Diffstat (limited to 'noncore/apps/opie-write/qstylesheet.cpp') (more/less context) (ignore whitespace changes)
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diff --git a/noncore/apps/opie-write/qstylesheet.cpp b/noncore/apps/opie-write/qstylesheet.cpp new file mode 100644 index 0000000..7ab9ec6 --- a/dev/null +++ b/noncore/apps/opie-write/qstylesheet.cpp @@ -0,0 +1,1484 @@ +/**************************************************************************** +** $Id$ +** +** Implementation of the QStyleSheet class +** +** Created : 990101 +** +** Copyright (C) 1992-2000 Trolltech AS. All rights reserved. +** +** This file is part of the kernel module of the Qt GUI Toolkit. +** +** This file may be distributed under the terms of the Q Public License +** as defined by Trolltech AS of Norway and appearing in the file +** LICENSE.QPL included in the packaging of this file. +** +** This file may be distributed and/or modified under the terms of the +** GNU General Public License version 2 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. +** +** Licensees holding valid Qt Enterprise Edition or Qt Professional Edition +** licenses may use this file in accordance with the Qt Commercial License +** Agreement provided with the Software. +** +** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE +** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. +** +** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for +** information about Qt Commercial License Agreements. +** See http://www.trolltech.com/qpl/ for QPL licensing information. +** See http://www.trolltech.com/gpl/ for GPL licensing information. +** +** Contact info@trolltech.com if any conditions of this licensing are +** not clear to you. +** +**********************************************************************/ + +#include "qstylesheet.h" + +#include "qrichtext_p.h" +#include "qlayout.h" +#include "qpainter.h" +#include "qcleanuphandler.h" + +#include <stdio.h> + +using namespace Qt3; + +namespace Qt3 { + +class QStyleSheetItemData +{ +public: + QStyleSheetItem::DisplayMode disp; + int fontitalic; + int fontunderline; + int fontweight; + int fontsize; + int fontsizelog; + int fontsizestep; + int lineSpacing; + QString fontfamily; + QStyleSheetItem *parentstyle; + QString stylename; + int ncolumns; + QColor col; + bool anchor; + int align; + QStyleSheetItem::VerticalAlignment valign; + int margin[5]; + QStyleSheetItem::ListStyle list; + QStyleSheetItem::WhiteSpaceMode whitespacemode; + QString contxt; + bool selfnest; + QStyleSheet* sheet; +}; + +} + +/*! + \class QStyleSheetItem qstylesheet.h + \ingroup text + \brief The QStyleSheetItem class provides an encapsulation of a set of text styles. + + A style sheet item consists of a name and a set of attributes that + specifiy its font, color, etc. When used in a \link QStyleSheet + style sheet\endlink (see styleSheet()), items define the name() of a + rich text tag and the display property changes associated with it. + + The \link QStyleSheetItem::DisplayMode display mode\endlink + attribute indicates whether the item is a block, an inline element + or a list element; see setDisplayMode(). The treatment of whitespace + is controlled by the \link QStyleSheetItem::WhiteSpaceMode white + space mode\endlink; see setWhiteSpaceMode(). An item's margins are + set with setMargin(), and line spacing is set with setLineSpacing(). + In the case of list items, the list style is set with + setListStyle(). An item may be a hypertext link anchor; see + setAnchor(). Other attributes are set with setAlignment(), + setVerticalAlignment(), setFontFamily(), setFontSize(), + setFontWeight(), setFontItalic(), setFontUnderline() and setColor(). +*/ + +/*! \enum QStyleSheetItem::AdditionalStyleValues + \internal +*/ + +/*! \enum QStyleSheetItem::WhiteSpaceMode + + This enum defines the ways in which QStyleSheet can treat whitespace. There are three values at present: + + \value WhiteSpaceNormal any sequence of whitespace (including + line-breaks) is equivalent to a single space. + + \value WhiteSpacePre whitespace must be output exactly as given + in the input. + + \value WhiteSpaceNoWrap multiple spaces are collapsed as with + WhiteSpaceNormal, but no automatic line-breaks occur. To break lines manually, + use the \c{<br>} tag. + +*/ + +/*! \enum QStyleSheetItem::Margin + + \value MarginLeft left margin + \value MarginRight right margin + \value MarginTop top margin + \value MarginBottom bottom margin + \value MarginAll all margins (left, right, top and bottom) + \value MarginVertical top and bottom margins + \value MarginHorizontal left and right margins + \value MarginFirstLine margin (indentation) of the first line of a paragarph (in addition to the MarginLeft of the paragraph) +*/ + +/*! + Constructs a new style named \a name for the stylesheet \a parent. + + All properties in QStyleSheetItem are initially in the "do not change" state, + except \link QStyleSheetItem::DisplayMode display mode\endlink, which defaults + to \c DisplayInline. +*/ +QStyleSheetItem::QStyleSheetItem( QStyleSheet* parent, const QString& name ) +{ + d = new QStyleSheetItemData; + d->stylename = name.lower(); + d->sheet = parent; + init(); + if (parent) + parent->insert( this ); +} + +/*! + Copy