filemanager.cpp 19.1 KB
Newer Older
con's avatar
con committed
1 2 3 4 5 6 7 8
/***************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2008 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact:  Qt Software Information (qt-info@nokia.com)
**
9 10 11
**
** Non-Open Source Usage
**
con's avatar
con committed
12 13 14
** Licensees may use this file in accordance with the Qt Beta Version
** License Agreement, Agreement version 2.2 provided with the Software or,
** alternatively, in accordance with the terms contained in a written
15 16 17 18
** agreement between you and Nokia.
**
** GNU General Public License Usage
**
con's avatar
con committed
19 20 21 22 23 24 25 26 27 28
** Alternatively, this file may be used under the terms of the GNU General
** Public License versions 2.0 or 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the packaging
** of this file.  Please review the following information to ensure GNU
** General Public Licensing requirements will be met:
**
** http://www.fsf.org/licensing/licenses/info/GPLv2.html and
** http://www.gnu.org/copyleft/gpl.html.
**
** In addition, as a special exception, Nokia gives you certain additional
29 30 31 32
** rights. These rights are described in the Nokia Qt GPL Exception
** version 1.2, included in the file GPL_EXCEPTION.txt in this package.
**
***************************************************************************/
hjk's avatar
hjk committed
33

con's avatar
con committed
34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465
#include "filemanager.h"
#include "ifile.h"
#include "mainwindow.h"
#include "saveitemsdialog.h"
#include "vcsmanager.h"
#include "editormanager.h"
#include "mimedatabase.h"
#include "iversioncontrol.h"

#include <QtCore/QDebug>
#include <QtCore/QSettings>
#include <QtCore/QFileInfo>
#include <QtCore/QFile>
#include <QtCore/QDir>
#include <QtCore/QTimer>
#include <QtCore/QFileSystemWatcher>
#include <QtGui/QFileDialog>
#include <QtGui/QMessageBox>

using namespace Core;
using namespace Core::Internal;

/*!
  \class FileManager
  \mainclass
  \ingroup qwb
  \inheaderfile filemanager.h
  \brief Manages a set of IFile objects.

  The FileManager service monitors a set of IFile's. Plugins should register
  files they work with at the service. The files the IFile's point to will be
  monitored at filesystem level. If a file changes, the status of the IFile's
  will be adjusted accordingly. Furthermore, on application exit the user will
  be asked to save all modified files.

  Different IFile objects in the set can point to the same file in the
  filesystem. The monitoring of a file can be blocked by blockFileChange(), and
  enabled again by unblockFileChange().

  The FileManager service also provides two convenience methods for saving
  files: saveModifiedFiles() and saveModifiedFilesSilently(). Both take a list
  of FileInterfaces as an argument, and return the list of files which were
  _not_ saved.

  The service also manages the list of recent files to be shown to the user
  (see addToRecentFiles() and recentFiles()).
 */

static const char *settingsGroup = "RecentFiles";
static const char *filesKey = "Files";

FileManager::FileManager(Core::ICore *core, MainWindow *mw) :
    QObject(mw),
    m_core(core),
    m_mainWindow(mw),
    m_fileWatcher(new QFileSystemWatcher(this)),
    m_blockActivated(false)
{
    connect(m_fileWatcher, SIGNAL(fileChanged(const QString&)),
        this, SLOT(changedFile(const QString&)));
    connect(m_mainWindow, SIGNAL(windowActivated()),
        this, SLOT(mainWindowActivated()));
    connect(m_core, SIGNAL(contextChanged(Core::IContext*)),
        this, SLOT(syncWithEditor(Core::IContext*)));

    QSettings *s = m_mainWindow->settings();
    s->beginGroup(QLatin1String(settingsGroup));
    m_recentFiles = s->value(QLatin1String(filesKey), QStringList()).toStringList();
    s->endGroup();
    for (QStringList::iterator it = m_recentFiles.begin(); it != m_recentFiles.end(); ) {
        if (QFileInfo(*it).isFile()) {
            ++it;
        } else {
            it = m_recentFiles.erase(it);
        }
    }
}

/*!
    \fn bool FileManager::addFiles(const QList<IFile *> &files)

    Adds a list of IFile's to the collection.

