processing/app/src/processing/app/ui/ChangeDetector.java at master · hayscoding/processing · GitHub

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/* -*- mode: java; c-basic-offset: 2; indent-tabs-mode: nil -*- */

Part of the Processing project - http://processing.org

This program is free software; you can redistribute it and/or modify

it under the terms of the GNU General Public License version 2

as published by the Free Software Foundation.

This program 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 for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software Foundation, Inc.

51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

package processing.app.ui;

import java.awt.event.WindowEvent;

import java.awt.event.WindowFocusListener;

import java.io.File;

import java.io.IOException;

import java.util.ArrayList;

import java.util.Arrays;

import java.util.Collections;

import java.util.List;

import java.util.Map;

import java.util.Optional;

import java.util.function.Consumer;

import java.util.stream.Collectors;

import processing.app.Language;

import processing.app.Messages;

import processing.app.Preferences;

import processing.app.Sketch;

import processing.app.SketchCode;

public class ChangeDetector implements WindowFocusListener {

private final Sketch sketch;

private final Editor editor;

private List<SketchCode> ignoredRemovals = new ArrayList<>();

private List<SketchCode> ignoredModifications = new ArrayList<>();

// Windows and others seem to have a few hundred ms difference in reported

// times, so we're arbitrarily setting a gap in time here.

// Mac OS X has an (exactly) one second difference. Not sure if it's a Java

// bug or something else about how OS X is writing files.

static private final int MODIFICATION_WINDOW_MILLIS =

Preferences.getInteger("editor.watcher.window");

// Debugging this feature is particularly difficult, adding an option for it

static private final boolean DEBUG =

Preferences.getBoolean("editor.watcher.debug");

public ChangeDetector(Editor editor) {

this.sketch = editor.sketch;

this.editor = editor;

}

@Override

public void windowGainedFocus(WindowEvent e) {

if (Preferences.getBoolean("editor.watcher")) {

if (sketch != null) {

// make sure the sketch folder exists at all.

// if it does not, it will be re-saved, and no changes will be detected

sketch.ensureExistence();

checkFiles();

}

@Override

public void windowLostFocus(WindowEvent e) {

// Shouldn't need to do anything here, and not storing anything here b/c we

// don't want to assume a loss of focus is required before change detection

}

private void checkFiles() {

List<String> filenames = new ArrayList<>();

List<String> extensions = new ArrayList<>();

sketch.getSketchCodeFiles(filenames, extensions);

SketchCode[] codes = sketch.getCode();

// Separate codes with and without files

Map<Boolean, List<SketchCode>> existsMap = Arrays.stream(codes)

.collect(Collectors.groupingBy(code -> filenames.contains(code.getFileName())));

// ADDED FILES

List<String> codeFilenames = Arrays.stream(codes)

.map(SketchCode::getFileName)

.collect(Collectors.toList());

// Get filenames which are in filesystem but don't have code

List<String> addedFilenames = filenames.stream()

.filter(f -> !codeFilenames.contains(f))

.collect(Collectors.toList());

// Take action if there are any added files which were not previously ignored

boolean added = !addedFilenames.isEmpty();

// REMOVED FILES

// Get codes which don't have file

List<SketchCode> removedCodes = Optional.ofNullable(existsMap.get(Boolean.FALSE))

.orElse(Collections.emptyList());

List<SketchCode> removedCodesFinal = removedCodes.stream()

.filter(code -> !ignoredRemovals.contains(code))

.collect(Collectors.toList());

// Show prompt if there are any removed codes which were not previously ignored

boolean removed = !removedCodesFinal.isEmpty();

/// MODIFIED FILES

// Get codes which have file with different modification time

List<SketchCode> modifiedCodes = existsMap.containsKey(Boolean.TRUE) ?

existsMap.get(Boolean.TRUE) : Collections.emptyList();

List<SketchCode> modifiedCodesFinal = new ArrayList<>();

for (SketchCode code : modifiedCodes) {

if (ignoredModifications.contains(code)) continue;

long fileLastModified = code.getFile().lastModified();

long codeLastModified = code.getLastModified();

long diff = fileLastModified - codeLastModified;

if (fileLastModified == 0L || diff > MODIFICATION_WINDOW_MILLIS) {

modifiedCodesFinal.add(code);

}

// Show prompt if any open codes were modified

boolean modified = !modifiedCodesFinal.isEmpty();

// Clean ignore lists

ignoredModifications.retainAll(modifiedCodes);

ignoredRemovals.retainAll(removedCodes);

boolean changes = added || removed || modified;

// Do both PDE and disk change for any one file?

