Carla/source/modules/juce_gui_basics/filebrowser/juce_FilenameComponent.cpp

/*
  ==============================================================================

   This file is part of the JUCE 6 technical preview.
   Copyright (c) 2020 - Raw Material Software Limited

   You may use this code under the terms of the GPL v3
   (see www.gnu.org/licenses).

   For this technical preview, this file is not subject to commercial licensing.

   JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
   EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
   DISCLAIMED.

  ==============================================================================
*/

namespace juce
{

FilenameComponent::FilenameComponent (const String& name,
                                      const File& currentFile,
                                      bool canEditFilename,
                                      bool isDirectory,
                                      bool isForSaving,
                                      const String& fileBrowserWildcard,
                                      const String& suffix,
                                      const String& textWhenNothingSelected)
    : Component (name),
      isDir (isDirectory),
      isSaving (isForSaving),
      wildcard (fileBrowserWildcard),
      enforcedSuffix (suffix)
{
    addAndMakeVisible (filenameBox);
    filenameBox.setEditableText (canEditFilename);
    filenameBox.setTextWhenNothingSelected (textWhenNothingSelected);
    filenameBox.setTextWhenNoChoicesAvailable (TRANS ("(no recently selected files)"));
    filenameBox.onChange = [this] { setCurrentFile (getCurrentFile(), true); };

    setBrowseButtonText ("...");

    setCurrentFile (currentFile, true, dontSendNotification);
}

FilenameComponent::~FilenameComponent()
{
}

//==============================================================================
void FilenameComponent::paintOverChildren (Graphics& g)
{
    if (isFileDragOver)
    {
        g.setColour (Colours::red.withAlpha (0.2f));
        g.drawRect (getLocalBounds(), 3);
    }
}

void FilenameComponent::resized()
{
    getLookAndFeel().layoutFilenameComponent (*this, &filenameBox, browseButton.get());
}

KeyboardFocusTraverser* FilenameComponent::createFocusTraverser()
{
    // This prevents the sub-components from grabbing focus if the
    // FilenameComponent has been set to refuse focus.
    return getWantsKeyboardFocus() ? Component::createFocusTraverser() : nullptr;
}

void FilenameComponent::setBrowseButtonText (const String& newBrowseButtonText)
{
    browseButtonText = newBrowseButtonText;
    lookAndFeelChanged();
}

void FilenameComponent::lookAndFeelChanged()
{
    browseButton.reset();
    browseButton.reset (getLookAndFeel().createFilenameComponentBrowseButton (browseButtonText));
    addAndMakeVisible (browseButton.get());
    browseButton->setConnectedEdges (Button::ConnectedOnLeft);
    browseButton->onClick = [this] { showChooser(); };
    resized();
}

void FilenameComponent::setTooltip (const String& newTooltip)
{
    SettableTooltipClient::setTooltip (newTooltip);
    filenameBox.setTooltip (newTooltip);
}

void FilenameComponent::setDefaultBrowseTarget (const File& newDefaultDirectory)
{
    defaultBrowseFile = newDefaultDirectory;
}

File FilenameComponent::getLocationToBrowse()
{
    if (lastFilename.isEmpty() && defaultBrowseFile != File())
        return defaultBrowseFile;

    return getCurrentFile();
}

void FilenameComponent::showChooser()
{
   #if JUCE_MODAL_LOOPS_PERMITTED
    FileChooser fc (isDir ? TRANS ("Choose a new directory")
                          : TRANS ("Choose a new file"),
                    getLocationToBrowse(),
                    wildcard);

    if (isDir ? fc.browseForDirectory()
              : (isSaving ? fc.browseForFileToSave (false)
                          : fc.browseForFileToOpen()))
    {
        setCurrentFile (fc.getResult(), true);
    }
   #else
    ignoreUnused (isSaving);
    jassertfalse; // needs rewriting to deal with non-modal environments
   #endif
}

bool FilenameComponent::isInterestedInFileDrag (const StringArray&)
{
    return true;
}

void FilenameComponent::filesDropped (const StringArray& filenames, int, int)
{
    isFileDragOver = false;
    repaint();

    const File f (filenames[0]);

    if (f.exists() && (f.isDirectory() == isDir))
        setCurrentFile (f, true);
}

void FilenameComponent::fileDragEnter (const StringArray&, int, int)
{
    isFileDragOver = true;
    repaint();
}

void FilenameComponent::fileDragExit (const StringArray&)
{
    isFileDragOver = false;
    repaint();
}

//==============================================================================
String FilenameComponent::getCurrentFileText() const
{
    return filenameBox.getText();
}

File FilenameComponent::getCurrentFile() const
{
    auto f = File::getCurrentWorkingDirectory().getChildFile (getCurrentFileText());

    if (enforcedSuffix.isNotEmpty())
        f = f.withFileExtension (enforcedSuffix);

    return f;
}

void FilenameComponent::setCurrentFile (File newFile,
                                        const bool addToRecentlyUsedList,
                                        NotificationType notification)
{
    if (enforcedSuffix.isNotEmpty())
        newFile = newFile.withFileExtension (enforcedSuffix);

    if (newFile.getFullPathName() != lastFilename)
    {
        lastFilename = newFile.getFullPathName();

        if (addToRecentlyUsedList)
            addRecentlyUsedFile (newFile);

        filenameBox.setText (lastFilename, dontSendNotification);

        if (notification != dontSendNotification)
        {
            triggerAsyncUpdate();

            if (notification == sendNotificationSync)
                handleUpdateNowIfNeeded();
        }
    }
}

void FilenameComponent::setFilenameIsEditable (const bool shouldBeEditable)
{
    filenameBox.setEditableText (shouldBeEditable);
}

StringArray FilenameComponent::getRecentlyUsedFilenames() const
{
    StringArray names;

    for (int i = 0; i < filenameBox.getNumItems(); ++i)
        names.add (filenameBox.getItemText (i));

    return names;
}

void FilenameComponent::setRecentlyUsedFilenames (const StringArray& filenames)
{
    if (filenames != getRecentlyUsedFilenames())
    {
        filenameBox.clear();

        for (int i = 0; i < jmin (filenames.size(), maxRecentFiles); ++i)
            filenameBox.addItem (filenames[i], i + 1);
    }
}

void FilenameComponent::setMaxNumberOfRecentFiles (const int newMaximum)
{
    maxRecentFiles = jmax (1, newMaximum);

    setRecentlyUsedFilenames (getRecentlyUsedFilenames());
}

void FilenameComponent::addRecentlyUsedFile (const File& file)
{
    auto files = getRecentlyUsedFilenames();

    if (file.getFullPathName().isNotEmpty())
    {
        files.removeString (file.getFullPathName(), true);
        files.insert (0, file.getFullPathName());

        setRecentlyUsedFilenames (files);
    }
}

//==============================================================================
void FilenameComponent::addListener (FilenameComponentListener* const listener)
{
    listeners.add (listener);
}

void FilenameComponent::removeListener (FilenameComponentListener* const listener)
{
    listeners.remove (listener);
}

void FilenameComponent::handleAsyncUpdate()
{
    Component::BailOutChecker checker (this);
    listeners.callChecked (checker, [this] (FilenameComponentListener& l) { l.filenameComponentChanged (this); });
}

} // namespace juce