    Returns true if the file specified by \a files have not been yet part of the file list.
*/
bool FileManager::addFiles(const QList<IFile *> &files)
{
    bool filesAdded = false;
    foreach (IFile *file, files) {
        if (!file || m_managedFiles.contains(file))
            continue;
        connect(file, SIGNAL(changed()), this, SLOT(checkForNewFileName()));
        connect(file, SIGNAL(destroyed(QObject *)), this, SLOT(fileDestroyed(QObject *)));
        filesAdded = true;
        addWatch(fixFileName(file->fileName()));
        updateFileInfo(file);
    }
    return filesAdded;
}

/*!
    \fn bool FileManager::addFile(IFile *files)

    Adds a IFile object to the collection.

    Returns true if the file specified by \a file has not been yet part of the file list.
*/
bool FileManager::addFile(IFile *file)
{
    return addFiles(QList<IFile *>() << file);
}

void FileManager::fileDestroyed(QObject *obj)
{
    // we can't use qobject_cast here, because meta data is already destroyed
    IFile *file = static_cast<IFile*>(obj);
    const QString filename = m_managedFiles.value(file).fileName;
    m_managedFiles.remove(file);
    removeWatch(filename);
}

/*!
    \fn bool FileManager::removeFile(IFile *file)

    Removes a IFile object from the collection.

    Returns true if the file specified by \a file has been part of the file list.
*/
bool FileManager::removeFile(IFile *file)
{
    if (!file)
        return false;

    disconnect(file, SIGNAL(changed()), this, SLOT(checkForNewFileName()));
    disconnect(file, SIGNAL(destroyed(QObject *)), this, SLOT(fileDestroyed(QObject *)));

    if (!m_managedFiles.contains(file))
        return false;
    const FileInfo info = m_managedFiles.take(file);
    const QString filename = info.fileName;
    removeWatch(filename);
    return true;
}

void FileManager::addWatch(const QString &filename)
{
    if (!filename.isEmpty() && managedFiles(filename).isEmpty()) {
        m_fileWatcher->addPath(filename);
    }
}

void FileManager::removeWatch(const QString &filename)
{
    if (!filename.isEmpty() && managedFiles(filename).isEmpty()) {
        m_fileWatcher->removePath(filename);
    }
}

void FileManager::checkForNewFileName()
{
    IFile *file = qobject_cast<IFile *>(sender());
    Q_ASSERT(file);
    const QString newfilename = fixFileName(file->fileName());
    const QString oldfilename = m_managedFiles.value(file).fileName;
    if (!newfilename.isEmpty() && newfilename != oldfilename) {
        m_managedFiles[file].fileName = newfilename;
        removeWatch(oldfilename);
        addWatch(newfilename);
    }
}

// TODO Rename to nativeFileName
QString FileManager::fixFileName(const QString &fileName)
{
    QString s = fileName;
#ifdef Q_OS_WIN
    s = s.toLower();
#endif
    if (!QFile::exists(s))
        return QDir::toNativeSeparators(s);
    return QFileInfo(QDir::toNativeSeparators(s)).canonicalFilePath();
}

/*!
    \fn bool FileManager::isFileManaged(const QString  &fileName) const

    Returns true if at least one IFile in the set points to \a fileName.
*/
bool FileManager::isFileManaged(const QString &fileName) const
{
    if (fileName.isEmpty())
        return false;

    return !managedFiles(fixFileName(fileName)).isEmpty();
}

/*!
    \fn QList<IFile*> FileManager::modifiedFiles() const

    Returns the list of IFile's that have been modified.
*/
QList<IFile *> FileManager::modifiedFiles() const
{
    QList<IFile *> modifiedFiles;

    const QMap<IFile*, FileInfo>::const_iterator cend =  m_managedFiles.constEnd();
    for (QMap<IFile*, FileInfo>::const_iterator i = m_managedFiles.constBegin(); i != cend; ++i) {
        IFile *fi = i.key();
        if (fi->isModified())
            modifiedFiles << fi;
    }
    return modifiedFiles;
}

