| /******************************************************************************* |
| * Copyright (c) 2010, 2015 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| ******************************************************************************/ |
| |
| package org.eclipse.e4.ui.bindings.internal; |
| |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.ListIterator; |
| import javax.inject.Inject; |
| import org.eclipse.core.commands.ParameterizedCommand; |
| import org.eclipse.core.commands.contexts.Context; |
| import org.eclipse.e4.core.contexts.IEclipseContext; |
| import org.eclipse.jface.bindings.Binding; |
| import org.eclipse.jface.bindings.TriggerSequence; |
| |
| /** |
| * manage tables of bindings that can be used to look up commands from keys. |
| */ |
| public class BindingTableManager { |
| private static final String BINDING_TABLE_PREFIX = "bindingTable:"; //$NON-NLS-1$ |
| |
| @Inject |
| private IEclipseContext eclipseContext; |
| |
| private ContextSet definedTables = ContextSet.EMPTY; |
| |
| private String[] activeSchemeIds; |
| |
| public void addTable(BindingTable table) { |
| String contextId = getTableId(table.getId()); |
| if (eclipseContext.containsKey(contextId)) { |
| return; // it's already there |
| // throw new IllegalArgumentException("Already contains table " + contextId); //$NON-NLS-1$ |
| } |
| eclipseContext.set(contextId, table); |
| final List<Context> contexts = definedTables.getContexts(); |
| if (!contexts.contains(table.getTableId())) { |
| // this is only valid because I'm throwing away the old definedTables contextSet |
| contexts.add(table.getTableId()); |
| definedTables = createContextSet(contexts); |
| } |
| } |
| |
| private String getTableId(String id) { |
| return BINDING_TABLE_PREFIX + id; |
| } |
| |
| public void removeTable(BindingTable table) { |
| String contextId = getTableId(table.getId()); |
| if (!eclipseContext.containsKey(contextId)) { |
| throw new IllegalArgumentException("Does not contains table " + contextId); //$NON-NLS-1$ |
| } |
| eclipseContext.remove(contextId); |
| final List<Context> contexts = definedTables.getContexts(); |
| if (contexts.contains(table.getTableId())) { |
| // this is only valid because I'm throwing away the old definedTables contextSet |
| contexts.remove(table.getTableId()); |
| definedTables = createContextSet(contexts); |
| } |
| } |
| |
| public BindingTable getTable(String id) { |
| return (BindingTable) eclipseContext.get(getTableId(id)); |
| } |
| |
| // we're just going through each binding table, and returning a |
| // flat list of bindings here |
| public Collection<Binding> getActiveBindings() { |
| ArrayList<Binding> bindings = new ArrayList<>(); |
| for (Context ctx : definedTables.getContexts()) { |
| BindingTable table = getTable(ctx.getId()); |
| if (table != null) { |
| bindings.addAll(table.getBindings()); |
| } |
| } |
| return bindings; |
| } |
| |
| public ContextSet createContextSet(Collection<Context> contexts) { |
| return new ContextSet(contexts); |
| } |
| |
| public Collection<Binding> getConflictsFor(ContextSet contextSet, |
| TriggerSequence triggerSequence) { |
| Collection<Binding> matches = new ArrayList<>(); |
| for (Context ctx : contextSet.getContexts()) { |
| BindingTable table = getTable(ctx.getId()); |
| if (table != null) { |
| final Collection<Binding> matchesFor = table.getConflictsFor(triggerSequence); |
| if (matchesFor != null) { |
| matches.addAll(matchesFor); |
| } |
| } |
| } |
| return matches.isEmpty() ? null : matches; |
| } |
| |
| public Collection<Binding> getAllConflicts() { |
| Collection<Binding> conflictsList = new ArrayList<>(); |
| for (Context ctx : definedTables.getContexts()) { |
| BindingTable table = getTable(ctx.getId()); |
| if (table != null) { |
| Collection<Binding> conflictsInTable = table.getConflicts(); |
| if (conflictsInTable != null) { |
| conflictsList.addAll(conflictsInTable); |
| } |
| } |
| } |
| return conflictsList; |
| } |
| |
| public Binding getPerfectMatch(ContextSet contextSet, TriggerSequence triggerSequence) { |
| Binding result = null; |
| Binding currentResult = null; |
| List<Context> contexts = contextSet.getContexts(); |
| ListIterator<Context> it = contexts.listIterator(contexts.size()); |
