view filestatuswidget.cpp @ 109:1721c580c10e

* Add a queueing mechanism for Hg actions, instead of refusing to start an action if something else is already happening.  This is essential now that actions can be prompted by asynchronous events (e.g. filesystem watcher).
 * Make Revert behave sensibly

/* -*- c-basic-offset: 4 indent-tabs-mode: nil -*-  vi:set ts=8 sts=4 sw=4: */

/*
    EasyMercurial

    Based on HgExplorer by Jari Korhonen
    Copyright (c) 2010 Jari Korhonen
    Copyright (c) 2010 Chris Cannam
    Copyright (c) 2010 Queen Mary, University of London
    
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
    published by the Free Software Foundation; either version 2 of the
    License, or (at your option) any later version.  See the file
    COPYING included with this distribution for more information.
*/

#include "filestatuswidget.h"

#include <QLabel>
#include <QListWidget>
#include <QGridLayout>
#include <QFileInfo>
#include <QApplication>
#include <QDateTime>

#include "debug.h"

FileStatusWidget::FileStatusWidget(QWidget *parent) :
    QWidget(parent),
    m_dateReference(0)
{
    QGridLayout *layout = new QGridLayout;
    setLayout(layout);

    int row = 0;
    
    layout->addWidget(new QLabel(tr("Local:")), row, 0);
    m_localPathLabel = new QLabel;
    QFont f(m_localPathLabel->font());
    f.setBold(true);
    m_localPathLabel->setFont(f);
    layout->addWidget(m_localPathLabel, row, 1);

    ++row;
    layout->addWidget(new QLabel(tr("Remote:")), row, 0);
    m_remoteURLLabel = new QLabel;
    layout->addWidget(m_remoteURLLabel, row, 1);

    ++row;
    layout->addWidget(new QLabel(tr("Branch:")), row, 0);
    m_branchLabel = new QLabel;
    layout->addWidget(m_branchLabel, row, 1);

    layout->setColumnStretch(1, 20);

    layout->addWidget(new QLabel("<qt><hr></qt>"), ++row, 0, 1, 2);

    m_simpleLabels[FileStates::Clean] = tr("Unmodified:");
    m_simpleLabels[FileStates::Modified] = tr("Modified:");
    m_simpleLabels[FileStates::Added] = tr("Added:");
    m_simpleLabels[FileStates::Removed] = tr("Removed:");
    m_simpleLabels[FileStates::Missing] = tr("Missing:");
    m_simpleLabels[FileStates::Unknown] = tr("Untracked:");

    m_descriptions[FileStates::Clean] = tr("You have not changed these files.");
    m_descriptions[FileStates::Modified] = tr("You have changed these files since you last committed them.");
    m_descriptions[FileStates::Added] = tr("These files will be added to version control next time you commit.");
    m_descriptions[FileStates::Removed] = tr("These files will be removed from version control next time you commit.<br>"
                                             "They will not be deleted from the local folder.");
    m_descriptions[FileStates::Missing] = tr("These files are recorded in the version control, but absent from your working folder.<br>"
                                             "If you deleted them by accident, select them here and use Revert to restore their previous contents.<br>"
                                             "If you deleted them intentionally, select them here and use Remove to tell the version control system about it.");
    m_descriptions[FileStates::Unknown] = tr("These files are in your working folder but are not under version control.<br>"
                                             "Select a file and use Add to place it under version control or Ignore to remove it from this list.");

    m_highlightExplanation = tr("Files highlighted <font color=red>in red</font> "
                                "have appeared since your most recent commit or update.");

    for (int i = int(FileStates::FirstState);
             i <= int(FileStates::LastState); ++i) {

        FileStates::State s = FileStates::State(i);

        QWidget *box = new QWidget;
        QGridLayout *boxlayout = new QGridLayout;
        boxlayout->setMargin(0);
        box->setLayout(boxlayout);

        boxlayout->addItem(new QSpacerItem(5, 5), 0, 0);

        boxlayout->addWidget(new QLabel(labelFor(s)), 1, 0);

