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/*
* Copyright 2000-2014 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.fileEditor.impl;
import com.intellij.openapi.fileEditor.FileEditorProvider;
import com.intellij.openapi.fileEditor.FileEditorState;
import com.intellij.openapi.fileEditor.ex.FileEditorProviderManager;
import com.intellij.openapi.project.Project;
import com.intellij.openapi.util.InvalidDataException;
import com.intellij.openapi.vfs.VirtualFile;
import com.intellij.openapi.vfs.VirtualFileManager;
import com.intellij.util.containers.HashMap;
import org.jdom.Element;
import org.jetbrains.annotations.NonNls;
import org.jetbrains.annotations.NotNull;
import java.util.List;
import java.util.Map;
final class HistoryEntry{
@NonNls static final String TAG = "entry";
private static final String FILE_ATTR = "file";
@NonNls private static final String PROVIDER_ELEMENT = "provider";
@NonNls private static final String EDITOR_TYPE_ID_ATTR = "editor-type-id";
@NonNls private static final String SELECTED_ATTR_VALUE = "selected";
@NonNls private static final String STATE_ELEMENT = "state";
public final VirtualFile myFile;
/**
* can be null when read from XML
*/
public FileEditorProvider mySelectedProvider;
private final HashMap<FileEditorProvider, FileEditorState> myProvider2State;
public HistoryEntry(@NotNull VirtualFile file, @NotNull FileEditorProvider[] providers, @NotNull FileEditorState[] states, @NotNull FileEditorProvider selectedProvider){
myFile = file;
myProvider2State = new HashMap<FileEditorProvider, FileEditorState>();
mySelectedProvider = selectedProvider;
for (int i = 0; i < providers.length; i++) {
putState(providers[i], states[i]);
}
}
public HistoryEntry(@NotNull Project project, @NotNull Element e) throws InvalidDataException {
myFile = getVirtualFile(e);
myProvider2State = new HashMap<FileEditorProvider, FileEditorState>();
List providers = e.getChildren(PROVIDER_ELEMENT);
for (final Object provider1 : providers) {
Element _e = (Element)provider1;
String typeId = _e.getAttributeValue(EDITOR_TYPE_ID_ATTR);
FileEditorProvider provider = FileEditorProviderManager.getInstance().getProvider(typeId);
if (provider == null) {
continue;
}
if (Boolean.valueOf(_e.getAttributeValue(SELECTED_ATTR_VALUE))) {
mySelectedProvider = provider;
}
Element stateElement = _e.getChild(STATE_ELEMENT);
if (stateElement == null) {
throw new InvalidDataException();
}
FileEditorState state = provider.readState(stateElement, project, myFile);
putState(provider, state);
}
}
public FileEditorState getState(@NotNull FileEditorProvider provider) {
return myProvider2State.get(provider);
}
public void putState(@NotNull FileEditorProvider provider, @NotNull FileEditorState state) {
myProvider2State.put(provider, state);
}
/**
* @return element that was added to the <code>element</code>.
* Returned element has tag {@link #TAG}. Never null.
*/
public Element writeExternal(Element element, Project project) {
Element e = new Element(TAG);
element.addContent(e);
e.setAttribute(FILE_ATTR, myFile.getUrl());
for (final Map.Entry<FileEditorProvider, FileEditorState> entry : myProvider2State.entrySet()) {
FileEditorProvider provider = entry.getKey();
Element providerElement = new Element(PROVIDER_ELEMENT);
if (provider.equals(mySelectedProvider)) {
providerElement.setAttribute(SELECTED_ATTR_VALUE, Boolean.TRUE.toString());
}
providerElement.setAttribute(EDITOR_TYPE_ID_ATTR, provider.getEditorTypeId());
Element stateElement = new Element(STATE_ELEMENT);
providerElement.addContent(stateElement);
provider.writeState(entry.getValue(), project, stateElement);
e.addContent(providerElement);
}
return e;
}
@NotNull
public static VirtualFile getVirtualFile(Element historyElement) throws InvalidDataException {
if (!historyElement.getName().equals(TAG)) {
throw new IllegalArgumentException("unexpected tag: " + historyElement);
}
String url = historyElement.getAttributeValue(FILE_ATTR);
VirtualFile file = VirtualFileManager.getInstance().findFileByUrl(url);
if (file == null){
throw new InvalidDataException("No file exists: " + url);
}
return file;
}
}
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