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#include "examplecontent.h"

#include "colors.h"

#include "menumanager.h"

#include "imageitem.h"

#include "headingitem.h"

ExampleContent::ExampleContent(const QString &name, QGraphicsScene *scene, QGraphicsItem *parent)

    : DemoItem(scene, parent)

{

    this->name = name;

    this->heading = 0;

    this->description = 0;

    this->screenshot = 0;

}

void ExampleContent::prepare()

{

    if (!this->prepared){

        this->prepared = true;

        this->createContent();

    }

}

void ExampleContent::animationStopped(int id)

{

    if (id == DemoItemAnimation::ANIM_OUT){

        // Free up some memory:

        delete this->heading;

        delete this->description;

        delete this->screenshot;

        this->heading = 0;

        this->description = 0;

        this->screenshot = 0;

        this->prepared = false;

    }

}

QString ExampleContent::loadDescription()

{

    QByteArray ba = MenuManager::instance()->getHtml(this->name);

    QDomDocument exampleDoc;

    exampleDoc.setContent(ba, false);

    QDomNodeList paragraphs = exampleDoc.elementsByTagName("p");

    if (paragraphs.length() < 1 && Colors::verbose)

        qDebug() << "- ExampleContent::loadDescription(): Could not load description:" << MenuManager::instance()->info[this->name]["docfile"];

    QString description = Colors::contentColor + QLatin1String("Could not load description. Ensure that the documentation for Qt is built.");

    for (int p = 0; p < int(paragraphs.length()); ++p) {

        description = this->extractTextFromParagraph(paragraphs.item(p));

        if (this->isSummary(description)) {

            break;

        }

    }

    return Colors::contentColor + description;

}

bool ExampleContent::isSummary(const QString &text)

{

    return (!text.contains("[") &&

        text.indexOf(QRegExp(QString("(In )?((The|This) )?(%1 )?.*(tutorial|example|demo|application)").arg(this->name), Qt::CaseInsensitive)) != -1);

}

QString ExampleContent::extractTextFromParagraph(const QDomNode &parentNode)

{

    QString description;

    QDomNode node = parentNode.firstChild();

    while (!node.isNull()) {

        QString beginTag;

        QString endTag;

        if (node.isText())

            description += Colors::contentColor + node.nodeValue();

        else if (node.hasChildNodes()) {

            if (node.nodeName() == "b") {

                beginTag = "<b>";

                endTag = "</b>";

            } else if (node.nodeName() == "a") {

                beginTag = Colors::contentColor;

                endTag = "</font>";

            } else if (node.nodeName() == "i") {

                beginTag = "<i>";

                endTag = "</i>";

            } else if (node.nodeName() == "tt") {

                beginTag = "<tt>";

                endTag = "</tt>";

            }

            description += beginTag + this->extractTextFromParagraph(node) + endTag;

        }

        node = node.nextSibling();

    }

    return description;

}

void ExampleContent::createContent()

{

    // Create the items:

    this->heading = new HeadingItem(this->name, this->scene(), this);

    this->description = new DemoTextItem(this->loadDescription(), Colors::contentFont(),

        Colors::heading, 500, this->scene(), this);

    int imgHeight = 340 - int(this->description->boundingRect().height()) + 50;

    this->screenshot = new ImageItem(QImage::fromData(MenuManager::instance()->getImage(this->name)),

          550, imgHeight, this->scene(), this);

    // Place the items on screen:

    this->heading->setPos(0, 3);

    this->description->setPos(0, this->heading->pos().y() + this->heading->boundingRect().height() + 10);

    this->screenshot->setPos(0, this->description->pos().y() + this->description->boundingRect().height() + 10);

}

QRectF ExampleContent::boundingRect() const

{

    return QRectF(0, 0, 500, 100);

}