// Scintilla source code edit control
/** @file ViewStyle.cxx
 ** Store information on how the document is to be viewed.
 **/
// Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.

#include <cstddef>
#include <cassert>
#include <cstring>
#include <cmath>

#include <stdexcept>
#include <string>
#include <string_view>
#include <vector>
#include <array>
#include <map>
#include <set>
#include <optional>
#include <algorithm>
#include <memory>
#include <numeric>

#include "ScintillaTypes.h"

#include "Debugging.h"
#include "Geometry.h"
#include "Platform.h"

#include "Position.h"
#include "UniqueString.h"
#include "Indicator.h"
#include "XPM.h"
#include "LineMarker.h"
#include "Style.h"
#include "ViewStyle.h"

using namespace Scintilla;
using namespace Scintilla::Internal;

MarginStyle::MarginStyle(MarginType style_, int width_, int mask_) noexcept :
	style(style_), width(width_), mask(mask_), sensitive(false), cursor(CursorShape::ReverseArrow) {
}

bool MarginStyle::ShowsFolding() const noexcept {
	return (mask & MaskFolders) != 0;
}

void FontRealised::Realise(Surface &surface, int zoomLevel, Technology technology, const FontSpecification &fs, const char *localeName) {
	PLATFORM_ASSERT(fs.fontName);
	measurements.sizeZoomed = fs.size + zoomLevel * FontSizeMultiplier;
	if (measurements.sizeZoomed <= FontSizeMultiplier)	// May fail if sizeZoomed < 1
		measurements.sizeZoomed = FontSizeMultiplier;

	const float deviceHeight = static_cast<float>(surface.DeviceHeightFont(measurements.sizeZoomed));
	const FontParameters fp(fs.fontName, deviceHeight / FontSizeMultiplier, fs.weight,
		fs.italic, fs.extraFontFlag, technology, fs.characterSet, localeName);
	font = Font::Allocate(fp);

	// floor here is historical as platform layers have tweaked their values to match.
	// ceil would likely be better to ensure (nearly) all of the ink of a character is seen
	// but that would require platform layer changes.
	measurements.ascent = std::floor(surface.Ascent(font.get()));
	measurements.descent = std::floor(surface.Descent(font.get()));

	measurements.capitalHeight = surface.Ascent(font.get()) - surface.InternalLeading(font.get());
	measurements.aveCharWidth = surface.AverageCharWidth(font.get());
	measurements.monospaceCharacterWidth = measurements.aveCharWidth;
	measurements.spaceWidth = surface.WidthText(font.get(), " ");

	if (fs.checkMonospaced) {
		// "Ay" is normally strongly kerned and "fi" may be a ligature
		constexpr std::string_view allASCIIGraphic("Ayfi"
		// python: ''.join(chr(ch) for ch in range(32, 127))
		" !\"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~");
		std::array<XYPOSITION, allASCIIGraphic.length()> positions {};
		surface.MeasureWidthsUTF8(font.get(), allASCIIGraphic, positions.data());
		std::adjacent_difference(positions.begin(), positions.end(), positions.begin());
		const XYPOSITION maxWidth = *std::max_element(positions.begin(), positions.end());
		const XYPOSITION minWidth = *std::min_element(positions.begin(), positions.end());
		const XYPOSITION variance = maxWidth - minWidth;
		const XYPOSITION scaledVariance = variance / measurements.aveCharWidth;
		constexpr XYPOSITION monospaceWidthEpsilon = 0.000001;	// May need tweaking if monospace fonts vary more
		measurements.monospaceASCII = scaledVariance < monospaceWidthEpsilon;
		measurements.monospaceCharacterWidth = minWidth;
	} else {
		measurements.monospaceASCII = false;
	}
}

ViewStyle::ViewStyle(size_t stylesSize_) :
	styles(stylesSize_),
	markers(MarkerMax + 1),
	indicators(static_cast<size_t>(IndicatorNumbers::Max) + 1) {

	nextExtendedStyle = 256;
	ResetDefaultStyle();