/*!
    \fn void FileManager::blockFileChange(IFile *file)

    Blocks the monitoring of the file the \a file argument points to.
*/
void FileManager::blockFileChange(IFile *file)
{
    if (!file->fileName().isEmpty())
        m_fileWatcher->removePath(file->fileName());
}

/*!
    \fn void FileManager::unblockFileChange(IFile *file)

    Enables the monitoring of the file the \a file argument points to, and update the status of the corresponding IFile's.
*/
void FileManager::unblockFileChange(IFile *file)
{
    foreach (IFile *managedFile, managedFiles(file->fileName()))
        updateFileInfo(managedFile);
    if (!file->fileName().isEmpty())
        m_fileWatcher->addPath(file->fileName());
}

void FileManager::updateFileInfo(IFile *file)
{
    const QString fixedname = fixFileName(file->fileName());
    const QFileInfo fi(file->fileName());
    FileInfo info;
    info.fileName = fixedname;
    info.modified = fi.lastModified();
    info.permissions = fi.permissions();
    m_managedFiles.insert(file, info);
}

/*!
    \fn QList<IFile*> FileManager::saveModifiedFilesSilently(const QList<IFile*> &files)

    Tries to save the files listed in \a files . Returns the files that could not be saved.
*/
QList<IFile *> FileManager::saveModifiedFilesSilently(const QList<IFile *> &files)
{
    return saveModifiedFiles(files, 0, true, QString());
}

/*!
    \fn QList<IFile*> FileManager::saveModifiedFiles(const QList<IFile*> &files, bool *cancelled, const QString &message)

    Asks the user whether to save the files listed in \a files . Returns the files that have not been saved.
*/
QList<IFile *> FileManager::saveModifiedFiles(const QList<IFile *> &files,
                                                     bool *cancelled, const QString &message)
{
    return saveModifiedFiles(files, cancelled, false, message);
}

static QMessageBox::StandardButton skipFailedPrompt(QWidget *parent, const QString &fileName)
{
    return QMessageBox::question(parent,
                                 QObject::tr("Can't save file"),
                                 QObject::tr("Can't save changes to '%1'. Do you want to continue and loose your changes?").arg(fileName),
                                 QMessageBox::YesToAll| QMessageBox::Yes|QMessageBox::No,
                                 QMessageBox::No);
}

QList<IFile *> FileManager::saveModifiedFiles(const QList<IFile *> &files,
                                                     bool *cancelled, bool silently, const QString &message)
{
    if (cancelled)
        (*cancelled) = false;

    QList<IFile *> notSaved;
    QMap<IFile*, QString> modifiedFiles;

    foreach (IFile *file, files) {
        if (file->isModified()) {
            QString name = file->fileName();
            if (name.isEmpty())
                name = file->suggestedFileName();

            // There can be several FileInterfaces pointing to the same file
            // Select one that is not readonly.
            if (!(modifiedFiles.values().contains(name)
                && file->isReadOnly()))
                modifiedFiles.insert(file, name);
        }
    }

    if (!modifiedFiles.isEmpty()) {
        QList<IFile *> filesToSave;
        QSet<IFile *> filesToOpen;
        if (silently) {
            filesToSave = modifiedFiles.keys();
        } else {
            SaveItemsDialog dia(m_mainWindow, modifiedFiles);
            if (!message.isEmpty())
                dia.setMessage(message);
            if (dia.exec() != QDialog::Accepted) {
                if (cancelled)
                    (*cancelled) = true;
                notSaved = modifiedFiles.keys();
                return notSaved;
            }
            filesToSave = dia.itemsToSave();
            filesToOpen = dia.itemsToOpen();
        }

