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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2015 - ROLI Ltd.
Permission is granted to use this software under the terms of either:
a) the GPL v2 (or any later version)
b) the Affero GPL v3
Details of these licenses can be found at: www.gnu.org/licenses
JUCE 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.
------------------------------------------------------------------------------
To release a closed-source product which uses JUCE, commercial licenses are
available: visit www.juce.com for more information.
==============================================================================
*/
FileBasedDocument::FileBasedDocument (const String& fileExtension_,
const String& fileWildcard_,
const String& openFileDialogTitle_,
const String& saveFileDialogTitle_)
: changedSinceSave (false),
fileExtension (fileExtension_),
fileWildcard (fileWildcard_),
openFileDialogTitle (openFileDialogTitle_),
saveFileDialogTitle (saveFileDialogTitle_)
{
}
FileBasedDocument::~FileBasedDocument()
{
}
//==============================================================================
void FileBasedDocument::setChangedFlag (const bool hasChanged)
{
if (changedSinceSave != hasChanged)
{
changedSinceSave = hasChanged;
sendChangeMessage();
}
}
void FileBasedDocument::changed()
{
changedSinceSave = true;
sendChangeMessage();
}
//==============================================================================
void FileBasedDocument::setFile (const File& newFile)
{
if (documentFile != newFile)
{
documentFile = newFile;
changed();
}
}
//==============================================================================
Result FileBasedDocument::loadFrom (const File& newFile, const bool showMessageOnFailure)
{
MouseCursor::showWaitCursor();
const File oldFile (documentFile);
documentFile = newFile;
Result result (Result::fail (TRANS("The file doesn't exist")));
if (newFile.existsAsFile())
{
result = loadDocument (newFile);
if (result.wasOk())
{
setChangedFlag (false);
MouseCursor::hideWaitCursor();
setLastDocumentOpened (newFile);
return result;
}
}
documentFile = oldFile;
MouseCursor::hideWaitCursor();
if (showMessageOnFailure)
AlertWindow::showMessageBoxAsync (AlertWindow::WarningIcon,
TRANS("Failed to open file..."),
TRANS("There was an error while trying to load the file: FLNM")
.replace ("FLNM", "\n" + newFile.getFullPathName())
+ "\n\n"
+ result.getErrorMessage());
return result;
}
#if JUCE_MODAL_LOOPS_PERMITTED
Result FileBasedDocument::loadFromUserSpecifiedFile (const bool showMessageOnFailure)
{
FileChooser fc (openFileDialogTitle,
getLastDocumentOpened(),
fileWildcard);
if (fc.browseForFileToOpen())
return loadFrom (fc.getResult(), showMessageOnFailure);
return Result::fail (TRANS("User cancelled"));
}
static bool askToOverwriteFile (const File& newFile)
{
return AlertWindow::showOkCancelBox (AlertWindow::WarningIcon,
TRANS("File already exists"),
TRANS("There's already a file called: FLNM")
.replace ("FLNM", newFile.getFullPathName())
+ "\n\n"
+ TRANS("Are you sure you want to overwrite it?"),
TRANS("Overwrite"),
TRANS("Cancel"));
}
//==============================================================================
FileBasedDocument::SaveResult FileBasedDocument::save (const bool askUserForFileIfNotSpecified,
const bool showMessageOnFailure)
{
return saveAs (documentFile,
false,
askUserForFileIfNotSpecified,
showMessageOnFailure);
}
FileBasedDocument::SaveResult FileBasedDocument::saveAs (const File& newFile,
const bool warnAboutOverwritingExistingFiles,
const bool askUserForFileIfNotSpecified,
const bool showMessageOnFailure)
{
if (newFile == File())
{
if (askUserForFileIfNotSpecified)
return saveAsInteractive (true);
// can't save to an unspecified file
jassertfalse;
return failedToWriteToFile;
}
if (warnAboutOverwritingExistingFiles
&& newFile.exists()
&& ! askToOverwriteFile (newFile))
return userCancelledSave;
MouseCursor::showWaitCursor();
const File oldFile (documentFile);
documentFile = newFile;
const Result result (saveDocument (newFile));
if (result.wasOk())
{
setChangedFlag (false);
MouseCursor::hideWaitCursor();
sendChangeMessage(); // because the filename may have changed
return savedOk;
}
documentFile = oldFile;
MouseCursor::hideWaitCursor();
if (showMessageOnFailure)
AlertWindow::showMessageBoxAsync (AlertWindow::WarningIcon,
TRANS("Error writing to file..."),
TRANS("An error occurred while trying to save \"DCNM\" to the file: FLNM")
.replace ("DCNM", getDocumentTitle())
.replace ("FLNM", "\n" + newFile.getFullPathName())
+ "\n\n"
+ result.getErrorMessage());
sendChangeMessage(); // because the filename may have changed
return failedToWriteToFile;
}
FileBasedDocument::SaveResult FileBasedDocument::saveIfNeededAndUserAgrees()
{
if (! hasChangedSinceSaved())
return savedOk;
const int r = AlertWindow::showYesNoCancelBox (AlertWindow::QuestionIcon,
TRANS("Closing document..."),
TRANS("Do you want to save the changes to \"DCNM\"?")
.replace ("DCNM", getDocumentTitle()),
TRANS("Save"),
TRANS("Discard changes"),
TRANS("Cancel"));
if (r == 1) // save changes
return save (true, true);
if (r == 2) // discard changes
return savedOk;
return userCancelledSave;
}
File FileBasedDocument::getSuggestedSaveAsFile (const File& defaultFile)
{
return defaultFile.withFileExtension (fileExtension).getNonexistentSibling (true);
}
FileBasedDocument::SaveResult FileBasedDocument::saveAsInteractive (const bool warnAboutOverwritingExistingFiles)
{
File f;
if (documentFile.existsAsFile())
f = documentFile;
else
f = getLastDocumentOpened();
String legalFilename (File::createLegalFileName (getDocumentTitle()));
if (legalFilename.isEmpty())
legalFilename = "unnamed";
if (f.existsAsFile() || f.getParentDirectory().isDirectory())
f = f.getSiblingFile (legalFilename);
else
f = File::getSpecialLocation (File::userDocumentsDirectory).getChildFile (legalFilename);
f = getSuggestedSaveAsFile (f);
FileChooser fc (saveFileDialogTitle, f, fileWildcard);
if (fc.browseForFileToSave (warnAboutOverwritingExistingFiles))
{
File chosen (fc.getResult());
if (chosen.getFileExtension().isEmpty())
{
chosen = chosen.withFileExtension (fileExtension);
if (chosen.exists() && ! askToOverwriteFile (chosen))
return userCancelledSave;
}
setLastDocumentOpened (chosen);
return saveAs (chosen, false, false, true);
}
return userCancelledSave;
}
#endif
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