	// There are no image markers by default, so no need for calling CalcLargestMarkerHeight()
	largestMarkerHeight = 0;

	indicators[0] = Indicator(IndicatorStyle::Squiggle, ColourRGBA(0, 0x7f, 0));
	indicators[1] = Indicator(IndicatorStyle::TT, ColourRGBA(0, 0, 0xff));
	indicators[2] = Indicator(IndicatorStyle::Plain, ColourRGBA(0xff, 0, 0));

	// Reverted to origin
	constexpr ColourRGBA revertedToOrigin(0x40, 0xA0, 0xBF);
	// Saved
	constexpr ColourRGBA saved(0x0, 0xA0, 0x0);
	// Modified
	constexpr ColourRGBA modified(0xFF, 0x80, 0x0);
	// Reverted to change
	constexpr ColourRGBA revertedToChange(0xA0, 0xC0, 0x0);

	// Edition indicators
	constexpr size_t indexHistory = static_cast<size_t>(IndicatorNumbers::HistoryRevertedToOriginInsertion);

	indicators[indexHistory+0] = Indicator(IndicatorStyle::CompositionThick, revertedToOrigin, false, 30, 60);
	indicators[indexHistory+1] = Indicator(IndicatorStyle::Point, revertedToOrigin);
	indicators[indexHistory+2] = Indicator(IndicatorStyle::CompositionThick, saved, false, 30, 60);
	indicators[indexHistory+3] = Indicator(IndicatorStyle::Point, saved);
	indicators[indexHistory+4] = Indicator(IndicatorStyle::CompositionThick, modified, false, 30, 60);
	indicators[indexHistory+5] = Indicator(IndicatorStyle::PointTop, modified);
	indicators[indexHistory+6] = Indicator(IndicatorStyle::CompositionThick, revertedToChange, false, 30, 60);
	indicators[indexHistory+7] = Indicator(IndicatorStyle::Point, revertedToChange);

	// Edition markers
	// Reverted to origin
	constexpr size_t indexHistoryRevertedToOrigin = static_cast<size_t>(MarkerOutline::HistoryRevertedToOrigin);
	markers[indexHistoryRevertedToOrigin].back = revertedToOrigin;
	markers[indexHistoryRevertedToOrigin].fore = revertedToOrigin;
	markers[indexHistoryRevertedToOrigin].markType = MarkerSymbol::Bar;
	// Saved
	constexpr size_t indexHistorySaved = static_cast<size_t>(MarkerOutline::HistorySaved);
	markers[indexHistorySaved].back = saved;
	markers[indexHistorySaved].fore = saved;
	markers[indexHistorySaved].markType = MarkerSymbol::Bar;
	// Modified
	constexpr size_t indexHistoryModified = static_cast<size_t>(MarkerOutline::HistoryModified);
	markers[indexHistoryModified].back = Platform::Chrome();
	markers[indexHistoryModified].fore = modified;
	markers[indexHistoryModified].markType = MarkerSymbol::Bar;
	// Reverted to change
	constexpr size_t indexHistoryRevertedToModified = static_cast<size_t>(MarkerOutline::HistoryRevertedToModified);
	markers[indexHistoryRevertedToModified].back = revertedToChange;
	markers[indexHistoryRevertedToModified].fore = revertedToChange;
	markers[indexHistoryRevertedToModified].markType = MarkerSymbol::Bar;

	technology = Technology::Default;
	indicatorsDynamic = false;
	indicatorsSetFore = false;
	lineHeight = 1;
	lineOverlap = 0;
	maxAscent = 1;
	maxDescent = 1;
	aveCharWidth = 8;
	spaceWidth = 8;
	tabWidth = spaceWidth * 8;

