/*
* Copyright 2012 GitHub Inc.
*
* Licensed 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 com.github.mobile.ui.commit;
import android.content.res.Resources;
import android.text.TextUtils;
import android.widget.TextView;
import com.github.mobile.R.color;
import com.github.mobile.R.drawable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.eclipse.egit.github.core.CommitFile;
/**
* Styler for the file diffs introduced in a commit
*/
public class DiffStyler {
private final Map<String, List<CharSequence>> diffs = new HashMap<String, List<CharSequence>>();
private final int markerColor;
private final int defaultColor;
/**
* Create diff styler
*
* @param resources
*/
public DiffStyler(final Resources resources) {
markerColor = resources.getColor(color.diff_marker_text);
defaultColor = resources.getColor(color.text);
}
private int nextLine(final String patch, final int start, final int length) {
final int end = patch.indexOf('\n', start);
if (end != -1)
return end;
else
return length;
}
/**
* Style view for line
*
* @param line
* @param view
*/
public void updateColors(final CharSequence line, final TextView view) {
if (TextUtils.isEmpty(line)) {
view.setBackgroundResource(drawable.list_item_background);
view.setTextColor(defaultColor);
return;
}
switch (line.charAt(0)) {
case '@':
view.setBackgroundResource(drawable.diff_marker_background);
view.setTextColor(markerColor);
return;
case '+':
view.setBackgroundResource(drawable.diff_add_background);
view.setTextColor(defaultColor);
return;
case '-':
view.setBackgroundResource(drawable.diff_remove_background);
view.setTextColor(defaultColor);
return;
default:
view.setBackgroundResource(drawable.list_item_background);
view.setTextColor(defaultColor);
}
}
/**
* Set files to styler
*
* @param files
* @return this styler
*/
public DiffStyler setFiles(final Collection<CommitFile> files) {
diffs.clear();
if (files == null || files.isEmpty())
return this;
for (CommitFile file : files) {
String patch = file.getPatch();
if (TextUtils.isEmpty(patch))
continue;
int start = 0;
int length = patch.length();
int end = nextLine(patch, start, length);
List<CharSequence> lines = new ArrayList<CharSequence>();
while (start < length) {
lines.add(patch.substring(start, end));
start = end + 1;
end = nextLine(patch, start, length);
}
diffs.put(file.getFilename(), lines);
}
return this;
}
/**
* Get lines for file path
*
* @param file
* @return styled text
*/
public List<CharSequence> get(final String file) {
if (TextUtils.isEmpty(file))
return Collections.emptyList();
List<CharSequence> lines = diffs.get(file);
return lines != null ? lines : Collections.<CharSequence> emptyList();
}
}