KateRenderer Class Reference

#include <katerenderer.h>

Public Types
enum	PaintTextLineFlag { SkipDrawFirstInvisibleLineUnderlined = 0x1 , SkipDrawLineSelection = 0x2 }
typedef QFlags< PaintTextLineFlag >	PaintTextLineFlags

Public Member Functions
	KateRenderer (const KateRenderer &)=delete
	KateRenderer (KTextEditor::DocumentPrivate *doc, Kate::TextFolding &folding, KTextEditor::ViewPrivate *view=nullptr)
const AttributePtr &	attribute (uint pos) const
KTextEditor::caretStyles	caretStyle () const
KateRendererConfig *	config () const
const QFont &	currentFont () const
const QFontMetricsF &	currentFontMetrics () const
int	cursorToX (const KateTextLayout &range, const KTextEditor::Cursor pos, bool returnPastLine=false) const
int	cursorToX (const KateTextLayout &range, int col, bool returnPastLine=false) const
QList< QTextLayout::FormatRange >	decorationsForLine (const Kate::TextLine &textLine, int line, bool selectionsOnly=false) const
void	decreaseFontSizes (qreal step=1.0) const
KTextEditor::DocumentPrivate *	doc () const
uint	documentHeight () const
bool	drawCaret () const
Kate::TextFolding &	folding () const
uint	fontHeight () const
bool	getSelectionBounds (int line, int lineLength, int &start, int &end) const
void	increaseFontSizes (qreal step=1.0) const
bool	isPrinterFriendly () const
void	layoutLine (KateLineLayout *line, int maxwidth=-1, bool cacheLayout=false) const
int	lineHeight () const
KateRenderer &	operator= (const KateRenderer &)=delete
void	paintSelection (QPaintDevice *d, int startLine, int xStart, int endLine, int xEnd, int viewWidth, qreal scale=1.0)
void	paintTextBackground (QPainter &paint, KateLineLayout *layout, const QList< QTextLayout::FormatRange > &selRanges, const QBrush &br, int xStart) const
void	paintTextLine (QPainter &paint, KateLineLayout *range, int xStart, int xEnd, const QRectF &textClipRect=QRectF(), const KTextEditor::Cursor *cursor=nullptr, PaintTextLineFlags flags=PaintTextLineFlags())
void	paintTextLineBackground (QPainter &paint, KateLineLayout *layout, int currentViewLine, int xStart, int xEnd)
void	resetFontSizes () const
void	setCaretOverrideColor (const QColor &color)
void	setCaretStyle (KTextEditor::caretStyles style)
void	setDrawCaret (bool drawCaret)
void	setIndentWidth (int indentWidth)
void	setPrinterFriendly (bool printerFriendly)
void	setShowIndentLines (bool showLines)
void	setShowNonPrintableSpaces (const bool showNonPrintableSpaces)
void	setShowSelections (bool showSelections)
void	setShowSpaces (KateDocumentConfig::WhitespaceRendering showSpaces)
void	setShowTabs (bool showTabs)
void	setTabWidth (int tabWidth)
bool	showIndentLines () const
bool	showNonPrintableSpaces () const
bool	showSelections () const
KateDocumentConfig::WhitespaceRendering	showSpaces () const
bool	showTabs () const
qreal	spaceWidth () const
AttributePtr	specificAttribute (int context) const
void	updateAttributes ()
void	updateConfig ()
void	updateMarkerSize ()
KTextEditor::ViewPrivate *	view () const
KTextEditor::Cursor	xToCursor (const KateTextLayout &range, int x, bool returnPastLine=false) const

Static Public Member Functions
static bool	isLineRightToLeft (QStringView str)

Detailed Description

Handles all of the work of rendering the text (used for the views and printing)

Definition at line 55 of file katerenderer.h.

Member Typedef Documentation

PaintTextLineFlags

QFlags< PaintTextLineFlag > KateRenderer::PaintTextLineFlags

Definition at line 344 of file katerenderer.h.

Member Enumeration Documentation

PaintTextLineFlag

enum KateRenderer::PaintTextLineFlag

Flags to customize the paintTextLine function behavior.

Enumerator
SkipDrawFirstInvisibleLineUnderlined	Skip drawing the dashed underline at the start of a folded block of text?
SkipDrawLineSelection	Skip drawing the line selection This is useful when we are drawing the draggable pixmap for drag event.