        QListWidget *w = new QListWidget;
        m_stateListMap[s] = w;
        w->setSelectionMode(QListWidget::ExtendedSelection);
        boxlayout->addWidget(w, 2, 0);

        connect(w, SIGNAL(itemSelectionChanged()),
                this, SLOT(itemSelectionChanged()));

        layout->addWidget(box, ++row, 0, 1, 2);
        box->hide();
    }

    layout->setRowStretch(++row, 20);
}

FileStatusWidget::~FileStatusWidget()
{
    delete m_dateReference;
}

QString FileStatusWidget::labelFor(FileStates::State s, bool addHighlightExplanation)
{
    if (addHighlightExplanation) {
        return QString("<qt><b>%1</b><br>%2<br>%3</qt>")
                       .arg(m_simpleLabels[s])
                       .arg(m_descriptions[s])
                       .arg(m_highlightExplanation);
    } else {
        return QString("<qt><b>%1</b><br>%2</qt>")
                       .arg(m_simpleLabels[s])
                       .arg(m_descriptions[s]);
    }
}

void FileStatusWidget::itemSelectionChanged()
{
    m_selectedFiles.clear();

    DEBUG << "FileStatusWidget::itemSelectionChanged" << endl;

    foreach (QListWidget *w, m_stateListMap) {
        QList<QListWidgetItem *> sel = w->selectedItems();
        foreach (QListWidgetItem *i, sel) {
            m_selectedFiles.push_back(i->text());
            DEBUG << "file " << i->text() << " is selected" << endl;
        }
    }

    emit selectionChanged();
}

void FileStatusWidget::clearSelections()
{
    m_selectedFiles.clear();
    foreach (QListWidget *w, m_stateListMap) {
        w->clearSelection();
    }
}

bool FileStatusWidget::haveChangesToCommit() const
{
    return !m_fileStates.added().empty() ||
           !m_fileStates.removed().empty() ||
           !m_fileStates.modified().empty();
}

bool FileStatusWidget::haveSelection() const
{
    return !m_selectedFiles.empty();
}

QStringList FileStatusWidget::getAllSelectedFiles() const
{
    return m_selectedFiles;
}

QStringList FileStatusWidget::getSelectedCommittableFiles() const
{
    QStringList files;
    foreach (QString f, m_selectedFiles) {
        switch (m_fileStates.getStateOfFile(f)) {
        case FileStates::Added:
        case FileStates::Modified:
        case FileStates::Removed:
            files.push_back(f);
            break;
        default: break;
        }
    }
    return files;
}

QStringList FileStatusWidget::getAllCommittableFiles() const
{
    QStringList files;
    files << m_fileStates.getFilesInState(FileStates::Modified);
    files << m_fileStates.getFilesInState(FileStates::Added);
    files << m_fileStates.getFilesInState(FileStates::Removed);
    return files;
}

QStringList FileStatusWidget::getSelectedRevertableFiles() const
{
    QStringList files;
    foreach (QString f, m_selectedFiles) {
        switch (m_fileStates.getStateOfFile(f)) {
        case FileStates::Added:
        case FileStates::Modified:
        case FileStates::Removed:
        case FileStates::Missing:
            files.push_back(f);
            break;
        default: break;
        }
    }
    return files;
}

QStringList FileStatusWidget::getAllRevertableFiles() const
{
    QStringList files;
    files << m_fileStates.getFilesInState(FileStates::Modified);
    files << m_fileStates.getFilesInState(FileStates::Added);
    files << m_fileStates.getFilesInState(FileStates::Removed);
    files << m_fileStates.getFilesInState(FileStates::Missing);
    return files;
}

QStringList FileStatusWidget::getSelectedAddableFiles() const
{
    QStringList files;
    foreach (QString f, m_selectedFiles) {
        switch (m_fileStates.getStateOfFile(f)) {
        case FileStates::Unknown:
        case FileStates::Removed:
            files.push_back(f);
            break;
        default: break;
        }
    }
    return files;
}

QStringList FileStatusWidget::getAllAddableFiles() const
{
    QStringList files;
    files << m_fileStates.getFilesInState(FileStates::Removed);
    files << m_fileStates.getFilesInState(FileStates::Unknown);
    return files;
}

