helpviewer_qtb.cpp 9.12 KB
Newer Older
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
**
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
**
**************************************************************************/

#include "helpviewer.h"

#if defined(QT_NO_WEBKIT)

#include "helpconstants.h"
#include "helpviewer_p.h"
#include "helpmanager.h"

#include <QtGui/QApplication>
#include <QtGui/QClipboard>
#include <QtGui/QContextMenuEvent>
#include <QtGui/QKeyEvent>
#include <QtGui/QMenu>

#include <QtHelp/QHelpEngineCore>

using namespace Find;
using namespace Help;
using namespace Help::Internal;

// -- HelpViewer

HelpViewer::HelpViewer(qreal zoom, QWidget *parent)
    : QTextBrowser(parent)
    , d(new HelpViewerPrivate(zoom))
{
56
57
58
59
60
61
62
    QPalette p = palette();
    p.setColor(QPalette::Inactive, QPalette::Highlight,
        p.color(QPalette::Active, QPalette::Highlight));
    p.setColor(QPalette::Inactive, QPalette::HighlightedText,
        p.color(QPalette::Active, QPalette::HighlightedText));
    setPalette(p);

63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
    installEventFilter(this);
    document()->setDocumentMargin(8);

    QFont font = viewerFont();
    font.setPointSize(int(font.pointSize() + zoom));
    setViewerFont(font);

    connect(this, SIGNAL(sourceChanged(QUrl)), this, SIGNAL(titleChanged()));
    connect(this, SIGNAL(loadFinished(bool)), this, SLOT(setLoadFinished(bool)));
}

HelpViewer::~HelpViewer()
{
    delete d;
}

QFont HelpViewer::viewerFont() const
{
    const QHelpEngineCore &engine = HelpManager::helpEngineCore();
    return qVariantValue<QFont>(engine.customValue(QLatin1String("font"),
        qApp->font()));
}

void HelpViewer::setViewerFont(const QFont &newFont)
{
    if (font() != newFont) {
        d->forceFont = true;
        setFont(newFont);
        d->forceFont = false;
    }
}

void HelpViewer::scaleUp()
{
    if (d->zoomCount < 10) {
        d->zoomCount++;
        d->forceFont = true;
        zoomIn();
        d->forceFont = false;
    }
}

void HelpViewer::scaleDown()
{
    if (d->zoomCount > -5) {
        d->zoomCount--;
        d->forceFont = true;
        zoomOut();
        d->forceFont = false;
    }
}

void HelpViewer::resetScale()
{
    if (d->zoomCount != 0) {
        d->forceFont = true;
        zoomOut(d->zoomCount);
        d->forceFont = false;
    }
    d->zoomCount = 0;
}

qreal HelpViewer::scale() const
{
    return d->zoomCount;
}

QString HelpViewer::title() const
{
    return documentTitle();
}

void HelpViewer::setTitle(const QString &title)
{
    setDocumentTitle(title);
}

QUrl HelpViewer::source() const
{
    return QTextBrowser::source();
}

void HelpViewer::setSource(const QUrl &url)
{
    const QString &string = url.toString();
    if (url.isValid() && string != QLatin1String("help")) {
        if (launchWithExternalApp(url))
            return;

kh1's avatar
kh1 committed
152
153
154
155
156
157
158
159
160
        QUrl resolvedUrl;
        if (url.scheme() == QLatin1String("http"))
            resolvedUrl = url;

        if (!resolvedUrl.isValid()) {
            const QHelpEngineCore &engine = LocalHelpManager::helpEngine();
            resolvedUrl = engine.findFile(url);
        }

161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
        if (resolvedUrl.isValid()) {
            QTextBrowser::setSource(resolvedUrl);
            emit loadFinished(true);
            return;
        }
    }

    QTextBrowser::setSource(url);
    setHtml(string == Help::Constants::AboutBlank ? AboutBlankPage
        : PageNotFoundMessage.arg(url.toString()));
    emit loadFinished(true);
}

QString HelpViewer::selectedText() const
{
    return textCursor().selectedText();
}

bool HelpViewer::isForwardAvailable() const
{
    return QTextBrowser::isForwardAvailable();
}

bool HelpViewer::isBackwardAvailable() const
{
    return QTextBrowser::isBackwardAvailable();
}

bool HelpViewer::findText(const QString &text, IFindSupport::FindFlags flags,
190
    bool incremental, bool fromSearch)
191
192
193
194
195
196
{
    QTextDocument *doc = document();
    QTextCursor cursor = textCursor();
    if (!doc || cursor.isNull())
        return false;

197
    const int position = cursor.selectionStart();
198
    if (incremental)
199
        cursor.setPosition(position);
200
201
202
203
204
205
206
207
208