constructor. Constructs a copy of \a other that is + not bound to any style sheet. + */ +QStyleSheetItem::QStyleSheetItem( const QStyleSheetItem & other ) +{ + d = new QStyleSheetItemData; + *d = *other.d; +} + + +/*! + Destroys the style. Note that QStyleSheetItem objects become owned + by QStyleSheet when they are created. + */ +QStyleSheetItem::~QStyleSheetItem() +{ + delete d; +} + + + +/*! + Returns the style sheet this item is in. + */ +QStyleSheet* QStyleSheetItem::styleSheet() +{ + return d->sheet; +} + +/*! + \overload + Returns the style sheet this item is in. + */ +const QStyleSheet* QStyleSheetItem::styleSheet() const +{ + return d->sheet; +} + +/*! + \internal + Internal initialization + */ +void QStyleSheetItem::init() +{ + d->disp = DisplayInline; + + d->fontitalic = Undefined; + d->fontunderline = Undefined; + d->fontweight = Undefined; + d->fontsize = Undefined; + d->fontsizelog = Undefined; + d->fontsizestep = 0; + d->ncolumns = Undefined; + d->col = QColor(); // !isValid() + d->anchor = FALSE; + d->align = Undefined; + d->valign = VAlignBaseline; + d->margin[0] = Undefined; + d->margin[1] = Undefined; + d->margin[2] = Undefined; + d->margin[3] = Undefined; + d->margin[4] = Undefined; + d->list = QStyleSheetItem::ListDisc; + d->whitespacemode = QStyleSheetItem::WhiteSpaceNormal; + d->selfnest = TRUE; + d->lineSpacing = Undefined; +} + +/*! + Returns the name of the style item. +*/ +QString QStyleSheetItem::name() const +{ + return d->stylename; +} + +/*! + Returns the \link QStyleSheetItem::DisplayMode display mode\endlink + of the style. + + \sa setDisplayMode() + */ +QStyleSheetItem::DisplayMode QStyleSheetItem::displayMode() const +{ + return d->disp; +} + +/*! \enum QStyleSheetItem::DisplayMode + + This enum type defines the way adjacent elements are displayed. The possible values are: + + \value DisplayBlock elements are displayed as a rectangular block + (e.g. \c{<p>...</p>}). + + \value DisplayInline elements are displayed in a horizontally flowing + sequence (e.g. \c{<em>...</em>}). + + \value DisplayListItem elements are displayed in a vertical sequence + (e.g. \c{<li>...</li>}). + + \value DisplayNone elements are not displayed at all. +*/ + +/*! + Sets the display mode of the style to \a m. + + \sa displayMode() + */ +void QStyleSheetItem::setDisplayMode(DisplayMode m) +{ + d->disp=m; +} + + +/*! + Returns the alignment of this style. Possible values are AlignAuto, AlignLeft, + AlignRight, AlignCenter and AlignJustify. + + \sa setAlignment(), Qt::AlignmentFlags + */ +int QStyleSheetItem::alignment() const +{ + return d->align; +} + +/*! + Sets the alignment to \a f. This only makes sense for styles with a + \link QStyleSheetItem::DisplayMode display mode\endlink of + DisplayBlock. Possible values are AlignAuto, AlignLeft, AlignRight, + AlignCenter and AlignJustify. + + \sa alignment(), displayMode(), Qt::AlignmentFlags + */ +void QStyleSheetItem::setAlignment( int f ) +{ + d->align = f; +} + + +/*! + Returns the vertical alignment of the style. Possible values are + VAlignBaseline, VAlignSub and VAlignSuper. + + psa setVerticalAlignment() + */ +QStyleSheetItem::VerticalAlignment QStyleSheetItem::verticalAlignment() const +{ + return d->valign; +} + +/*! \enum QStyleSheetItem::VerticalAlignment + + This enum type defines the way elements are aligned vertically. This + is supported for text elements only. The possible values are: + + \value VAlignBaseline align the baseline of the element (or the + bottom, if the element doesn't have a baseline) with the baseline of + the parent + + \value VAlignSub subscript the element + + \value VAlignSuper superscript the element + +*/ + + +/*! + Sets the vertical alignment to \a valign. Possible values are + VAlignBaseline, VAlignSub and VAlignSuper. + + The vertical alignment property is not inherited. + + \sa verticalAlignment() + */ +void QStyleSheetItem::setVerticalAlignment( VerticalAlignment valign ) +{ + d->valign = valign; +} + + +/*! + Returns TRUE if the style sets an italic font; otherwise returns FALSE. + + \sa setFontItalic(), definesFontItalic() + */ +bool QStyleSheetItem::fontItalic() const +{ + return d->fontitalic > 0; +} + +/*! + If \a italic is TRUE sets italic for the style; otherwise sets + upright. + + \sa fontItalic(), definesFontItalic() + */ +void QStyleSheetItem::setFontItalic(bool italic) +{ + d->fontitalic = italic?1:0; +} + +/*! + Returns whether the style defines a font shape. A style + does not define any shape until setFontItalic() is called. + + \sa setFontItalic(), fontItalic() + */ +bool QStyleSheetItem::definesFontItalic() const +{ + return d->fontitalic != Undefined; +} + +/*! + Returns TRUE if the style sets an underlined font; otherwise returns FALSE. + + \sa setFontUnderline(), definesFontUnderline() + */ +bool QStyleSheetItem::fontUnderline() const +{ + return d->fontunderline > 0; +} + +/*! + If \a underline is TRUE sets underline for the style; otherwise sets + no underline. + + \sa fontUnderline(), definesFontUnderline() + */ +void QStyleSheetItem::setFontUnderline(bool underline) +{ + d->fontunderline = underline?1:0; +} + +/*! + Returns whether the style defines a setting for the underline + property of the font. A style does not define this until + setFontUnderline() is called. + + \sa setFontUnderline(), fontUnderline() */ +bool QStyleSheetItem::definesFontUnderline() const +{ + return d->fontunderline != Undefined; +} + + +/*! + Returns the font weight setting of the style. This is either a + valid QFont::Weight or the value QStyleSheetItem::Undefined. + + \sa setFontWeight(), QFont + */ +int QStyleSheetItem::fontWeight() const +{ + return d->fontweight; +} + +/*! + Sets the font weight setting of the style to \a w. Valid values are + those defined by QFont::Weight. + + \sa QFont, fontWeight() + */ +void QStyleSheetItem::setFontWeight(int w) +{ + d->fontweight = w; +} + +/*! + Returns the logical font size setting of the style. This is either a valid + size between 1 and 7 or QStyleSheetItem::Undefined. + + \sa setLogicalFontSize(), setLogicalFontSizeStep(), QFont::pointSize(), QFont::setPointSize() + */ +int QStyleSheetItem::logicalFontSize() const +{ + return d->fontsizelog; +} + + +/*! + Sets the logical font size setting of the style to \a s. + Valid logical sizes are 1 to 7. + + \sa logicalFontSize(), QFont::pointSize(), QFont::setPointSize() + */ +void QStyleSheetItem::setLogicalFontSize(int s) +{ + d->fontsizelog = s; +} + +/*! + Returns the logical font size step of this style. + + The default is 0. Tags such as \c big define \c +1; \c small defines + \c -1. + + \sa setLogicalFontSizeStep() + */ +int QStyleSheetItem::logicalFontSizeStep() const +{ + return d->fontsizestep; +} + +/*! + Sets the logical font size step of this style to \a s. + + \sa logicalFontSizeStep() + */ +void QStyleSheetItem::setLogicalFontSizeStep( int s ) +{ + d->fontsizestep = s; +} + + + +/*! + Sets the font size setting of the style to \a s points. + + \sa fontSize(), QFont::pointSize(), QFont::setPointSize() + */ +void QStyleSheetItem::setFontSize(int s) +{ + d->fontsize = s; +} + +/*! + Returns the font size setting of the style. This is either a valid + point size or QStyleSheetItem::Undefined. + + \sa setFontSize(), QFont::pointSize(), QFont::setPointSize() + */ +int QStyleSheetItem::fontSize() const +{ + return d->fontsize; +} + + +/*! + Returns the font family setting of the style. This is either a valid + font family or QString::null if no family has been set. + + \sa setFontFamily(), QFont::family(), QFont::setFamily() + */ +QString QStyleSheetItem::fontFamily() const +{ + return d->fontfamily; +} + +/*! + Sets the font family setting of the style to \a fam. + + \sa fontFamily(), QFont::family(), QFont::setFamily() + */ +void QStyleSheetItem::setFontFamily( const QString& fam) +{ + d->fontfamily = fam; +} + + +/*!\obsolete + Returns the number of columns for this style. + + \sa setNumberOfColumns(), displayMode(), setDisplayMode() + + */ +int QStyleSheetItem::numberOfColumns() const +{ + return d->ncolumns; +} + + +/*!\obsolete + Sets the number of columns for this style. Elements in the style + are divided into columns. + + This makes sense only if the style uses a block display mode + (see QStyleSheetItem::DisplayMode). + + \sa numberOfColumns() + */ +void QStyleSheetItem::setNumberOfColumns(int ncols) +{ + if (ncols > 0) + d->ncolumns = ncols; +} + + +/*! + Returns the text color of this style or an invalid color + if no color has been set. + + \sa setColor() QColor::isValid() + */ +QColor QStyleSheetItem::color() const +{ + return d->col; +} + +/*! + Sets the text color of this style to \a c. + + \sa color() + */ +void QStyleSheetItem::setColor( const QColor &c) +{ + d->col = c; +} + +/*! + Returns whether this style is an anchor. + + \sa setAnchor() + */ +bool QStyleSheetItem::isAnchor() const +{ + return d->anchor; +} + +/*! + If \a anc is TRUE sets this style to be an anchor (hypertext link); + otherwise sets it to not be an anchor. Elements in this style have + connections to other documents or anchors. + + \sa isAnchor() + */ +void QStyleSheetItem::setAnchor(bool anc) +{ + d->anchor = anc; +} + + +/*! + Returns the whitespace mode. + + \sa setWhiteSpaceMode() WhiteSpaceMode + */ +QStyleSheetItem::WhiteSpaceMode QStyleSheetItem::whiteSpaceMode() const +{ + return d->whitespacemode; +} + +/*! + Sets the whitespace mode to \a m. + \sa WhiteSpaceMode + */ +void QStyleSheetItem::setWhiteSpaceMode(WhiteSpaceMode m) +{ + d->whitespacemode = m; +} + + +/*! + Returns the width of margin \a m in pixels. + + The margin, \a m, can be \c MarginLeft, \c MarginRight, + \c MarginTop, \c MarginBottom, \c MarginAll, \c MarginVertical or \c + MarginHorizontal. + + \sa setMargin() Margin + */ +int QStyleSheetItem::margin(Margin m) const +{ + return d->margin[m]; +} + + +/*! + Sets the width of margin \a m to \a v pixels. + + The margin, \a m, can be \c MarginLeft, \c MarginRight, + \c MarginTop, \c MarginBottom, \c MarginAll, \c MarginVertical or \c + MarginHorizontal. The value \a v must be >= 0. + + \sa margin() + */ +void QStyleSheetItem::setMargin(Margin m, int v) +{ + if (m == MarginAll ) { + d->margin[0] = v; + d->margin[1] = v; + d->margin[2] = v; + d->margin[3] = v; + d->margin[4] = v; + } else if (m == MarginVertical ) { + d->margin[MarginTop] = v; + d->margin[MarginBottom] = v; + } else if (m == MarginHorizontal ) { + d->margin[MarginLeft] = v; + d->margin[MarginRight] = v; + } else { + d->margin[m] = v; + } +} + + +/*! + Returns the list style of the style. + + \sa setListStyle() ListStyle + */ +QStyleSheetItem::ListStyle QStyleSheetItem::listStyle() const +{ + return d->list; +} + +/*! \enum QStyleSheetItem::ListStyle + + This enum type defines how the items in a list are prefixed when + displayed. The currently defined values are: + + \value ListDisc a filled circle (i.e. a bullet) + \value ListCircle an unfilled circle + \value ListSquare a filled square + \value ListDecimal an integer in base 10: \e 1, \e 2, \e 3, ... + \value ListLowerAlpha a lowercase letter: \e a, \e b, \e c, ... + \value ListUpperAlpha an uppercase letter: \e A, \e B, \e C, ... +*/ +/*! + Sets the list style of the style to \a s. + + This is used by nested elements that have a display mode of + \c DisplayListItem. + + \sa listStyle() DisplayMode ListStyle + */ +void QStyleSheetItem::setListStyle(ListStyle s) +{ + d->list=s; +} + + +/*! Returns a space-separated list of names of styles that may + contain elements of this style. If nothing has been set, contexts() + returns an empty string, which indicates that this style can be + nested everywhere. + + \sa setContexts() + */ +QString QStyleSheetItem::contexts() const +{ + return d->contxt; +} + +/*! + Sets a space-separated list of names of styles that may contain + elements of this style. If \a c is empty, the style can be nested + everywhere. + + \sa contexts() + */ +void QStyleSheetItem::setContexts( const QString& c) +{ + d->contxt = QChar(' ') + c + QChar(' '); +} + +/*! + Returns TRUE if this style can be nested into an element + of style \a s; otherwise returns FALSE. + + \sa contexts(), setContexts() + */ +bool QStyleSheetItem::allowedInContext( const QStyleSheetItem* s) const +{ + if ( d->contxt.isEmpty() ) + return TRUE; + return d->contxt.find( QChar(' ')+s->name()+QChar(' ')) != -1; +} + + +/*! + Returns TRUE if this style has self-nesting enabled; otherwise + returns FALSE. + + \sa setSelfNesting() + */ +bool QStyleSheetItem::selfNesting() const +{ + return d->selfnest; +} + +/*! + Sets the self-nesting property for this style to \a nesting. + + In order to support "dirty" HTML, paragraphs \c{<p>} and list items + \c{<li>} are not self-nesting. This means that starting a new + paragraph or list item automatically closes the previous one. + + \sa selfNesting() + */ +void QStyleSheetItem::setSelfNesting( bool nesting ) +{ + d->selfnest = nesting; +} + +/*! Sets the linespacing to be \a ls pixels */ + +void QStyleSheetItem::setLineSpacing( int ls ) +{ + d->lineSpacing = ls; +} + +/*! Returns the linespacing */ + +int QStyleSheetItem::lineSpacing() const +{ + return d->lineSpacing; +} + +//************************************************************************ + + + + +//************************************************************************ + + +/*! + \class QStyleSheet qstylesheet.h + \ingroup text + \brief The QStyleSheet class is a collection of styles for rich text + rendering and a generator of tags. + + \ingroup graphics + \ingroup helpsystem + + By creating QStyleSheetItem objects for a style sheet you build a + definition of a set of tags. This definition will be used by the + internal rich text rendering system to parse and display text + documents to which the style sheet applies. Rich text is normally + visualized in a QTextView or a QTextBrowser. However, QLabel, + QWhatsThis and QMessageBox also support it, and other classes are + likely to follow. With QSimpleRichText it is possible to use the + rich text renderer for custom widgets as well. + + The default QStyleSheet object has the following style bindings, + sorted by structuring bindings, anchors, character style bindings + (i.e. inline styles), special elements such as horizontal lines or + images, and other tags. In addition, rich text supports simple HTML + tables. + + The structuring tags are + \list + \i \c{<qt>}...\c{</qt>} + - A Qt rich text document. It understands the following attributes: + \list + \i title + - The caption of the document. This attribute is easily accessible with + QTextView::documentTitle(). + \i type + - The type of the document. The default type is \c page . It + indicates that the document is displayed in a page of its + own. Another style is \c detail, which can be used to + explain certain expressions in more detail in a few + sentences. The QTextBrowser will then keep the current page + and display the new document in a small popup similar to + QWhatsThis. Note that links will not work in documents with + \c{<qt type="detail">...</qt>}. + \i bgcolor + - The background color, for example \c bgcolor="yellow" or \c + bgcolor="#0000FF". + \i background + - The background pixmap, for example \c + background="granit.xpm". The pixmap name will be resolved by + a QMimeSourceFactory(). + \i text + - The default text color, for example \c text="red". + \i link + - The link color, for example \c link="green". + \endlist + \i \c{<h1>...</h1>} + - A top-level heading. + \i \c{<h2>...</h2>} + - A sublevel heading. + \i \c{<h3>...</h3>} + - A sub-sublevel heading. + \i \c{<p>...</p>} + - A left-aligned paragraph. Adjust the alignment with + the \c align attribute. Possible values are + \c left, \c right and \c center. + \i \c{<center>...