Definition at line 333 of file katerenderer.h.

Constructor & Destructor Documentation

KateRenderer()

KateRenderer::KateRenderer ( KTextEditor::DocumentPrivate * doc, Kate::TextFolding & folding, KTextEditor::ViewPrivate * view = nullptr )

explicit

Style of Caret.

The caret is displayed as a vertical bar (Line), a filled box (Block), a horizontal bar (Underline), or a half-height filled box (Half). The default is Line.

Line           Block          Underline           Half

_ ######### _ _

__| | #####| |# __| | __| |

/ _' | ##/ _' |# / _' | / _' |

| (_| | #| (#| |# | (_| | #| (#| |

__,_| ##__,_|# __,_| ##__,_|

autotoc_md14

Constructor

Parameters

doc	document to render
folding	folding information
view	view which is output (0 for example for rendering to print)

Definition at line 42 of file katerenderer.cpp.

Member Function Documentation

attribute()

const KTextEditor::Attribute::Ptr & KateRenderer::attribute

(

uint

pos

)

const

This takes an in index, and returns all the attributes for it.

For example, if you have a ktextline, and want the KTextEditor::Attribute for a given position, do:

attribute(myktextline->attribute(position));

Definition at line 73 of file katerenderer.cpp.

caretStyle()

KTextEditor::caretStyles KateRenderer::caretStyle ( ) const

inline

The style of the caret (text cursor) to be painted.

Returns

caretStyle

Definition at line 136 of file katerenderer.h.

config()

KateRendererConfig * KateRenderer::config ( ) const

inline

Definition at line 478 of file katerenderer.h.

currentFont()

const QFont & KateRenderer::currentFont ( ) const

inline

Access currently used font.

Returns

current font

Definition at line 250 of file katerenderer.h.

currentFontMetrics()

const QFontMetricsF & KateRenderer::currentFontMetrics ( ) const

inline

Access currently used font metrics.

Returns

current font metrics

Definition at line 259 of file katerenderer.h.

cursorToX() [1/2]

int KateRenderer::cursorToX	(	const KateTextLayout &	range,
		const KTextEditor::Cursor	pos,
		bool	returnPastLine = false ) const

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

Definition at line 1463 of file katerenderer.cpp.

cursorToX() [2/2]

int KateRenderer::cursorToX	(	const KateTextLayout &	range,
		int	col,
		bool	returnPastLine = false ) const

Returns the x position of cursor col on the line range.

Definition at line 1458 of file katerenderer.cpp.

decorationsForLine()

QList< QTextLayout::FormatRange > KateRenderer::decorationsForLine	(	const Kate::TextLine &	textLine,
		int	line,
		bool	selectionsOnly = false ) const

The ultimate decoration creation function.

Parameters

selectionsOnly

return decorations for selections and/or dynamic highlighting.

Definition at line 436 of file katerenderer.cpp.

decreaseFontSizes()

void KateRenderer::decreaseFontSizes

(

qreal

step = 1.0

)

const

Definition at line 158 of file katerenderer.cpp.

doc()

KTextEditor::DocumentPrivate * KateRenderer::doc ( ) const

inline

Returns the document to which this renderer is bound.

Definition at line 89 of file katerenderer.h.

documentHeight()

uint KateRenderer::documentHeight

(

)

const

Definition at line 1149 of file katerenderer.cpp.

drawCaret()

bool KateRenderer::drawCaret ( ) const

inline

Determine whether the caret (text cursor) will be drawn.

Returns

should it be drawn?

Definition at line 121 of file katerenderer.h.

folding()

Kate::TextFolding & KateRenderer::folding ( ) const

inline

Returns the folding info to which this renderer is bound.

Returns

folding info

Definition at line 98 of file katerenderer.h.

fontHeight()

uint KateRenderer::fontHeight

(

)

const

Definition at line 1144 of file katerenderer.cpp.

getSelectionBounds()

bool KateRenderer::getSelectionBounds	(	int	line,
		int	lineLength,
		int &	start,
		int &	end ) const

Definition at line 1159 of file katerenderer.cpp.

increaseFontSizes()

void KateRenderer::increaseFontSizes

(

qreal

step = 1.0

)

const

Change to a different font (soon to be font set?)

Definition at line 145 of file katerenderer.cpp.

isLineRightToLeft()

bool KateRenderer::isLineRightToLeft ( QStringView str )

static

This is a smaller QString::isRightToLeft().

