/*
* Copyright 2000-2009 JetBrains s.r.o.
*
* 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.intellij.openapi.diff.impl.settings;
import com.intellij.diff.DiffContentFactory;
import com.intellij.diff.contents.DiffContent;
import com.intellij.openapi.extensions.ExtensionPointName;
import com.intellij.openapi.extensions.Extensions;
import com.intellij.openapi.fileTypes.FileType;
import com.intellij.openapi.fileTypes.StdFileTypes;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
/**
* @author oleg
* Implement this interface to enable custom diff preview in Colors & Fonts Settings page
*/
public abstract class DiffPreviewProvider {
public static final ExtensionPointName<DiffPreviewProvider> EP_NAME = ExtensionPointName.create("com.intellij.diffPreviewProvider");
@NotNull
public abstract DiffContent[] createContents();
@NotNull
public static DiffContent[] getContents() {
// Assuming that standalone IDE should provide one provider
final DiffPreviewProvider[] providers = Extensions.getExtensions(EP_NAME);
if (providers.length != 0) {
return providers[0].createContents();
}
return createContent(LEFT_TEXT, CENTER_TEXT, RIGHT_TEXT, StdFileTypes.JAVA);
}
@NotNull
public static DiffContent[] createContent(@NotNull String left,
@NotNull String center,
@NotNull String right,
@NotNull FileType fileType) {
return new DiffContent[]{
createContent(left, fileType),
createContent(center, fileType),
createContent(right, fileType)};
}
@NotNull
private static DiffContent createContent(@NotNull String text, @NotNull FileType fileType) {
return DiffContentFactory.getInstance().create(text, fileType);
}
@NonNls private static final String LEFT_TEXT = "class MyClass {\n" +
" int value;\n" +
"\n" +
" void leftOnly() {}\n" +
"\n" +
" void foo() {\n" +
" // Left changes\n" +
" }\n" +
"\n" +
" void bar() {\n" +
"\n" +
" }\n" +
"}";
@NonNls private static final String CENTER_TEXT = "class MyClass {\n" +
" int value;\n" +
"\n" +
" void foo() {\n" +
" }\n" +
"\n" +
" void removedFromLeft() {}\n" +
"\n" +
" void bar() {\n" +
"\n" +
" }\n" +
"}";
@NonNls private static final String RIGHT_TEXT = "class MyClass {\n" +
" long value;\n" +
"\n" +
" void foo() {\n" +
" // Right changes\n" +
" }\n" +
"\n" +
" void removedFromLeft() {}\n" +
"\n" +
" void bar() {\n" +
" }\n" +
"\n" +
"}";
}