view src/historywidget.cpp @ 425:ad106f5fe75f

Add "Ignore Files" and "Edit Ignored List" to Work menu (latter is subsumed from Advanced menu formerly).  Also subsume Serve via HTTP into File menu as Share Repository, and add a more helpful description of it. Remove Advanced menu

/* -*- 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) 2011 Chris Cannam
    Copyright (c) 2011 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 "historywidget.h"

#include "changesetscene.h"
#include "changesetview.h"
#include "panner.h"
#include "grapher.h"
#include "debug.h"
#include "uncommitteditem.h"

#include <iostream>

#include <QGridLayout>

HistoryWidget::HistoryWidget() :
    m_showUncommitted(false),
    m_refreshNeeded(false)
{
    m_panned = new ChangesetView;
    m_panner = new Panner;

    m_panned->setDragMode(QGraphicsView::ScrollHandDrag);
    m_panned->setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
    m_panned->setCacheMode(QGraphicsView::CacheNone);

    QGridLayout *layout = new QGridLayout;
    layout->addWidget(m_panned, 0, 0);
    layout->addWidget(m_panner, 0, 1);
    m_panner->setMaximumWidth(80);
    m_panner->connectToPanned(m_panned);

    setLayout(layout);
}

HistoryWidget::~HistoryWidget()
{
    clearChangesets();
}

QGraphicsScene *HistoryWidget::scene()
{
    return m_panned->scene();
}

void HistoryWidget::clearChangesets()
{
    foreach (Changeset *cs, m_changesets) delete cs;
    m_changesets.clear();
}

void HistoryWidget::setCurrent(QStringList ids, QString branch,
                               bool showUncommitted)
{
    if (m_currentIds == ids &&
        m_currentBranch == branch &&
        m_showUncommitted == showUncommitted) return;

    DEBUG << "HistoryWidget::setCurrent: " << ids.size() << " ids, "
          << "showUncommitted: " << showUncommitted << endl;

    m_currentIds.clear();
    m_currentBranch = branch;
    m_showUncommitted = showUncommitted;

    if (ids.empty()) return;

    foreach (QString id, ids) {
        m_currentIds.push_back(id);
    }

    m_refreshNeeded = true;
}
    
void HistoryWidget::parseNewLog(QString log)
{
    DEBUG << "HistoryWidget::parseNewLog: log has " << log.length() << " chars" << endl;
    Changesets csets = Changeset::parseChangesets(log);
    DEBUG << "HistoryWidget::parseNewLog: log has " << csets.size() << " changesets" << endl;
    replaceChangesets(csets);
    m_refreshNeeded = true;
}
    
void HistoryWidget::parseIncrementalLog(QString log)
{
    DEBUG << "HistoryWidget::parseIncrementalLog: log has " << log.length() << " chars" << endl;
    Changesets csets = Changeset::parseChangesets(log);
    DEBUG << "HistoryWidget::parseIncrementalLog: log has " << csets.size() << " changesets" << endl;
    if (!csets.empty()) {
        addChangesets(csets);
    }
    m_refreshNeeded = true;
}

void HistoryWidget::replaceChangesets(Changesets csets)
{
    QSet<QString> oldIds;
    foreach (Changeset *cs, m_changesets) {
        oldIds.insert(cs->id());
    }

    QSet<QString> newIds;
    foreach (Changeset *cs, csets) {
        if (!oldIds.contains(cs->id())) {
            newIds.insert(cs->id());
        }
    }

    if (newIds.size() == csets.size()) {
        // completely new set, unrelated to the old: don't mark new
        m_newIds.clear();
    } else {
        m_newIds = newIds;
    }

    clearChangesets();
    m_changesets = csets;
}

void HistoryWidget::addChangesets(Changesets csets)
{
    m_newIds.clear();

    if (csets.empty()) return;

    foreach (Changeset *cs, csets) {
        m_newIds.insert(cs->id());
    }

    DEBUG << "addChangesets: " << csets.size() << " new changesets have ("
          << m_changesets.size() << " already)" << endl;

    csets << m_changesets;
    m_changesets = csets;
}

void HistoryWidget::update()
{
    if (m_refreshNeeded) {
        layoutAll();
    }
}

void HistoryWidget::layoutAll()
{
    m_refreshNeeded = false;

    setChangesetParents();