        bool yestoall = false;
        foreach (IFile *file, filesToSave) {
            if (file->isReadOnly() && filesToOpen.contains(file)) {
                QString directory = QFileInfo(file->fileName()).absolutePath();
                IVersionControl *versionControl = m_mainWindow->vcsManager()->findVersionControlForDirectory(directory);
                if (versionControl)
                    versionControl->vcsOpen(file->fileName());
            }
            if (!file->isReadOnly() && !file->fileName().isEmpty()) {
                blockFileChange(file);
                const bool ok = file->save();
                unblockFileChange(file);
                if (!ok)
                    notSaved.append(file);
            } else if (QFile::exists(file->fileName()) && !file->isSaveAsAllowed()) {
                if (yestoall)
                    continue;
                const QFileInfo fi(file->fileName());
                switch (skipFailedPrompt(m_mainWindow, fi.fileName())) {
                case QMessageBox::YesToAll:
                    yestoall = true;
                    break;
                case QMessageBox::No:
                    if (cancelled)
                        *cancelled = true;
                    return filesToSave;
                default:
                    break;
                }
            } else {
                QString fileName = getSaveAsFileName(file);
                bool ok = false;
                if (!fileName.isEmpty()) {
                    blockFileChange(file);
                    ok = file->save(fileName);
                    unblockFileChange(file);
                }
                if (!ok)
                    notSaved.append(file);
            }
        }
    }
    return notSaved;
}

QString FileManager::getSaveFileNameWithExtension(const QString &title, const QString &path,
    const QString &fileFilter, const QString &extension)
{
    QString fileName;
    bool repeat;
    do {
        repeat = false;
        fileName = QFileDialog::getSaveFileName(m_mainWindow, title, path, fileFilter);
        if (!fileName.isEmpty() && !extension.isEmpty() && !fileName.endsWith(extension)) {
            fileName.append(extension);
            if (QFile::exists(fileName)) {
                if (QMessageBox::warning(m_mainWindow, tr("Overwrite?"),
                        tr("An item named '%1' already exists at this location. Do you want to overwrite it?").arg(fileName),
                        QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)
                    repeat = true;
            }
        }
    } while (repeat);
    return fileName;
}

/*!
    \fn QString FileManager::getSaveAsFileName(IFile *file)

    Asks the user for a new file name (Save File As) for /arg file.
*/
QString FileManager::getSaveAsFileName(IFile *file)
{
    if (!file)
        return QLatin1String("");
    QString absoluteFilePath = file->fileName();
    const QFileInfo fi(absoluteFilePath);
    QString fileName = fi.fileName();
    QString path = fi.absolutePath();
    if (absoluteFilePath.isEmpty()) {
        fileName = file->suggestedFileName();
        const QString defaultPath = file->defaultPath();
        if (!defaultPath.isEmpty())
            path = defaultPath;
    }
    QString filterString;
    QString preferredSuffix;
    if (const MimeType mt = m_core->mimeDatabase()->findByFile(fi)) {
        filterString = mt.filterString();
        preferredSuffix = mt.preferredSuffix();
    }

    absoluteFilePath = getSaveFileNameWithExtension(tr("Save File As"),
        path + QDir::separator() + fileName,
        filterString,
        preferredSuffix);
    return absoluteFilePath;
}

void FileManager::changedFile(const QString &file)
{
    const bool wasempty = m_changedFiles.isEmpty();
    foreach (IFile *fileinterface, managedFiles(file))
        m_changedFiles << fileinterface;
    if (wasempty && !m_changedFiles.isEmpty()) {
        QTimer::singleShot (200, this, SLOT(checkForReload()));
    }
}