</center>} + - A centered paragraph. + \i \c{<blockquote>...</blockquote>} + - An indented paragraph that is useful for quotes. + \i \c{<ul>...</ul>} + - An unordered list. You can also pass a type argument to + define the bullet style. The default is \c type=disc; other + types are \c circle and \c square. + \i \c{<ol>...</ol>} + - An ordered list. You can also pass a type argument to define + the enumeration label style. The default is \c type="1"; other + types are \c "a" and \c "A". + \i <tt><li></tt>...<tt></li></tt> + - A list item. This tag can be used only within the context of + \c ol or \c ul. + \i \c{<pre>...</pre>} + - For larger chunks of code. Whitespaces in the contents are preserved. + For small bits of code use the inline-style \c code. + \endlist + + Anchors and links are done with a single tag: + \list + \i \c{<a>...</a>} + - An anchor or link. The reference target is defined in the \c + href attribute of the tag as in \c{<a + href="target.qml">...</a>}. You can also specify an + additional anchor within the specified target document, for + example \c{<a href="target.qml#123">...</a>}. If \c a is + meant to be an anchor, the reference source is given in the + \c name attribute. + \endlist + + The default character style bindings are + \list + \i \c{<em>...</em>} + - Emphasized. By default this is the same as + \c{<i>...</i>} (italic). + \i \c{<strong>...</strong>} + - Strong. By default this is the same as + \c{<b>...</b>} (bold). + \i \c{<i>...</i>} + - Italic font style. + \i \c{<b>...</b>} + - Bold font style. + \i \c{<u>...</u>} + - Underlined font style. + \i \c{<big>...</big>} + - A larger font size. + \i \c{<small>...</small>} + - A smaller font size. + \i \c{<code>...</code>} + - Indicates code. By default this is the same as + \c{<tt>...</tt>} (typewriter). For + larger junks of code use the block-tag \c pre. + \i \c{<tt>...</tt>} + - Typewriter font style. + \i \c{<font>...</font>} + - Customizes the font size, family and text color. The tag understands + the following attributes: + \list + \i color + - The text color, for example \c color="red" or \c color="#FF0000". + \i size + - The logical size of the font. Logical sizes 1 to 7 are supported. + The value may either be absolute (for example, + \c size=3) or relative (\c size=-2). In the latter case the sizes + are simply added. + \i face + - The family of the font, for example \c face=times. + \endlist + \endlist + + Special elements are: + \list + \i \c{<img>} + - An image. The image name for the mime source + factory is given in the source attribute, for example + \c{<img src="qt.xpm">} + The image tag also understands the attributes \c width and \c + height that determine the size of the image. If the pixmap + does not fit the specified size it will be scaled + automatically (by using QImage::smoothScale()). + + The \c align attribute determines where the image is + placed. By default, an image is placed inline just like a + normal character. Specify \c left or \c right to place the + image at the respective side. + \i \c{<hr>} + - A horizonal line. + \i \c{<br>} + - A line break. + \endlist + + Another tag not in any of the above cathegories is + \list + \i \c{<nobr>...</nobr>} + - No break. Prevents word wrap. + \endlist + + In addition, rich text supports simple HTML tables. A table consists + of one or more rows each of which contains one or more cells. Cells + are either data cells or header cells, depending on their + content. Cells which span rows and columns are supported. + + \list + \i \c{<table>...</table>} + - A table. Tables support the following attributes: + \list + \i bgcolor + - The background color. + \i width + - The table width. This is either an absolute pixel width or a relative + percentage of the table's width, for example \c width=80%. + \i border + - The width of the table border. The default is 0 (= no border). + \i cellspacing + - Additional space around the table cells. The default is 2. + \i cellpadding + - Additional space around the contents of table cells. The default is 1. + \endlist + \i \c{<tr>...</tr>} + - A table row. This is only valid within a \c table. Rows support + the following attribute: + \list + \i bgcolor + - The background color. + \endlist + \i \c{<th>...</th>} + - A table header cell. Similar to \c td, but defaults to center alignment + and a bold font. + \i \c{<td>...</td>} + - A table data cell. This is only valid within a \c tr. Cells + support the following attributes: + \list + \i bgcolor + - The background color. + \i width + - The cell width. This is either an absolute pixel width or a relative + percentage of table's width, for example \c width=50%. + \i colspan + - Specifies how many columns this cell spans. The default is 1. + \i rowspan + - Specifies how many rows this cell spans. The default is 1. + \i align + - Alignment; possible values are \c left, \c right, and \c center. The + default is left. + \endlist + \endlist +*/ + +/*! + Creates a style sheet with parent \a parent and name \a name. Like + any QObject it will be deleted when its parent is + destroyed (if the child still exists). + + By default the style sheet has the tag definitions defined above. +*/ +QStyleSheet::QStyleSheet( QObject *parent, const