	// Default is for no selection foregrounds
	elementColours.erase(Element::SelectionText);
	elementColours.erase(Element::SelectionAdditionalText);
	elementColours.erase(Element::SelectionSecondaryText);
	elementColours.erase(Element::SelectionInactiveText);
	// Shades of grey for selection backgrounds
	elementBaseColours[Element::SelectionBack] = ColourRGBA(0xc0, 0xc0, 0xc0, 0xff);
	elementBaseColours[Element::SelectionAdditionalBack] = ColourRGBA(0xd7, 0xd7, 0xd7, 0xff);
	elementBaseColours[Element::SelectionSecondaryBack] = ColourRGBA(0xb0, 0xb0, 0xb0, 0xff);
	elementBaseColours[Element::SelectionInactiveBack] = ColourRGBA(0x80, 0x80, 0x80, 0x3f);
	elementAllowsTranslucent.insert({
		Element::SelectionText,
		Element::SelectionBack,
		Element::SelectionAdditionalText,
		Element::SelectionAdditionalBack,
		Element::SelectionSecondaryText,
		Element::SelectionSecondaryBack,
		Element::SelectionInactiveText,
		Element::SelectionInactiveBack,
		});

	foldmarginColour.reset();
	foldmarginHighlightColour.reset();

	controlCharSymbol = 0;	/* Draw the control characters */
	controlCharWidth = 0;
	selbar = Platform::Chrome();
	selbarlight = Platform::ChromeHighlight();
	styles[StyleLineNumber].fore = ColourRGBA(0, 0, 0);
	styles[StyleLineNumber].back = Platform::Chrome();

	elementBaseColours[Element::Caret] = ColourRGBA(0, 0, 0);
	elementBaseColours[Element::CaretAdditional] = ColourRGBA(0x7f, 0x7f, 0x7f);
	elementAllowsTranslucent.insert({
		Element::Caret,
		Element::CaretAdditional,
		});

	elementColHTTP/1.1 200 OK
Connection: keep-alive
Connection: keep-alive
Content-Disposition: inline; filename="ViewStyle.cxx"
Content-Disposition: inline; filename="ViewStyle.cxx"
Content-Length: 27556
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Content-Security-Policy: default-src 'none'
Content-Security-Policy: default-src 'none'
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Date: Mon, 20 Oct 2025 21:36:16 UTC
ETag: "b8fe0c0d6e418ab37b3b74c6fdf0d4161bf37487"
ETag: "b8fe0c0d6e418ab37b3b74c6fdf0d4161bf37487"
Expires: Thu, 18 Oct 2035 21:36:16 GMT
Expires: Thu, 18 Oct 2035 21:36:16 GMT
Last-Modified: Mon, 20 Oct 2025 21:36:16 GMT
Last-Modified: Mon, 20 Oct 2025 21:36:16 GMT
Server: OpenBSD httpd
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// Scintilla source code edit control
/** @file ViewStyle.cxx
 ** Store information on how the document is to be viewed.
 **/
// Copyright 1998-2003 by Neil Hodgson <neilh@scintilla.org>
// The License.txt file describes the conditions under which this software may be distributed.

#include <cstddef>
#include <cassert>
#include <cstring>
#include <cmath>

#include <stdexcept>
#include <string>
#include <string_view>
#include <vector>
#include <array>
#include <map>
#include <set>
#include <optional>
#include <algorithm>
#include <memory>
#include <numeric>

#include "ScintillaTypes.h"

#include "Debugging.h"
#include "Geometry.h"
#include "Platform.h"

#include "Position.h"
#include "UniqueString.h"
#include "Indicator.h"
#include "XPM.h"
#include "LineMarker.h"
#include "Style.h"
#include "ViewStyle.h"

using namespace Scintilla;
using namespace Scintilla::Internal;

