| /* |
| * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package jdk.internal.jline.extra; |
| |
| import java.io.IOException; |
| import java.lang.reflect.Method; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.ListIterator; |
| import java.util.function.Supplier; |
| |
| import jdk.internal.jline.console.ConsoleReader; |
| import jdk.internal.jline.console.KeyMap; |
| import jdk.internal.jline.console.history.History; |
| import jdk.internal.jline.console.history.History.Entry; |
| import jdk.internal.jline.console.history.MemoryHistory; |
| |
| /*Public for tests (HistoryTest). |
| */ |
| public abstract class EditingHistory implements History { |
| |
| private final History fullHistory; |
| private History currentDelegate; |
| |
| protected EditingHistory(ConsoleReader in, Iterable<? extends String> originalHistory) { |
| MemoryHistory fullHistory = new MemoryHistory(); |
| fullHistory.setIgnoreDuplicates(false); |
| this.fullHistory = fullHistory; |
| this.currentDelegate = fullHistory; |
| bind(in, CTRL_UP, |
| (Runnable) () -> moveHistoryToSnippet(in, ((EditingHistory) in.getHistory())::previousSnippet)); |
| bind(in, CTRL_DOWN, |
| (Runnable) () -> moveHistoryToSnippet(in, ((EditingHistory) in.getHistory())::nextSnippet)); |
| if (originalHistory != null) { |
| load(originalHistory); |
| } |
| } |
| |
| private void moveHistoryToSnippet(ConsoleReader in, Supplier<Boolean> action) { |
| if (!action.get()) { |
| try { |
| in.beep(); |
| } catch (IOException ex) { |
| throw new IllegalStateException(ex); |
| } |
| } else { |
| try { |
| //could use: |
| //in.resetPromptLine(in.getPrompt(), in.getHistory().current().toString(), -1); |
| //but that would mean more re-writing on the screen, (and prints an additional |
| //empty line), so using setBuffer directly: |
| Method setBuffer = ConsoleReader.class.getDeclaredMethod("setBuffer", String.class); |
| |
| setBuffer.setAccessible(true); |
| setBuffer.invoke(in, in.getHistory().current().toString()); |
| in.flush(); |
| } catch (ReflectiveOperationException | IOException ex) { |
| throw new IllegalStateException(ex); |
| } |
| } |
| } |
| |
| private void bind(ConsoleReader in, String shortcut, Object action) { |
| KeyMap km = in.getKeys(); |
| for (int i = 0; i < shortcut.length(); i++) { |
| Object value = km.getBound(Character.toString(shortcut.charAt(i))); |
| if (value instanceof KeyMap) { |
| km = (KeyMap) value; |
| } else { |
| km.bind(shortcut.substring(i), action); |
| } |
| } |
| } |
| |
| private static final String CTRL_UP = "\033\133\061\073\065\101"; //Ctrl-UP |
| private static final String CTRL_DOWN = "\033\133\061\073\065\102"; //Ctrl-DOWN |
| |
| @Override |
| public int size() { |
| return currentDelegate.size(); |
| } |
| |
| @Override |
| public boolean isEmpty() { |
| return currentDelegate.isEmpty(); |
| } |
| |
| @Override |
| public int index() { |
| return currentDelegate.index(); |
| } |
| |
| @Override |
| public void clear() { |
| if (currentDelegate != fullHistory) |
| throw new IllegalStateException("narrowed"); |
| currentDelegate.clear(); |
| } |
| |
| @Override |
| public CharSequence get(int index) { |
| return currentDelegate.get(index); |
| } |
| |
| @Override |
| public void add(CharSequence line) { |
| NarrowingHistoryLine currentLine = null; |
| int origIndex = fullHistory.index(); |
| int fullSize; |
| try { |
| fullHistory.moveToEnd(); |
| fullSize = fullHistory.index(); |
| if (currentDelegate == fullHistory) { |
| if (origIndex < fullHistory.index()) { |
| for (Entry entry : fullHistory) { |
| if (!(entry.value() instanceof NarrowingHistoryLine)) |
