Java tutorial
/* * 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.xdebugger.impl.ui; import com.intellij.ide.DataManager; import com.intellij.lang.Language; import com.intellij.openapi.actionSystem.AnAction; import com.intellij.openapi.actionSystem.AnActionEvent; import com.intellij.openapi.actionSystem.DataContext; import com.intellij.openapi.actionSystem.DefaultActionGroup; import com.intellij.openapi.editor.Document; import com.intellij.openapi.editor.Editor; import com.intellij.openapi.fileTypes.FileType; import com.intellij.openapi.fileTypes.LanguageFileType; import com.intellij.openapi.project.Project; import com.intellij.openapi.ui.popup.JBPopupFactory; import com.intellij.openapi.ui.popup.ListPopup; import com.intellij.openapi.util.IconLoader; import com.intellij.openapi.wm.IdeFocusManager; import com.intellij.reference.SoftReference; import com.intellij.ui.ClickListener; import com.intellij.xdebugger.XExpression; import com.intellij.xdebugger.XSourcePosition; import com.intellij.xdebugger.evaluation.EvaluationMode; import com.intellij.xdebugger.evaluation.XDebuggerEditorsProvider; import com.intellij.xdebugger.impl.XDebuggerHistoryManager; import com.intellij.xdebugger.impl.breakpoints.XExpressionImpl; import org.jetbrains.annotations.NonNls; import org.jetbrains.annotations.NotNull; import org.jetbrains.annotations.Nullable; import javax.swing.*; import javax.swing.border.EmptyBorder; import java.awt.*; import java.awt.event.MouseEvent; import java.lang.ref.WeakReference; import java.util.Collection; import java.util.Collections; import java.util.List; /** * @author nik */ public abstract class XDebuggerEditorBase { private final Project myProject; private final XDebuggerEditorsProvider myDebuggerEditorsProvider; @NotNull private final EvaluationMode myMode; @Nullable private final String myHistoryId; private final XSourcePosition mySourcePosition; private int myHistoryIndex; private final JLabel myChooseFactory = new JLabel(); private WeakReference<ListPopup> myPopup; protected XDebuggerEditorBase(final Project project, @NotNull XDebuggerEditorsProvider debuggerEditorsProvider, @NotNull EvaluationMode mode, @Nullable @NonNls String historyId, final @Nullable XSourcePosition sourcePosition) { myProject = project; myDebuggerEditorsProvider = debuggerEditorsProvider; myMode = mode; myHistoryId = historyId; mySourcePosition = sourcePosition; myChooseFactory.setToolTipText("Click to change the language"); myChooseFactory.setBorder(new EmptyBorder(0, 3, 0, 3)); new ClickListener() { @Override public boolean onClick(@NotNull MouseEvent e, int clickCount) { ListPopup oldPopup = SoftReference.dereference(myPopup); if (oldPopup != null && !oldPopup.isDisposed()) { oldPopup.cancel(); myPopup = null; return true; } ListPopup popup = createLanguagePopup(); popup.showUnderneathOf(myChooseFactory); myPopup = new WeakReference<ListPopup>(popup); return true; } }.installOn(myChooseFactory); } private ListPopup createLanguagePopup() { DefaultActionGroup actions = new DefaultActionGroup(); for (final Language language : getEditorsProvider().getSupportedLanguages(myProject, mySourcePosition)) { actions.add(new AnAction(language.getDisplayName(), null, language.getAssociatedFileType().getIcon()) { @Override public void actionPerformed(AnActionEvent e) { XExpression currentExpression = getExpression(); setExpression(new XExpressionImpl(currentExpression.getExpression(), language, currentExpression.getCustomInfo())); IdeFocusManager.getInstance(getProject()).requestFocus(getComponent(), true); } }); } DataContext dataContext = DataManager.getInstance().getDataContext(getComponent()); return JBPopupFactory.getInstance().createActionGroupPopup("Choose language", actions, dataContext, JBPopupFactory.ActionSelectionAid.SPEEDSEARCH, false); } protected JPanel addChooseFactoryLabel(JComponent component, boolean top) { JPanel panel = new JPanel(new BorderLayout()); panel.add(component, BorderLayout.CENTER); JPanel factoryPanel = new JPanel(new BorderLayout()); factoryPanel.add(myChooseFactory, top ? BorderLayout.NORTH : BorderLayout.CENTER); panel.add(factoryPanel, BorderLayout.WEST); return panel; } @NotNull public EvaluationMode getMode() { return myMode; } @Nullable public abstract Editor getEditor(); public abstract JComponent getComponent(); protected abstract void doSetText(XExpression text); public void setExpression(@Nullable XExpression text) { if (text == null) { text = getMode() == EvaluationMode.EXPRESSION ? XExpressionImpl.EMPTY_EXPRESSION : XExpressionImpl.EMPTY_CODE_FRAGMENT; } saveTextInHistory(text); Language language = text.getLanguage(); if (language == null) { if (mySourcePosition != null) { language = getFileTypeLanguage(mySourcePosition.getFile().getFileType()); } if (language == null) { language = getFileTypeLanguage(getEditorsProvider().getFileType()); } } text = new XExpressionImpl(text.getExpression(), language, text.getCustomInfo(), getMode()); Collection<Language> languages = getEditorsProvider().getSupportedLanguages(myProject, mySourcePosition); boolean many = languages.size() > 1; if (language != null) { myChooseFactory.setVisible(many); } myChooseFactory.setVisible(myChooseFactory.isVisible() || many); //myChooseFactory.setEnabled(many && languages.contains(language)); if (language != null && language.getAssociatedFileType() != null) { Icon icon = language.getAssociatedFileType().getIcon(); myChooseFactory.setIcon(icon); myChooseFactory.setDisabledIcon(IconLoader.getDisabledIcon(icon)); } doSetText(text); } @Nullable public static Language getFileTypeLanguage(@Nullable FileType fileType) { if (fileType instanceof LanguageFileType) { return ((LanguageFileType) fileType).getLanguage(); } return null; } public abstract XExpression getExpression(); @Nullable public abstract JComponent getPreferredFocusedComponent(); public abstract void selectAll(); protected void onHistoryChanged() { } protected List<XExpression> getRecentExpressions() { if (myHistoryId != null) { return XDebuggerHistoryManager.getInstance(myProject).getRecentExpressions(myHistoryId); } return Collections.emptyList(); } public void saveTextInHistory() { saveTextInHistory(getExpression()); } private void saveTextInHistory(final XExpression text) { if (myHistoryId != null) { boolean update = XDebuggerHistoryManager.getInstance(myProject).addRecentExpression(myHistoryId, text); myHistoryIndex = 0; if (update) { onHistoryChanged(); } } } public XDebuggerEditorsProvider getEditorsProvider() { return myDebuggerEditorsProvider; } public Project getProject() { return myProject; } protected Document createDocument(final XExpression text) { return getEditorsProvider().createDocument(getProject(), text, mySourcePosition, myMode); } public boolean canGoBackward() { return myHistoryIndex < getRecentExpressions().size() - 1; } public boolean canGoForward() { return myHistoryIndex > 0; } public void goBackward() { final List<XExpression> expressions = getRecentExpressions(); if (myHistoryIndex < expressions.size() - 1) { myHistoryIndex++; doSetText(expressions.get(myHistoryIndex)); } } public void goForward() { final List<XExpression> expressions = getRecentExpressions(); if (myHistoryIndex > 0) { myHistoryIndex--; doSetText(expressions.get(myHistoryIndex)); } } }