MarginStyle::MarginStyle(MarginType style_, int width_, int mask_) noexcept :
	style(style_), width(width_), mask(mask_), sensitive(false), cursor(CursorShape::ReverseArrow) {
}

bool MarginStyle::ShowsFolding() const noexcept {
	return (mask & MaskFolders) != 0;
}

void FontRealised::Realise(Surface &surface, int zoomLevel, Technology technology, const FontSpecification &fs, const char *localeName) {
	PLATFORM_ASSERT(fs.fontName);
	measurements.sizeZoomed = fs.size + zoomLevel * FontSizeMultiplier;
	if (measurements.sizeZoomed <= FontSizeMultiplier)	// May fail if sizeZoomed < 1
		measurements.sizeZoomed = FontSizeMultiplier;

	const float deviceHeight = static_cast<float>(surface.DeviceHeightFont(measurements.sizeZoomed));
	const FontParameters fp(fs.fontName, deviceHeight / FontSizeMultiplier, fs.weight,
		fs.italic, fs.extraFontFlag, technology, fs.characterSet, localeName);
	font = Font::Allocate(fp);

	// floor here is historical as platform layers have tweaked their values to match.
	// ceil would likely be better to ensure (nearly) all of the ink of a character is seen
	// but that would require platform layer changes.
	measurements.ascent = std::floor(surface.Ascent(font.get()));
	measurements.descent = std::floor(surface.Descent(font.get()));

	measurements.capitalHeight = surface.Ascent(font.get()) - surface.InternalLeading(font.get());
	measurements.aveCharWidth = surface.AverageCharWidth(font.get());
	measurements.monospaceCharacterWidth = measurements.aveCharWidth;
	measurements.spaceWidth = surface.WidthText(font.get(), " ");

	if (fs.checkMonospaced) {
		// "Ay" is normally strongly kerned and "fi" may be a ligature
		constexpr std::string_view allASCIIGraphic("Ayfi"
		// python: ''.join(chr(ch) for ch in range(32, 127))
		" !\"#$%&\'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~");
		std::array<XYPOSITION, allASCIIGraphic.length()> positions {};
		surface.MeasureWidthsUTF8(font.get(), allASCIIGraphic, positions.data());
		std::adjacent_difference(positions.begin(), positions.end(), positions.begin());
		const XYPOSITION maxWidth = *std::max_element(positions.begin(), positions.end());
		const XYPOSITION minWidth = *std::min_element(positions.begin(), positions.end());
		const XYPOSITION variance = maxWidth - minWidth;
		const XYPOSITION scaledVariance = variance / measurements.aveCharWidth;
		constexpr XYPOSITION monospaceWidthEpsilon = 0.000001;	// May need tweaking if monospace fonts vary more
		measurements.monospaceASCII = scaledVariance < monospaceWidthEpsilon;
		measurements.monospaceCharacterWidth = minWidth;
	} else {
		measurements.monospaceASCII = false;
	}
}

ViewStyle::ViewStyle(size_t stylesSize_) :
	styles(stylesSize_),
	markers(MarkerMax + 1),
	indicators(static_cast<size_t>(IndicatorNumbers::Max) + 1) {

	nextExtendedStyle = 256;
	ResetDefaultStyle();

	// There are no image markers by default, so no need for calling CalcLargestMarkerHeight()
	largestMarkerHeight = 0;

	indicators[0] = Indicator(IndicatorStyle::Squiggle, ColourRGBA(0, 0x7f, 0));
	indicators[1] = Indicator(IndicatorStyle::TT, ColourRGBA(0, 0, 0xff));
	indicators[2] = Indicator(IndicatorStyle::Plain, ColourRGBA(0xff, 0, 0));

	// Reverted to origin
	constexpr ColourRGBA revertedToOrigin(0x40, 0xA0, 0xBF);
	// Saved
	constexpr ColourRGBA saved(0x0, 0xA0, 0x0);
	// Modified
	constexpr ColourRGBA modified(0xFF, 0x80, 0x0);
	// Reverted to change
	constexpr ColourRGBA revertedToChange(0xA0, 0xC0, 0x0);