It's also marked as internal to kate instead of internal to Qt, so we can modify. This method searches for the first strong character in the paragraph and then returns its direction. In case of a line without any strong characters, the direction is forced to be LTR.

Back in KDE 4.1 this method counted chars, which lead to unwanted side effects. (see https://bugs.kde.org/show_bug.cgi?id=178594). As this function is internal the way it work will probably change between releases. Be warned!

Definition at line 1426 of file katerenderer.cpp.

isPrinterFriendly()

bool KateRenderer::isPrinterFriendly

(

)

const

Returns

whether the renderer is configured to paint in a printer-friendly fashion.

Definition at line 167 of file katerenderer.cpp.

layoutLine()

void KateRenderer::layoutLine	(	KateLineLayout *	line,
		int	maxwidth = -1,
		bool	cacheLayout = false ) const

Text width & height calculation functions...

Definition at line 1259 of file katerenderer.cpp.

lineHeight()

int KateRenderer::lineHeight

(

)

const

Definition at line 1154 of file katerenderer.cpp.

paintSelection()

void KateRenderer::paintSelection	(	QPaintDevice *	d,
		int	startLine,
		int	xStart,
		int	endLine,
		int	xEnd,
		int	viewWidth,
		qreal	scale = 1.0 )

Paints a range of text into d.

This function is mainly used to paint the pixmap when dragging text.

Please note that this will not paint the selection background but only the text.

Parameters

d	the paint device
startLine	start line
xStart	start pos on startLine in pixels
endLine	end line
xEnd	end pos on endLine in pixels
scale	the amount of scaling to apply. Default is 1.0, negative values are not supported

Definition at line 1504 of file katerenderer.cpp.

paintTextBackground()

void KateRenderer::paintTextBackground	(	QPainter &	paint,
		KateLineLayout *	layout,
		const QList< QTextLayout::FormatRange > &	selRanges,
		const QBrush &	br,
		int	xStart ) const

Definition at line 616 of file katerenderer.cpp.

paintTextLine()

void KateRenderer::paintTextLine	(	QPainter &	paint,
		KateLineLayout *	range,
		int	xStart,
		int	xEnd,
		const QRectF &	textClipRect = QRectF(),
		const KTextEditor::Cursor *	cursor = nullptr,
		PaintTextLineFlags	flags = PaintTextLineFlags() )

This is the ultimate function to perform painting of a text line.

The text line is painted from the upper limit of (0,0). To move that, apply a transform to your painter.

Parameters

paint	painter to use
range	layout to use in painting this line
textClipRect	clip rect for text to not paint lines outside the visible area.
xStart	starting width in pixels.
xEnd	ending width in pixels.
cursor	position of the caret, if placed on the current line.
flags	flags for customizing the drawing of the line

Definition at line 685 of file katerenderer.cpp.

paintTextLineBackground()

void KateRenderer::paintTextLineBackground	(	QPainter &	paint,
		KateLineLayout *	layout,
		int	currentViewLine,
		int	xStart,
		int	xEnd )

Paint the background of a line.

Split off from the main paintTextLine method to make it smaller. As it's being called only once per line it shouldn't noticably affect performance and it helps readability a LOT.

Parameters

paint	painter to use
layout	layout to use in painting this line
currentViewLine	if one of the view lines is the current line, set this to the index; otherwise -1.
xStart	starting width in pixels.
xEnd	ending width in pixels.

Definition at line 181 of file katerenderer.cpp.

resetFontSizes()

void KateRenderer::resetFontSizes

(

)

const

Definition at line 152 of file katerenderer.cpp.

setCaretOverrideColor()

void KateRenderer::setCaretOverrideColor

(

const QColor &

color

)

Set a brush with which to override drawing of the caret.

Set to QColor() to clear.

Definition at line 1499 of file katerenderer.cpp.

setCaretStyle()

void KateRenderer::setCaretStyle

(

KTextEditor::caretStyles

style

)

Set the style of caret to be painted.

Parameters

style

style to set

Definition at line 96 of file katerenderer.cpp.

setDrawCaret()

void KateRenderer::setDrawCaret

(

bool

drawCaret

)

Set whether the caret (text cursor) will be drawn.

Parameters

drawCaret

should caret be drawn?