List<SketchCode> mergeConflicts = modifiedCodesFinal.stream()

.filter(SketchCode::isModified)

.collect(Collectors.toList());

boolean ask = !mergeConflicts.isEmpty() || removed;

if (DEBUG) {

System.out.println("ask: " + ask + "\n" +

"merge conflicts: " + mergeConflicts + ",\n" +

"added filenames: " + addedFilenames + ",\n" +

"removed codes: " + removedCodes + ",\n" +

"ignored removed: " + ignoredRemovals + ",\n" +

"modified codes: " + modifiedCodesFinal + "\n");

}

// No prompt yet.

if (changes) {

for (int i = 0; i < filenames.size(); i++) {

for (String addedTab : addedFilenames) {

if (filenames.get(i).equals(addedTab)) {

sketch.loadNewTab(filenames.get(i), extensions.get(i), true);

}

for (SketchCode modifiedCode : modifiedCodesFinal) {

if (!mergeConflicts.contains(modifiedCode)) {

sketch.loadNewTab(modifiedCode.getFileName(),

modifiedCode.getExtension(), false);

}

// Destructive actions, so prompt.

if (ask) {

sketch.updateSketchCodes();

showReloadPrompt(mergeConflicts, removedCodesFinal,

scReload -> {

try {

File file = scReload.getFile();

File autosave = File.createTempFile(scReload.getPrettyName(),

".autosave", file.getParentFile());

scReload.copyTo(autosave);

} catch (IOException e) {

Messages.showWarning("Could not autosave modified tab",

"Your changes to " + scReload.getPrettyName() +

" have not been saved, so we won't load the new version.", e);

scReload.setModified(true); // So we'll have another go at saving

// it later,

ignoredModifications.add(scReload); // but not create a loop.

return;

}

sketch.loadNewTab(scReload.getFileName(), scReload.getExtension(), false);

scKeep -> {

scKeep.setLastModified();

scKeep.setModified(true);

scDelete -> sketch.removeCode(scDelete),

scResave -> {

try {

scResave.save();

} catch (IOException e) {

if (sketch.getCode(0).equals(scResave)) {

// Not a fatal error; the sketch has to stay open if

// they're going to save the code that's in it.

Messages.showWarning(

scResave.getFileName() + " deleted and not re-saved",

"Your main tab was deleted, and Processing couldn't " +

"resave it.\nYour sketch won't work without the " +

"main tab.", e);

} else {

Messages.showWarning("Could not re-save deleted tab",

"Your copy of " + scResave.getPrettyName() +

" will stay in the editor.", e);

}

ignoredRemovals.add(scResave);

scResave.setModified(true); // So we'll have another go at

// saving it later.

}

);

}

editor.rebuildHeader();

sketch.setCurrentCode(sketch.getCurrentCodeIndex());

editor.repaintHeader();

editor.sketchChanged();

}

/**

* Prompt the user what to do about each tab. Passes the tab to the user's

* choice of Consumer. Won't let you delete the main tab.

private void showReloadPrompt(

List<SketchCode> mergeConflict, List<SketchCode> removed,

Consumer<SketchCode> modifiedReload, Consumer<SketchCode> modifiedKeep,

Consumer<SketchCode> delete, Consumer<SketchCode> deletedResave) {

for (SketchCode sc : mergeConflict) {

if (1 == Messages.showCustomQuestion(editor,

Language.text("change_detect.reload.title"),

Language.interpolate("change_detect.reload.question", sc.getFileName()),

Language.text("change_detect.reload.comment"),

Language.text("change_detect.button.keep"),

Language.text("change_detect.button.load_new"))) {

modifiedReload.accept(sc);

} else {

modifiedKeep.accept(sc);

}

for (SketchCode sc : removed) {

if (!sketch.getCode(0).equals(sc) &&

1 == Messages.showCustomQuestion(editor,

Language.text("change_detect.delete.title"),

Language.interpolate("change_detect.delete.question", sc.getFileName()),

Language.text("change_detect.delete.comment"),

Language.text("change_detect.button.resave"),

Language.text("change_detect.button.discard"))) {

delete.accept(sc);

} else {

deletedResave.accept(sc);

}

processing/app/src/processing/app/ui/ChangeDetector.java at master · hayscoding/processing · GitHub

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