	// Edition indicators
	constexpr size_t indexHistory = static_cast<size_t>(IndicatorNumbers::HistoryRevertedToOriginInsertion);

	indicators[indexHistory+0] = Indicator(IndicatorStyle::CompositionThick, revertedToOrigin, false, 30, 60);
	indicators[indexHistory+1] = Indicator(IndicatorStyle::Point, revertedToOrigin);
	indicators[indexHistory+2] = Indicator(IndicatorStyle::CompositionThick, saved, false, 30, 60);
	indicators[indexHistory+3] = Indicator(IndicatorStyle::Point, saved);
	indicators[indexHistory+4] = Indicator(IndicatorStyle::CompositionThick, modified, false, 30, 60);
	indicators[indexHistory+5] = Indicator(IndicatorStyle::PointTop, modified);
	indicators[indexHistory+6] = Indicator(IndicatorStyle::CompositionThick, revertedToChange, false, 30, 60);
	indicators[indexHistory+7] = Indicator(IndicatorStyle::Point, revertedToChange);

	// Edition markers
	// Reverted to origin
	constexpr size_t indexHistoryRevertedToOrigin = static_cast<size_t>(MarkerOutline::HistoryRevertedToOrigin);
	markers[indexHistoryRevertedToOrigin].back = revertedToOrigin;
	markers[indexHistoryRevertedToOrigin].fore = revertedToOrigin;
	markers[indexHistoryRevertedToOrigin].markType = MarkerSymbol::Bar;
	// Saved
	constexpr size_t indexHistorySaved = static_cast<size_t>(MarkerOutline::HistorySaved);
	markers[indexHistorySaved].back = saved;
	markers[indexHistorySaved].fore = saved;
	markers[indexHistorySaved].markType = MarkerSymbol::Bar;
	// Modified
	constexpr size_t indexHistoryModified = static_cast<size_t>(MarkerOutline::HistoryModified);
	markers[indexHistoryModified].back = Platform::Chrome();
	markers[indexHistoryModified].fore = modified;
	markers[indexHistoryModified].markType = MarkerSymbol::Bar;
	// Reverted to change
	constexpr size_t indexHistoryRevertedToModified = static_cast<size_t>(MarkerOutline::HistoryRevertedToModified);
	markers[indexHistoryRevertedToModified].back = revertedToChange;
	markers[indexHistoryRevertedToModified].fore = revertedToChange;
	markers[indexHistoryRevertedToModified].markType = MarkerSymbol::Bar;

	technology = Technology::Default;
	indicatorsDynamic = false;
	indicatorsSetFore = false;
	lineHeight = 1;
	lineOverlap = 0;
	maxAscent = 1;
	maxDescent = 1;
	aveCharWidth = 8;
	spaceWidth = 8;
	tabWidth = spaceWidth * 8;

	// Default is for no selection foregrounds
	elementColours.erase(Element::SelectionText);
	elementColours.erase(Element::SelectionAdditionalText);
	elementColours.erase(Element::SelectionSecondaryText);
	elementColours.erase(Element::SelectionInactiveText);
	// Shades of grey for selection backgrounds
	elementBaseColours[Element::SelectionBack] = ColourRGBA(0xc0, 0xc0, 0xc0, 0xff);
	elementBaseColours[Element::SelectionAdditionalBack] = ColourRGBA(0xd7, 0xd7, 0xd7, 0xff);
	elementBaseColours[Element::SelectionSecondaryBack] = ColourRGBA(0xb0, 0xb0, 0xb0, 0xff);
	elementBaseColours[Element::SelectionInactiveBack] = ColourRGBA(0x80, 0x80, 0x80, 0x3f);
	elementAllowsTranslucent.insert({
		Element::SelectionText,
		Element::SelectionBack,
		Element::SelectionAdditionalText,
		Element::SelectionAdditionalBack,
		Element::SelectionSecondaryText,
		Element::SelectionSecondaryBack,
		Element::SelectionInactiveText,
		Element::SelectionInactiveBack,
		});

	foldmarginColour.reset();
	foldmarginHighlightColour.reset();