Definition at line 91 of file katerenderer.cpp.

setIndentWidth()

void KateRenderer::setIndentWidth

(

int

indentWidth

)

Sets the width of the tab.

Helps performance.

Parameters

indentWidth

new indent width

Definition at line 135 of file katerenderer.cpp.

setPrinterFriendly()

void KateRenderer::setPrinterFriendly

(

bool

printerFriendly

)

Configure this renderer to paint in a printer-friendly fashion.

Sets the other options appropriately if true.

Definition at line 172 of file katerenderer.cpp.

setShowIndentLines()

void KateRenderer::setShowIndentLines

(

bool

showLines

)

Set whether a guide should be painted to help identifying indent lines.

Parameters

showLines

show the indent lines?

Definition at line 126 of file katerenderer.cpp.

setShowNonPrintableSpaces()

void KateRenderer::setShowNonPrintableSpaces

(

const bool

showNonPrintableSpaces

)

Set whether box should be drawn around non-printable spaces.

Definition at line 111 of file katerenderer.cpp.

setShowSelections()

void KateRenderer::setShowSelections

(

bool

showSelections

)

Set whether the view's selections should be shown.

The default is true.

Parameters

showSelections

show the selections?

Definition at line 140 of file katerenderer.cpp.

setShowSpaces()

void KateRenderer::setShowSpaces

(

KateDocumentConfig::WhitespaceRendering

showSpaces

)

Set which spaces should be rendered.

Definition at line 106 of file katerenderer.cpp.

setShowTabs()

void KateRenderer::setShowTabs

(

bool

showTabs

)

Set whether a mark should be painted to help identifying tabs.

Parameters

showTabs

show the tabs?

Definition at line 101 of file katerenderer.cpp.

setTabWidth()

void KateRenderer::setTabWidth

(

int

tabWidth

)

Sets the width of the tab.

Helps performance.

Parameters

tabWidth

new tab width

Definition at line 116 of file katerenderer.cpp.

showIndentLines()

bool KateRenderer::showIndentLines

(

)

const

Returns

whether indent lines should be shown

indent lines should be shown

Definition at line 121 of file katerenderer.cpp.

showNonPrintableSpaces()

bool KateRenderer::showNonPrintableSpaces ( ) const

inline

Returns

whether non-printable spaces should be shown

Definition at line 189 of file katerenderer.h.

showSelections()

bool KateRenderer::showSelections ( ) const

inline

Show the view's selection?

Returns

show sels?

Definition at line 227 of file katerenderer.h.

showSpaces()

KateDocumentConfig::WhitespaceRendering KateRenderer::showSpaces ( ) const

inline

Returns

whether which spaces should be rendered

Definition at line 176 of file katerenderer.h.

showTabs()

bool KateRenderer::showTabs ( ) const

inline

Returns

whether tabs should be shown (ie. a small mark drawn to identify a tab)

tabs should be shown

Definition at line 157 of file katerenderer.h.

spaceWidth()

qreal KateRenderer::spaceWidth

(

)

const

Definition at line 1254 of file katerenderer.cpp.

specificAttribute()

KTextEditor::Attribute::Ptr KateRenderer::specificAttribute

(

int

context

)

const

Definition at line 82 of file katerenderer.cpp.

updateAttributes()

void KateRenderer::updateAttributes

(

)

update the highlighting attributes (for example after an hl change or after hl config changed)

Definition at line 68 of file katerenderer.cpp.

updateConfig()

void KateRenderer::updateConfig

(

)

Configuration.

Definition at line 1196 of file katerenderer.cpp.

updateMarkerSize()

void KateRenderer::updateMarkerSize

(

)

Update marker size shown.

Definition at line 1246 of file katerenderer.cpp.

view()

KTextEditor::ViewPrivate * KateRenderer::view ( ) const

inline

Returns the view to which this renderer is bound.

Definition at line 106 of file katerenderer.h.

xToCursor()

KTextEditor::Cursor KateRenderer::xToCursor	(	const KateTextLayout &	range,
		int	x,
		bool	returnPastLine = false ) const

Returns the real cursor which is occupied by the specified x value, or that closest to it.

If returnPastLine is true, the column will be extrapolated out with the assumption that the extra characters are spaces.

Definition at line 1482 of file katerenderer.cpp.

---

The documentation for this class was generated from the following files:

• katerenderer.h
• katerenderer.cpp