| continue; |
| int[] cluster = ((NarrowingHistoryLine) entry.value()).span; |
| if (cluster[0] == origIndex && cluster[1] > cluster[0]) { |
| currentDelegate = new MemoryHistory(); |
| for (int i = cluster[0]; i <= cluster[1]; i++) { |
| currentDelegate.add(fullHistory.get(i)); |
| } |
| } |
| } |
| } |
| } |
| fullHistory.moveToEnd(); |
| while (fullHistory.previous()) { |
| CharSequence c = fullHistory.current(); |
| if (c instanceof NarrowingHistoryLine) { |
| currentLine = (NarrowingHistoryLine) c; |
| break; |
| } |
| } |
| } finally { |
| fullHistory.moveTo(origIndex); |
| } |
| if (currentLine == null || currentLine.span[1] != (-1)) { |
| line = currentLine = new NarrowingHistoryLine(line, fullSize); |
| } |
| StringBuilder complete = new StringBuilder(); |
| for (int i = currentLine.span[0]; i < fullSize; i++) { |
| complete.append(fullHistory.get(i)); |
| } |
| complete.append(line); |
| if (isComplete(complete)) { |
| currentLine.span[1] = fullSize; //TODO: +1? |
| currentDelegate = fullHistory; |
| } |
| fullHistory.add(line); |
| } |
| |
| protected abstract boolean isComplete(CharSequence input); |
| |
| @Override |
| public void set(int index, CharSequence item) { |
| if (currentDelegate != fullHistory) |
| throw new IllegalStateException("narrowed"); |
| currentDelegate.set(index, item); |
| } |
| |
| @Override |
| public CharSequence remove(int i) { |
| if (currentDelegate != fullHistory) |
| throw new IllegalStateException("narrowed"); |
| return currentDelegate.remove(i); |
| } |
| |
| @Override |
| public CharSequence removeFirst() { |
| if (currentDelegate != fullHistory) |
| throw new IllegalStateException("narrowed"); |
| return currentDelegate.removeFirst(); |
| } |
| |
| @Override |
| public CharSequence removeLast() { |
| if (currentDelegate != fullHistory) |
| throw new IllegalStateException("narrowed"); |
| return currentDelegate.removeLast(); |
| } |
| |
| @Override |
| public void replace(CharSequence item) { |
| if (currentDelegate != fullHistory) |
| throw new IllegalStateException("narrowed"); |
| currentDelegate.replace(item); |
| } |
| |
| @Override |
| public ListIterator<Entry> entries(int index) { |
| return currentDelegate.entries(index); |
| } |
| |
| @Override |
| public ListIterator<Entry> entries() { |
| return currentDelegate.entries(); |
| } |
| |
| @Override |
| public Iterator<Entry> iterator() { |
| return currentDelegate.iterator(); |
| } |
| |
| @Override |
| public CharSequence current() { |
| return currentDelegate.current(); |
| } |
| |
| @Override |
| public boolean previous() { |
| return currentDelegate.previous(); |
| } |
| |
| @Override |
| public boolean next() { |
| return currentDelegate.next(); |
| } |
| |
| @Override |
| public boolean moveToFirst() { |
| return currentDelegate.moveToFirst(); |
| } |
| |
| @Override |
| public boolean moveToLast() { |
| return currentDelegate.moveToLast(); |
| } |
| |
| @Override |
| public boolean moveTo(int index) { |
| return currentDelegate.moveTo(index); |
| } |
| |
| @Override |
| public void moveToEnd() { |
| currentDelegate.moveToEnd(); |
| } |
| |
| public boolean previousSnippet() { |
| while (previous()) { |
| if (current() instanceof NarrowingHistoryLine) { |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| public boolean nextSnippet() { |
| boolean success = false; |
| |
| while (next()) { |
| success = true; |
| |
| if (current() instanceof NarrowingHistoryLine) { |
| return true; |
| } |
| } |
| |
| return success; |
| } |
| |
| public final void load(Iterable<? extends String> originalHistory) { |
| NarrowingHistoryLine currentHistoryLine = null; |