    QTextDocument::FindFlags f = IFindSupport::textDocumentFlagsForFindFlags(flags);
    QTextCursor found = doc->find(text, cursor, f);
    if (found.isNull()) {
        if ((flags & Find::IFindSupport::FindBackward) == 0)
            cursor.movePosition(QTextCursor::Start);
        else
            cursor.movePosition(QTextCursor::End);
        found = doc->find(text, cursor, f);
209
210
211
212
213
214
215
216
217
218
219
220
221
222
    }

    if (fromSearch) {
        cursor.beginEditBlock();
        viewport()->setUpdatesEnabled(false);

        QTextCharFormat marker;
        marker.setForeground(Qt::red);
        cursor.movePosition(QTextCursor::Start);
        setTextCursor(cursor);

        while (find(text)) {
            QTextCursor hit = textCursor();
            hit.mergeCharFormat(marker);
223
        }
224
225
226

        viewport()->setUpdatesEnabled(true);
        cursor.endEditBlock();
227
    }
228
229
230
231
232

    bool cursorIsNull = found.isNull();
    if (cursorIsNull) {
        found = textCursor();
        found.setPosition(position);
233
    }
234
    setTextCursor(found);
235
    return !cursorIsNull;
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
}

// -- public slots

void HelpViewer::copy()
{
    QTextBrowser::copy();
}

void HelpViewer::forward()
{
    QTextBrowser::forward();
}

void HelpViewer::backward()
{
    QTextBrowser::backward();
}

// -- protected

void HelpViewer::keyPressEvent(QKeyEvent *e)
{
    if ((e->key() == Qt::Key_Home && e->modifiers() != Qt::NoModifier)
        || (e->key() == Qt::Key_End && e->modifiers() != Qt::NoModifier)) {
        QKeyEvent* event = new QKeyEvent(e->type(), e->key(), Qt::NoModifier,
            e->text(), e->isAutoRepeat(), e->count());
        e = event;
    }
    QTextBrowser::keyPressEvent(e);
}

void HelpViewer::wheelEvent(QWheelEvent *e)
{
    if (e->modifiers() == Qt::ControlModifier) {
        e->accept();
        e->delta() > 0 ? scaleUp() : scaleDown();
    } else {
        QTextBrowser::wheelEvent(e);
    }
}

void HelpViewer::mousePressEvent(QMouseEvent *e)
{
#ifdef Q_OS_LINUX
    if (handleForwardBackwardMouseButtons(e))
        return;
#endif
    QTextBrowser::mousePressEvent(e);
}

void HelpViewer::mouseReleaseEvent(QMouseEvent *e)
{
#ifndef Q_OS_LINUX
    if (handleForwardBackwardMouseButtons(e))
        return;
#endif

    bool controlPressed = e->modifiers() & Qt::ControlModifier;
    if ((controlPressed && d->hasAnchorAt(this, e->pos())) ||
        (e->button() == Qt::MidButton && d->hasAnchorAt(this, e->pos()))) {
        d->openLinkInNewPage();
        return;
    }

    QTextBrowser::mouseReleaseEvent(e);
}

// -- private slots

void HelpViewer::actionChanged()
{
    // stub
}

void HelpViewer::setLoadFinished(bool ok)
{
    Q_UNUSED(ok)
    emit sourceChanged(source());
}

// -- private

bool HelpViewer::eventFilter(QObject *obj, QEvent *event)
{
    if (event->type() == QEvent::FontChange && !d->forceFont)
        return true;
    return QTextBrowser::eventFilter(obj, event);
}

void HelpViewer::contextMenuEvent(QContextMenuEvent *event)
{
    QMenu menu(QLatin1String(""), 0);

    QUrl link;
    QAction *copyAnchorAction = 0;
    if (d->hasAnchorAt(this, event->pos())) {
        link = anchorAt(event->pos());
        if (link.isRelative())
            link = source().resolved(link);
        menu.addAction(tr("Open Link"), d, SLOT(openLink()));
        menu.addAction(tr("Open Link as New Page"), d, SLOT(openLinkInNewPage()));

        if (!link.isEmpty() && link.isValid())
            copyAnchorAction = menu.addAction(tr("Copy Link"));
    } else if (!selectedText().isEmpty()) {
        menu.addAction(tr("Copy"), this, SLOT(copy()));
    } else {
        menu.addAction(tr("Reload"), this, SLOT(reload()));
    }

    if (copyAnchorAction == menu.exec(event->globalPos()))
        QApplication::clipboard()->setText(link.toString());
}

QVariant HelpViewer::loadResource(int type, const QUrl &name)
{
    QByteArray ba;
    if (type < 4) {
        const QHelpEngineCore &engine = HelpManager::instance().helpEngineCore();
        ba = engine.fileData(name);
        if (name.toString().endsWith(QLatin1String(".svg"), Qt::CaseInsensitive)) {
            QImage image;
            image.loadFromData(ba, "svg");
            if (!image.isNull())
                return image;
        }
    }
    return ba;
}

#endif  // QT_NO_WEBKIT