QStringList FileStatusWidget::getSelectedRemovableFiles() const
{
    QStringList files;
    foreach (QString f, m_selectedFiles) {
        switch (m_fileStates.getStateOfFile(f)) {
        case FileStates::Clean:
        case FileStates::Added:
        case FileStates::Modified:
        case FileStates::Missing:
            files.push_back(f);
            break;
        default: break;
        }
    }
    return files;
}

QStringList FileStatusWidget::getAllRemovableFiles() const
{
    QStringList files;
    files << m_fileStates.getFilesInState(FileStates::Clean);
    files << m_fileStates.getFilesInState(FileStates::Added);
    files << m_fileStates.getFilesInState(FileStates::Modified);
    files << m_fileStates.getFilesInState(FileStates::Missing);
    return files;
}

void
FileStatusWidget::setLocalPath(QString p)
{
    m_localPath = p;
    m_localPathLabel->setText(p);
    delete m_dateReference;
    m_dateReference = new QFileInfo(p + "/.hg/dirstate");
    if (!m_dateReference->exists() ||
        !m_dateReference->isFile() ||
        !m_dateReference->isReadable()) {
        DEBUG << "FileStatusWidget::setLocalPath: date reference file "
                << m_dateReference->absoluteFilePath()
                << " does not exist, is not a file, or cannot be read"
                << endl;
        delete m_dateReference;
        m_dateReference = 0;
    }
}

void
FileStatusWidget::setRemoteURL(QString r)
{
    m_remoteURL = r;
    m_remoteURLLabel->setText(r);
}

void
FileStatusWidget::setFileStates(FileStates p)
{
    m_fileStates = p;
    updateWidgets();
}

void
FileStatusWidget::setBranch(QString b)
{
    m_branch = b;
    m_branchLabel->setText(b);
}

void
FileStatusWidget::updateWidgets()
{
    QDateTime lastInteractionTime;
    if (m_dateReference) {
        lastInteractionTime = m_dateReference->lastModified();
        DEBUG << "reference time: " << lastInteractionTime << endl;
    }

    QSet<QString> selectedFiles;
    foreach (QString f, m_selectedFiles) selectedFiles.insert(f);

    foreach (FileStates::State s, m_stateListMap.keys()) {

        QListWidget *w = m_stateListMap[s];
        w->clear();
        QStringList files = m_fileStates.getFilesInState(s);

        QStringList highPriority, lowPriority;

        foreach (QString file, files) {

            bool highlighted = false;

            if (s == FileStates::Unknown) {
                // We want to highlight untracked files that have appeared
                // since the last interaction with the repo
                QString fn(m_localPath + "/" + file);
                DEBUG << "comparing with " << fn << endl;
                QFileInfo fi(fn);
                if (fi.exists() && fi.created() > lastInteractionTime) {
                    DEBUG << "file " << fn << " is newer (" << fi.lastModified()
                            << ") than reference" << endl;
                    highlighted = true;
                }
            }

            if (highlighted) {
                highPriority.push_back(file);
            } else {
                lowPriority.push_back(file);
            }
        }

        foreach (QString file, highPriority) {
            QListWidgetItem *item = new QListWidgetItem(file);
            w->addItem(item);
            item->setForeground(Qt::red); //!!! and a nice gold star
            item->setSelected(selectedFiles.contains(file));
        }

        foreach (QString file, lowPriority) {
            QListWidgetItem *item = new QListWidgetItem(file);
            w->addItem(item);
            item->setSelected(selectedFiles.contains(file));
        }

        setLabelFor(w, s, !highPriority.empty());

        w->parentWidget()->setVisible(!files.empty());
    }
}

void FileStatusWidget::setLabelFor(QWidget *w, FileStates::State s, bool addHighlight)
{
    QString text = labelFor(s, addHighlight);
    QWidget *p = w->parentWidget();
    QList<QLabel *> ql = p->findChildren<QLabel *>();
    if (!ql.empty()) ql[0]->setText(text);
}