| while (it.hasPrevious()) { |
| Context c = it.previous(); |
| BindingTable table = getTable(c.getId()); |
| if (table != null) { |
| currentResult = table.getPerfectMatch(triggerSequence); |
| } |
| if (currentResult != null) { |
| if (isMostActiveScheme(currentResult)) { |
| return currentResult; |
| } |
| if (result == null) { |
| result = currentResult; |
| } else { |
| int rc = compareSchemes(result.getSchemeId(), currentResult.getSchemeId()); |
| if (rc > 0) { |
| result = currentResult; |
| } |
| } |
| } |
| } |
| return result; |
| } |
| |
| /** |
| * @param currentResult |
| * @return |
| */ |
| private boolean isMostActiveScheme(Binding currentResult) { |
| if (activeSchemeIds == null || activeSchemeIds.length < 2) { |
| return true; |
| } |
| final String mostActive = activeSchemeIds[0]; |
| return mostActive == null ? false : mostActive.equals(currentResult.getSchemeId()); |
| } |
| |
| public Binding getBestSequenceFor(ContextSet contextSet, |
| ParameterizedCommand parameterizedCommand) { |
| ArrayList<Binding> bindings = (ArrayList<Binding>) getSequencesFor(contextSet, |
| parameterizedCommand); |
| if (bindings.isEmpty()) { |
| return null; |
| } |
| return bindings.get(0); |
| } |
| |
| public Collection<Binding> getSequencesFor(ContextSet contextSet, |
| ParameterizedCommand parameterizedCommand) { |
| ArrayList<Binding> bindings = new ArrayList<>(); |
| List<Context> contexts = contextSet.getContexts(); |
| ListIterator<Context> it = contexts.listIterator(contexts.size()); |
| while (it.hasPrevious()) { |
| Context c = it.previous(); |
| BindingTable table = getTable(c.getId()); |
| if (table != null) { |
| Collection<Binding> sequences = table.getSequencesFor(parameterizedCommand); |
| if (sequences != null) { |
| bindings.addAll(sequences); |
| } |
| } |
| } |
| Collections.sort(bindings, BindingTable.BEST_SEQUENCE); |
| return bindings; |
| } |
| |
| public Collection<Binding> getBindingsFor(ContextSet contextSet, ParameterizedCommand cmd) { |
| Collection<Binding> bindings = new ArrayList<>(); |
| for (Context ctx : contextSet.getContexts()) { |
| BindingTable table = getTable(ctx.getId()); |
| if (table != null) { |
| Collection<Binding> matches = table.getSequencesFor(cmd); |
| if (matches != null) { |
| bindings.addAll(matches); |
| } |
| } |
| } |
| return bindings; |
| } |
| |
| public boolean isPartialMatch(ContextSet contextSet, TriggerSequence sequence) { |
| List<Context> contexts = contextSet.getContexts(); |
| ListIterator<Context> it = contexts.listIterator(contexts.size()); |
| while (it.hasPrevious()) { |
| Context c = it.previous(); |
| BindingTable table = getTable(c.getId()); |
| if (table != null) { |
| if (table.isPartialMatch(sequence)) { |
| return true; |
| } |
| } |
| } |
| return false; |
| } |
| |
| public Collection<Binding> getPartialMatches(ContextSet contextSet, TriggerSequence sequence) { |
| ArrayList<Binding> bindings = new ArrayList<>(); |
| List<Context> contexts = contextSet.getContexts(); |
| ListIterator<Context> it = contexts.listIterator(contexts.size()); |
| while (it.hasPrevious()) { |
| Context c = it.previous(); |
| BindingTable table = getTable(c.getId()); |
| if (table != null) { |
| Collection<Binding> partialMatches = table.getPartialMatches(sequence); |
| if (partialMatches != null) { |
| bindings.addAll(partialMatches); |
| } |
| } |
| } |
| return bindings; |
| } |
| |
| /** |
| * @param activeSchemeIds |
| */ |
| public void setActiveSchemes(String[] activeSchemeIds) { |
| this.activeSchemeIds = activeSchemeIds; |
| BindingTable.BEST_SEQUENCE.setActiveSchemes(activeSchemeIds); |
| } |
| |
| /* |
| * Copied from org.eclipse.jface.bindings.BindingManager.compareSchemes(String, String) |
| * |
| * Returns an in based on scheme 1 < scheme 2 |
| */ |
| private final int compareSchemes(final String schemeId1, final String schemeId2) { |
| if (activeSchemeIds == null) { |
| return 0; |
| } |
| if (!schemeId2.equals(schemeId1)) { |
| for (final String schemePointer : activeSchemeIds) { |
| if (schemeId2.equals(schemePointer)) { |
| return 1; |
| } else if (schemeId1.equals(schemePointer)) { |
| return -1; |
| } |
| } |
| } |
| return 0; |
| } |
| } |