char *name ) + : QObject( parent, name ) +{ + init(); +} + +/*! + Destroys the style sheet. All styles inserted into the style sheet + will be deleted. +*/ +QStyleSheet::~QStyleSheet() +{ +} + +/*! + \internal + Initialized the style sheet to the basic Qt style. +*/ +void QStyleSheet::init() +{ + styles.setAutoDelete( TRUE ); + + nullstyle = new QStyleSheetItem( this, + QString::fromLatin1("") ); + + QStyleSheetItem* style; + + style = new QStyleSheetItem( this, "qml" ); // compatibility + style->setDisplayMode( QStyleSheetItem::DisplayBlock ); + + style = new QStyleSheetItem( this, QString::fromLatin1("qt") ); + style->setDisplayMode( QStyleSheetItem::DisplayBlock ); + //style->setMargin( QStyleSheetItem::MarginAll, 4 ); + + style = new QStyleSheetItem( this, QString::fromLatin1("a") ); + style->setAnchor( TRUE ); + + style = new QStyleSheetItem( this, QString::fromLatin1("em") ); + style->setFontItalic( TRUE ); + + style = new QStyleSheetItem( this, QString::fromLatin1("i") ); + style->setFontItalic( TRUE ); + + style = new QStyleSheetItem( this, QString::fromLatin1("big") ); + style->setLogicalFontSizeStep( 1 ); + style = new QStyleSheetItem( this, QString::fromLatin1("large") ); // compatibility + style->setLogicalFontSizeStep( 1 ); + + style = new QStyleSheetItem( this, QString::fromLatin1("small") ); + style->setLogicalFontSizeStep( -1 ); + + style = new QStyleSheetItem( this, QString::fromLatin1("strong") ); + style->setFontWeight( QFont::Bold); + + style = new QStyleSheetItem( this, QString::fromLatin1("b") ); + style->setFontWeight( QFont::Bold); + + style = new QStyleSheetItem( this, QString::fromLatin1("h1") ); + style->setFontWeight( QFont::Bold); + style->setLogicalFontSize(6); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style-> setMargin(QStyleSheetItem::MarginTop, 12); + style-> setMargin(QStyleSheetItem::MarginBottom, 6); + + style = new QStyleSheetItem( this, QString::fromLatin1("h2") ); + style->setFontWeight( QFont::Bold); + style->setLogicalFontSize(5); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style-> setMargin(QStyleSheetItem::MarginTop, 10); + style-> setMargin(QStyleSheetItem::MarginBottom, 5); + + style = new QStyleSheetItem( this, QString::fromLatin1("h3") ); + style->setFontWeight( QFont::Bold); + style->setLogicalFontSize(4); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style-> setMargin(QStyleSheetItem::MarginTop, 8); + style-> setMargin(QStyleSheetItem::MarginBottom, 4); + + style = new QStyleSheetItem( this, QString::fromLatin1("h4") ); + style->setFontWeight( QFont::Bold); + style->setLogicalFontSize(3); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style-> setMargin(QStyleSheetItem::MarginTop, 8); + style-> setMargin(QStyleSheetItem::MarginBottom, 4); + + style = new QStyleSheetItem( this, QString::fromLatin1("h5") ); + style->setFontWeight( QFont::Bold); + style->setLogicalFontSize(2); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style-> setMargin(QStyleSheetItem::MarginTop, 8); + style-> setMargin(QStyleSheetItem::MarginBottom, 4); + + style = new QStyleSheetItem( this, QString::fromLatin1("p") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style-> setMargin(QStyleSheetItem::MarginVertical, 8); + style->setSelfNesting( FALSE ); + + style = new QStyleSheetItem( this, QString::fromLatin1("center") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setAlignment( AlignCenter ); + + style = new QStyleSheetItem( this, QString::fromLatin1("twocolumn") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setNumberOfColumns( 2 ); + + style = new QStyleSheetItem( this, QString::fromLatin1("multicol") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + (void) new QStyleSheetItem( this, QString::fromLatin1("font") ); + + style = new QStyleSheetItem( this, QString::fromLatin1("ul") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style-> setMargin(QStyleSheetItem::MarginVertical, 4); + + style = new QStyleSheetItem( this, QString::fromLatin1("ol") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setListStyle( QStyleSheetItem::ListDecimal ); + style-> setMargin(QStyleSheetItem::MarginVertical, 4); + + style = new QStyleSheetItem( this, QString::fromLatin1("li") ); + style->setDisplayMode(QStyleSheetItem::DisplayListItem); + style->setSelfNesting( FALSE ); + style->setContexts(QString::fromLatin1("ol ul")); + style-> setMargin(QStyleSheetItem::MarginVertical, 4); + + style = new QStyleSheetItem( this, QString::fromLatin1("code") ); + style->setFontFamily( QString::fromLatin1("courier") ); + + style = new QStyleSheetItem( this, QString::fromLatin1("tt") ); + style->setFontFamily( QString::fromLatin1("courier") ); + + new QStyleSheetItem(this, QString::fromLatin1("img")); + new QStyleSheetItem(this, QString::fromLatin1("br")); + new QStyleSheetItem(this, QString::fromLatin1("hr")); + style = new QStyleSheetItem(this, QString::fromLatin1("sub")); + style->setVerticalAlignment( QStyleSheetItem::VAlignSub ); + style = new QStyleSheetItem(this, QString::fromLatin1("sup")); + style->setVerticalAlignment( QStyleSheetItem::VAlignSuper ); + + style = new QStyleSheetItem( this, QString::fromLatin1("pre") ); + style->setFontFamily( QString::fromLatin1("courier") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setWhiteSpaceMode(QStyleSheetItem::WhiteSpacePre); + + style = new QStyleSheetItem( this, QString::fromLatin1("blockquote") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setMargin(QStyleSheetItem::MarginHorizontal, 40 ); + + style = new QStyleSheetItem( this, QString::fromLatin1("head") ); + style->setDisplayMode(QStyleSheetItem::DisplayNone); + style = new QStyleSheetItem( this, QString::fromLatin1("div") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock) ; + style = new QStyleSheetItem( this, QString::fromLatin1("dl") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style = new QStyleSheetItem( this, QString::fromLatin1("dt") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setContexts(QString::fromLatin1("dl") ); + style = new QStyleSheetItem( this, QString::fromLatin1("dd") ); + style->setDisplayMode(QStyleSheetItem::DisplayBlock); + style->setMargin(QStyleSheetItem::MarginLeft, 30); + style->setContexts(QString::fromLatin1("dt dl") ); + style = new QStyleSheetItem( this, QString::fromLatin1("u") ); + style->setFontUnderline( TRUE); + style = new QStyleSheetItem( this, QString::fromLatin1("nobr") ); + style->setWhiteSpaceMode( QStyleSheetItem::WhiteSpaceNoWrap ); + style = new QStyleSheetItem( this, QString::fromLatin1("wsp") ); // qt extension for QTextEdit + style->setWhiteSpaceMode( (QStyleSheetItem::WhiteSpaceMode) 3 ); // WhiteSpaceModeNoCompression + + // tables + style = new QStyleSheetItem( this, QString::fromLatin1("table") ); + style = new QStyleSheetItem( this, QString::fromLatin1("tr") ); + style->setContexts(QString::fromLatin1("table")); + style = new QStyleSheetItem( this, QString::fromLatin1("td") ); + style->setContexts(QString::fromLatin1("tr")); + style = new QStyleSheetItem( this, QString::fromLatin1("th") ); + style->setFontWeight( QFont::Bold ); + style->setAlignment( Qt::AlignCenter ); + style->setContexts(QString::fromLatin1("tr")); + + style = new QStyleSheetItem( this, QString::fromLatin1("html") ); +} + + + +static QStyleSheet* defaultsheet = 0; +static QSingleCleanupHandler<QStyleSheet> qt_cleanup_stylesheet; + +/*! + Returns the application-wide default style sheet. This style sheet is + used by rich text rendering classes such as QSimpleRichText, + QWhatsThis and QMessageBox to define the rendering style and + available tags within rich text documents. It serves also as initial + style sheet for the more complex render widgets QTextEdit and + QTextBrowser. + + \sa setDefaultSheet() +*/ +QStyleSheet* QStyleSheet::defaultSheet() +{ + if (!defaultsheet) { + defaultsheet = new QStyleSheet(); + qt_cleanup_stylesheet.set( &defaultsheet ); + } + return defaultsheet; +} + +/*! + Sets the application-wide default style sheet to \a sheet, deleting + any style sheet previously set. The ownership is transferred to + QStyleSheet. + + \sa defaultSheet() +*/ +void QStyleSheet::setDefaultSheet( QStyleSheet* sheet) +{ + if ( defaultsheet != sheet ) { + if ( defaultsheet ) + qt_cleanup_stylesheet.reset(); + delete defaultsheet; + } + defaultsheet = sheet; + if ( defaultsheet ) + qt_cleanup_stylesheet.set( &defaultsheet ); +} + +/*!\internal + Inserts \a style. Any tags generated after this time will be + bound to this style. Note that \a style becomes owned by the + style sheet and will be deleted when the style sheet is destroyed. +*/ +void QStyleSheet::insert( QStyleSheetItem* style ) +{ + styles.insert(style->name(), style); +} + + +/*! + Returns the style with name \a name or 0 if there is no such style. + */ +QStyleSheetItem* QStyleSheet::item( const QString& name) +{ + if ( name.isNull() ) + return 0; + return styles[name]; +} + +/*! + \overload + Returns the style with name \a name or 0 if there is no such style (const version) + */ +const QStyleSheetItem* QStyleSheet::item( const QString& name) const +{ + if ( name.isNull() ) + return 0; + return styles[name]; +} + + +/*! + \preliminary + Generates an internal object for the tag called \a name, given the + attributes \a attr, and using additional information provided + by the mime source factory \a factory. + + \a context is the optional context of the document, i.e. the path to + look for relative links. This becomes important if the text contains + relative references, for example within image tags. QSimpleRichText + always uses the default mime source factory (see + \l{QMimeSourceFactory::defaultFactory()}) to resolve these references. + The context will then be used to calculate the absolute path. See + QMimeSourceFactory::makeAbsolute() for details. + + \a emptyTag and \a doc are for internal use only. + + This function should not (yet) be used in application code. +*/ +QTextCustomItem* QStyleSheet::tag( const QString& name, + const QMap<QString, QString> &attr, + const QString& context, + const QMimeSourceFactory& factory, + bool /*emptyTag */, QTextDocument *doc ) const +{ + static QString s_img = QString::fromLatin1("img"); + static QString s_hr = QString::fromLatin1("hr"); + + const QStyleSheetItem* style = item( name ); + // first some known tags + if ( !style ) + return 0; + if ( style->name() == s_img ) + return new QTextImage( doc, attr, context, (QMimeSourceFactory&)factory ); + if ( style->name() == s_hr ) + return new