void FileManager::mainWindowActivated()
{
466 467 468 469
    //we need to do this asynchronously because
    //opening a dialog ("Reload?") in a windowactivated event
    //freezes on Mac
    QTimer::singleShot(0, this, SLOT(checkForReload()));
con's avatar
con committed
470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596
}

void FileManager::checkForReload()
{
    if (QApplication::activeWindow() == m_mainWindow &&
        !m_blockActivated && !m_changedFiles.isEmpty()) {
        m_blockActivated = true;
        const QList<QPointer<IFile> > changed = m_changedFiles;
        m_changedFiles.clear();
        IFile::ReloadBehavior behavior =
            IFile::AskForReload;
        foreach (IFile *f, changed) {
            if (!f)
                continue;
            QFileInfo fi(f->fileName());
            FileInfo info = m_managedFiles.value(f);
            if (info.modified != fi.lastModified()
                    || info.permissions != fi.permissions()) {
                if (info.modified != fi.lastModified())
                    f->modified(&behavior);
                else {
                    IFile::ReloadBehavior tempBeh =
                        IFile::ReloadPermissions;
                    f->modified(&tempBeh);
                }
                updateFileInfo(f);

                // the file system watchers loses inodes when a file is removed/renamed. Work around it.
                m_fileWatcher->removePath(f->fileName());
                m_fileWatcher->addPath(f->fileName());
            }
        }
        m_blockActivated = false;
        checkForReload();
    }
}

void FileManager::syncWithEditor(Core::IContext *context)
{
    if (!context)
        return;

    Core::IEditor *editor = m_core->editorManager()->currentEditor();
    if (editor && (editor->widget() == context->widget()))
        setCurrentFile(editor->file()->fileName());
}

/*!
    \fn void FileManager::addToRecentFiles(const QString &fileName)

    Adds the \a fileName to the list of recent files.
*/
void FileManager::addToRecentFiles(const QString &fileName)
{
    if (fileName.isEmpty())
        return;
    QString prettyFileName(QDir::toNativeSeparators(fileName));
    m_recentFiles.removeAll(prettyFileName);
    if (m_recentFiles.count() > m_maxRecentFiles)
        m_recentFiles.removeLast();
    m_recentFiles.prepend(prettyFileName);
}

/*!
    \fn QStringList FileManager::recentFiles() const

    Returns the list of recent files.
*/
QStringList FileManager::recentFiles() const
{
    return m_recentFiles;
}

void FileManager::saveRecentFiles()
{
    QSettings *s = m_mainWindow->settings();
    s->beginGroup(QLatin1String(settingsGroup));
    s->setValue(QLatin1String(filesKey), m_recentFiles);
    s->endGroup();
}

/*!

  The current file is e.g. the file currently opened when an editor is active,
  or the selected file in case a Project Explorer is active ...

  \see currentFile
  */
void FileManager::setCurrentFile(const QString &filePath)
{
    if (m_currentFile == filePath)
        return;
    m_currentFile = filePath;
    emit currentFileChanged(m_currentFile);
}

/*!
  Returns the absolute path of the current file

  The current file is e.g. the file currently opened when an editor is active,
  or the selected file in case a Project Explorer is active ...

  \see setCurrentFile
  */
QString FileManager::currentFile() const
{
    return m_currentFile;
}

/*!
    \fn QList<IFile*> FileManager::managedFiles(const QString &fileName) const

    Returns the list one IFile's in the set that point to \a fileName.
*/
QList<IFile *> FileManager::managedFiles(const QString &fileName) const
{
    const QString fixedName = fixFileName(fileName);
    QList<IFile *> result;
    if (!fixedName.isEmpty()) {
        const QMap<IFile*, FileInfo>::const_iterator cend =  m_managedFiles.constEnd();
        for (QMap<IFile*, FileInfo>::const_iterator i = m_managedFiles.constBegin(); i != cend; ++i) {
            if (i.value().fileName == fixedName)
                result << i.key();
        }
    }
    return result;
}