| boolean start = true; |
| int currentLine = 0; |
| for (String historyItem : originalHistory) { |
| StringBuilder line = new StringBuilder(historyItem); |
| int trailingBackSlashes = countTrailintBackslashes(line); |
| boolean continuation = trailingBackSlashes % 2 != 0; |
| line.delete(line.length() - trailingBackSlashes / 2 - (continuation ? 1 : 0), line.length()); |
| if (start) { |
| class PersistentNarrowingHistoryLine extends NarrowingHistoryLine implements PersistentEntryMarker { |
| public PersistentNarrowingHistoryLine(CharSequence delegate, int start) { |
| super(delegate, start); |
| } |
| } |
| fullHistory.add(currentHistoryLine = new PersistentNarrowingHistoryLine(line, currentLine)); |
| } else { |
| class PersistentLine implements CharSequence, PersistentEntryMarker { |
| private final CharSequence delegate; |
| public PersistentLine(CharSequence delegate) { |
| this.delegate = delegate; |
| } |
| @Override public int length() { |
| return delegate.length(); |
| } |
| @Override public char charAt(int index) { |
| return delegate.charAt(index); |
| } |
| @Override public CharSequence subSequence(int start, int end) { |
| return delegate.subSequence(start, end); |
| } |
| @Override public String toString() { |
| return delegate.toString(); |
| } |
| } |
| fullHistory.add(new PersistentLine(line)); |
| } |
| start = !continuation; |
| currentHistoryLine.span[1] = currentLine; |
| currentLine++; |
| } |
| } |
| |
| public Collection<? extends String> save() { |
| Collection<String> result = new ArrayList<>(); |
| Iterator<Entry> entries = fullHistory.iterator(); |
| |
| if (entries.hasNext()) { |
| Entry entry = entries.next(); |
| while (entry != null) { |
| StringBuilder historyLine = new StringBuilder(entry.value()); |
| int trailingBackSlashes = countTrailintBackslashes(historyLine); |
| for (int i = 0; i < trailingBackSlashes; i++) { |
| historyLine.append("\\"); |
| } |
| entry = entries.hasNext() ? entries.next() : null; |
| if (entry != null && !(entry.value() instanceof NarrowingHistoryLine)) { |
| historyLine.append("\\"); |
| } |
| result.add(historyLine.toString()); |
| } |
| } |
| |
| return result; |
| } |
| |
| private int countTrailintBackslashes(CharSequence text) { |
| int count = 0; |
| |
| for (int i = text.length() - 1; i >= 0; i--) { |
| if (text.charAt(i) == '\\') { |
| count++; |
| } else { |
| break; |
| } |
| } |
| |
| return count; |
| } |
| |
| public List<String> currentSessionEntries() { |
| List<String> result = new ArrayList<>(); |
| |
| for (Entry e : fullHistory) { |
| if (!(e.value() instanceof PersistentEntryMarker)) { |
| result.add(e.value().toString()); |
| } |
| } |
| |
| return result; |
| } |
| |
| public void fullHistoryReplace(String source) { |
| fullHistory.removeLast(); |
| for (String line : source.split("\\R")) { |
| fullHistory.add(line); |
| } |
| } |
| |
| private class NarrowingHistoryLine implements CharSequence { |
| private final CharSequence delegate; |
| private final int[] span; |
| |
| public NarrowingHistoryLine(CharSequence delegate, int start) { |
| this.delegate = delegate; |
| this.span = new int[] {start, -1}; |
| } |
| |
| @Override |
| public int length() { |
| return delegate.length(); |
| } |
| |
| @Override |
| public char charAt(int index) { |
| return delegate.charAt(index); |
| } |
| |
| @Override |
| public CharSequence subSequence(int start, int end) { |
| return delegate.subSequence(start, end); |
| } |
| |
| @Override |
| public String toString() { |
| return delegate.toString(); |
| } |
| |
| } |
| |
| private interface PersistentEntryMarker {} |
| } |
| |