QTextHorizontalLine( doc, attr, context, (QMimeSourceFactory&)factory ); + return 0; +} + + +/*! + Auxiliary function. Converts the plain text string \a plain to a + rich text formatted paragraph while preserving its look. + + \a mode defines the whitespace mode. Possible values are \c + QStyleSheetItem::WhiteSpacePre (no wrapping, all whitespaces + preserved) and \c QStyleSheetItem::WhiteSpaceNormal (wrapping, + simplified whitespaces). + + \sa escape() + */ +QString QStyleSheet::convertFromPlainText( const QString& plain, QStyleSheetItem::WhiteSpaceMode mode ) +{ + int col = 0; + QString rich; + rich += "<p>"; + for ( int i = 0; i < int(plain.length()); ++i ) { + if ( plain[i] == '\n' ){ + if ( col == 1 ) + rich += "<p></p>"; + else + rich += "<br>"; + col = 0; + } + else if ( mode == QStyleSheetItem::WhiteSpacePre && plain[i] == '\t' ){ + rich += 0x00a0U; + while ( col % 4 ) { + rich += 0x00a0U; + ++col; + } + } + else if ( mode == QStyleSheetItem::WhiteSpacePre && plain[i].isSpace() ) + rich += 0x00a0U; + else if ( plain[i] == '<' ) + rich +="<"; + else if ( plain[i] == '>' ) + rich +=">"; + else if ( plain[i] == '&' ) + rich +="&"; + else + rich += plain[i]; + ++col; + } + rich += "</p>"; + return rich; +} + +/*! + Auxiliary function. Converts the plain text string \a plain to a + rich text formatted string with any HTML meta-characters escaped. + + \sa convertFromPlainText() + */ +QString QStyleSheet::escape( const QString& plain) +{ + QString rich; + for ( int i = 0; i < int(plain.length()); ++i ) { + if ( plain[i] == '<' ) + rich +="<"; + else if ( plain[i] == '>' ) + rich +=">"; + else if ( plain[i] == '&' ) + rich +="&"; + else + rich += plain[i]; + } + return rich; +} + +// Must doc this enum somewhere, and it is logically related to QStyleSheet + +/*! + \enum Qt::TextFormat + + This enum is used in widgets that can display both plain text and + rich text, e.g. QLabel. It is used for deciding whether a text + string should be interpreted as one or the other. This is + normally done by passing one of the enum values to a setTextFormat() + function. + + \value PlainText The text string is interpreted as a plain text string. + + \value RichText The text string is interpreted as a rich text string + using the current QStyleSheet::defaultSheet(). + + \value AutoText The text string is interpreted as for \c RichText if + QStyleSheet::mightBeRichText() returns TRUE, otherwise as for \c + PlainText. +*/ + +/*! + Returns TRUE if the string \a text is likely to be rich text; + otherwise returns FALSE. + + Note: The function uses a fast and therefore simple heuristic. It + mainly checks whether there is something that looks like a tag + before the first line break. Although the result may be correct for + most common cases, there is no guarantee. +*/ +bool QStyleSheet::mightBeRichText( const QString& text) +{ + if ( text.isEmpty() ) + return FALSE; + if ( text.left(5).lower() == "<!doc" ) + return TRUE; + int open = 0; + while ( open < int(text.length()) && text[open] != '<' + && text[open] != '\n' && text[open] != '&') + ++open; + if ( text[open] == '&' ) { + if ( text.mid(open+1,3) == "lt;" ) + return TRUE; // support desperate attempt of user to see <...> + } else if ( text[open] == '<' ) { + int close = text.find('>', open); + if ( close > -1 ) { + QString tag; + for (int i = open+1; i < close; ++i) { + if ( text[i].isDigit() || text[i].isLetter() ) + tag += text[i]; + else if ( !tag.isEmpty() && text[i].isSpace() ) + break; + else if ( !text[i].isSpace() && (!tag.isEmpty() || text[i] != '!' ) ) + return FALSE; // that's not a tag + } + return defaultSheet()->item( tag.lower() ) != 0; + } + } + return FALSE; +} + + +/*! \fn void QStyleSheet::error( const QString& msg) const + + This virtual function is called when an error occurs when + processing rich text. Reimplement it if you need to catch + error messages. + + Errors might occur if some rich text strings contain tags that are + not understood by the stylesheet, if some tags are nested incorrectly, or + if tags are not closed properly. + + \a msg is the error message. +*/ +void QStyleSheet::error( const QString& ) const +{ +} + + +/*! + Scales the font \a font to the appropriate physical point size + corresponding to the logical font size \a logicalSize. + + When calling this function, \a font has a point size corresponding to + the logical font size 3. + + Logical font sizes range from 1 to 7, with 1 being the smallest. + + \sa QStyleSheetItem::logicalFontSize(), + QStyleSheetItem::logicalFontSizeStep(), QFont::setPointSize() + */ +void QStyleSheet::scaleFont( QFont& font, int logicalSize ) const +{ + if ( logicalSize < 1 ) + logicalSize = 1; + if ( logicalSize > 7 ) + logicalSize = 7; + int baseSize = font.pointSize(); + bool pixel = FALSE; + if ( baseSize == -1 ) { + baseSize = font.pixelSize(); + pixel = TRUE; + } + int s; + switch ( logicalSize ) { + case 1: + s = baseSize/2; + break; + case 2: + s = (8 * baseSize) / 10; + break; + case 4: + s = (12 * baseSize) / 10; + break; + case 5: + s = (15 * baseSize) / 10; + break; + case 6: + s = 2 * baseSize; + break; + case 7: + s = (24 * baseSize) / 10; + break; + default: + s = baseSize; + } + if ( pixel ) + font.setPixelSize( s ); + else + font.setPointSize( s ); +} |