**
* Constructs a new instance.
*
* @param name The name of the file.
* @param path The absolute path of the file.
* @param project The name of the project the file is in.
* @param projectPath The path of the file in the project.
*/
public Result(
String name,
String path,
String project,
String projectPath)
{
this.name = name;
this.path = path;
this.project = project;
this.projectPath = projectPath;
}
}
private static class FileMatcher
implements IResourceProxyVisitor
{
private static final Pattern FIND_BASE = Pattern.compile("^.*/([^\\]].*)");
private static final ArrayList<String> IGNORE_DIRS =
new ArrayList<String>();
static {
IGNORE_DIRS.add("CVS");
IGNORE_DIRS.add(".bzr");
IGNORE_DIRS.add(".git");
IGNORE_DIRS.add(".hg");
IGNORE_DIRS.add(".svn");
}
private static final ArrayList<String> IGNORE_EXTS =
new ArrayList<String>();
static {
IGNORE_EXTS.add("class");
IGNORE_EXTS.add("gif");
IGNORE_EXTS.add("jpeg");
IGNORE_EXTS.add("jpg");
IGNORE_EXTS.add("png");
IGNORE_EXTS.add("pyc");
IGNORE_EXTS.add("swp");
}
private Matcher matcher;
private boolean includesPath;
private Matcher baseMatcher;
private ArrayList<Result> results = new ArrayList<Result>();
private ArrayList<String> seen = new ArrayList<String>();
/**
* Constructs a new instance.
*
* @param pattern The pattern for this instance.
*/
public FileMatcher (String pattern, boolean ignoreCase)
{
int flags = 0;
if (ignoreCase){
flags = Pattern.CASE_INSENSITIVE;
}
this.matcher = Pattern.compile(pattern, flags).matcher("");
Matcher baseMatcher = FIND_BASE.matcher(pattern);
if (baseMatcher.find()){
String base = baseMatcher.group(1);
this.baseMatcher = Pattern.compile(base).matcher("");
this.includesPath = true;
}
}
@Override
public boolean visit(IResourceProxy proxy)
throws CoreException
{
if (results.size() >= 100){
return false;
}
int type = proxy.getType();
String name = proxy.getName();
if (type == IResource.PROJECT){
return true;
}else if (type == IResource.FOLDER && IGNORE_DIRS.contains(name)){
return false;
}else if (type == IResource.FOLDER){
return true;
}else if (type == IResource.FILE){
String ext = FileUtils.getExtension(name).toLowerCase();
if (IGNORE_EXTS.contains(ext)){
return false;
}
}
IResource resource = null;
if (includesPath){
if (!baseMatcher.reset(name).matches()){
return true;
}
resource = proxy.requestResource();
name = resource.getFullPath().toOSString().replace('\\', '/');
}
if (matcher.reset(name).matches()){
if (resource == null){
resource = proxy.requestResource();
}
IPath raw = resource.getLocation();
if (raw != null){
String rel = resource.getFullPath().toOSString().replace('\\', '/');
String path = raw.toOSString().replace('\\', '/');
Result entry = new Result(
FileUtils.getBaseName(rel),
path, resource.getProject().getName(), rel);
if (!seen.contains(path)){
results.add(entry);
seen.add(path);
}
}
}
return true;
}
public List<Result> getResults()
{
return results;
}
}
private static class FilePathComparator
implements Comparator<Result>
{
private StringDistance distance;
private String pattern;
private String projectName;
private Map<String, Double> scores = new HashMap<String, Double>();
/**
* Constructs a new instance.
*
* @param pattern The pattern for this instance.
* @param projectName The possibly null current project name.
*/
public FilePathComparator(String pattern, String projectName)
{
this.distance = new Levenstein();
this.pattern = pattern;
this.pattern = this.pattern.replaceAll("\\.\\*\\??", "");
this.projectName = projectName;
}
@Override
public int compare(Result o1, Result o2)
{
double score1 = score(o1);
double score2 = score(o2);
return (int)Math.round(score1 - score2);
}
public double score(Result result)
{
String path = result.projectPath != null ? result.projectPath : result.path;
if (this.scores.containsKey(path)){
return this.scores.get(path);
}
double score = 0 - this.distance.score(this.pattern, path);
// weight files in the current project more favorably
if (projectName != null && result.project != null){
if (result.project.equals(projectName)){
score -= score * .1;
}
}
this.scores.put(path, score);
return score;
}
@Override
public boolean equals(Object obj)
{
return super.equals(obj);
}
}
}