    ChangesetScene *scene = new ChangesetScene();
    ChangesetItem *tipItem = 0;

    QGraphicsScene *oldScene = m_panned->scene();

    m_panned->setScene(0);
    m_panner->setScene(0);

    delete oldScene;

    QGraphicsItem *toFocus = 0;

    if (!m_changesets.empty()) {
	Grapher g(scene);
	try {
	    g.layout(m_changesets,
                     m_showUncommitted ? m_currentIds : QStringList(),
                     m_currentBranch);
	} catch (std::string s) {
	    std::cerr << "Internal error: Layout failed: " << s << std::endl;
	}
        toFocus = g.getUncommittedItem();
        if (!toFocus) {
            if (!m_currentIds.empty()) {
                toFocus = g.getItemFor(m_currentIds[0]);
            } else {
                toFocus = g.getItemFor(m_changesets[0]);
            }
        }
    }

    m_panned->setScene(scene);
    m_panner->setScene(scene);

    updateNewAndCurrentItems();

    if (toFocus) {
        toFocus->ensureVisible();
    }

    connectSceneSignals();
}

void HistoryWidget::setChangesetParents()
{
    for (int i = 0; i < m_changesets.size(); ++i) {
        Changeset *cs = m_changesets[i];
        // Need to reset this, as Grapher::layout will recalculate it
        // and we don't want to end up with twice the children for
        // each parent...
        cs->setChildren(QStringList());
    }
    for (int i = 0; i+1 < m_changesets.size(); ++i) {
        Changeset *cs = m_changesets[i];
        if (cs->parents().empty()) {
            QStringList list;
            list.push_back(m_changesets[i+1]->id());
            cs->setParents(list);
        }
    }
}

void HistoryWidget::updateNewAndCurrentItems()
{
    QGraphicsScene *scene = m_panned->scene();
    if (!scene) return;

    QList<QGraphicsItem *> items = scene->items();
    foreach (QGraphicsItem *it, items) {

        ChangesetItem *csit = dynamic_cast<ChangesetItem *>(it);
        if (!csit) continue;

        QString id = csit->getChangeset()->id();

        bool current = m_currentIds.contains(id);
        if (current) {
            DEBUG << "id " << id << " is current" << endl;
        }
        bool newid = m_newIds.contains(id);
        if (newid) {
            DEBUG << "id " << id << " is new" << endl;
        }

        if (csit->isCurrent() != current || csit->isNew() != newid) {
            csit->setCurrent(current);
            csit->setNew(newid);
            csit->update();
        }
    }
}

void HistoryWidget::connectSceneSignals()
{
    ChangesetScene *scene = qobject_cast<ChangesetScene *>(m_panned->scene());
    if (!scene) return;
    
    connect(scene, SIGNAL(commit()),
            this, SIGNAL(commit()));
    
    connect(scene, SIGNAL(revert()),
            this, SIGNAL(revert()));
    
    connect(scene, SIGNAL(diffWorkingFolder()),
            this, SIGNAL(diffWorkingFolder()));

    connect(scene, SIGNAL(showSummary()),
            this, SIGNAL(showSummary()));

    connect(scene, SIGNAL(showWork()),
            this, SIGNAL(showWork()));

    connect(scene, SIGNAL(newBranch()),
            this, SIGNAL(newBranch()));

    connect(scene, SIGNAL(noBranch()),
            this, SIGNAL(noBranch()));
    
    connect(scene, SIGNAL(updateTo(QString)),
            this, SIGNAL(updateTo(QString)));

    connect(scene, SIGNAL(diffToCurrent(QString)),
            this, SIGNAL(diffToCurrent(QString)));

    connect(scene, SIGNAL(diffToParent(QString, QString)),
            this, SIGNAL(diffToParent(QString, QString)));

    connect(scene, SIGNAL(showSummary(Changeset *)),
            this, SIGNAL(showSummary(Changeset *)));

    connect(scene, SIGNAL(mergeFrom(QString)),
            this, SIGNAL(mergeFrom(QString)));

    connect(scene, SIGNAL(newBranch(QString)),
            this, SIGNAL(newBranch(QString)));

    connect(scene, SIGNAL(tag(QString)),
            this, SIGNAL(tag(QString)));
}