	controlCharSymbol = 0;	/* Draw the control characters */
	controlCharWidth = 0;
	selbar = Platform::Chrome();
	selbarlight = Platform::ChromeHighlight();
	styles[StyleLineNumber].fore = ColourRGBA(0, 0, 0);
	styles[StyleLineNumber].back = Platform::Chrome();

	elementBaseColours[Element::Caret] = ColourRGBA(0, 0, 0);
	elementBaseColours[Element::CaretAdditional] = ColourRGBA(0x7f, 0x7f, 0x7f);
	elementAllowsTranslucent.insert({
		Element::Caret,
		Element::CaretAdditional,
		});

	elementColours.erase(Element::CaretLineBack);
	elementAllowsTranslucent.insert(Element::CaretLineBack);

	someStylesProtected = false;
	someStylesForceCase = false;

	hotspotUnderline = true;
	elementColours.erase(Element::HotSpotActive);
	elementAllowsTranslucent.insert(Element::HotSpotActive);

	leftMarginWidth = 1;
	rightMarginWidth = 1;
	ms.resize(MaxMargin + 1);
	ms[0] = MarginStyle(MarginType::Number);
	ms[1] = MarginStyle(MarginType::Symbol, 16, ~MaskFolders);
	ms[2] = MarginStyle(MarginType::Symbol);
	marginInside = true;
	CalculateMarginWidthAndMask();
	textStart = marginInside ? fixedColumnWidth : leftMarginWidth;
	zoomLevel = 0;
	viewWhitespace = WhiteSpace::Invisible;
	tabDrawMode = TabDrawMode::LongArrow;
	whitespaceSize = 1;
	elementColours.erase(Element::WhiteSpace);
	elementAllowsTranslucent.insert(Element::WhiteSpace);

	viewIndentationGuides = IndentView::None;
	viewEOL = false;
	extraFontFlag = FontQuality::QualityDefault;
	extraAscent = 0;
	extraDescent = 0;
	marginStyleOffset = 0;
	annotationVisible = AnnotationVisible::Hidden;
	annotationStyleOffset = 0;
	eolAnnotationVisible = EOLAnnotationVisible::Hidden;
	eolAnnotationStyleOffset = 0;
	braceHighlightIndicatorSet = false;
	braceHighlightIndicator = 0;
	braceBadLightIndicatorSet = false;
	braceBadLightIndicator = 0;

	edgeState = EdgeVisualStyle::None;
	theEdge = EdgeProperties(0, ColourRGBA(0xc0, 0xc0, 0xc0));

	marginNumberPadding = 3;
	ctrlCharPadding = 3; // +3 For a blank on front and rounded edge each side
	lastSegItalicsOffset = 2;

	localeName = localeNameDefault;
}

// Copy constructor only called when printing copies the screen ViewStyle so it can be
// modified for printing styles.
ViewStyle::ViewStyle(const ViewStyle &source) : ViewStyle(source.styles.size()) {
	styles = source.styles;
	for (Style &style : styles) {
		// Can't just copy fontName as its lifetime is relative to its owning ViewStyle
		style.fontName = fontNames.Save(style.fontName);
	}
	nextExtendedStyle = source.nextExtendedStyle;
	markers = source.markers;
	CalcLargestMarkerHeight();

	indicators = source.indicators;

	indicatorsDynamic = source.indicatorsDynamic;
	indicatorsSetFore = source.indicatorsSetFore;

	selection = source.selection;

	foldmarginColour = source.foldmarginColour;
	foldmarginHighlightColour = source.foldmarginHighlightColour;

	hotspotUnderline = source.hotspotUnderline;

	controlCharSymbol = source.controlCharSymbol;
	controlCharWidth = source.controlCharWidth;
	selbar = source.selbar;
	selbarlight = source.selbarlight;
	caret = source.caret;
	caretLine = source.caretLine;
	someStylesProtected = false;
	someStylesForceCase = false;
	leftMarginWidth = source.leftMarginWidth;
	rightMarginWidth = source.rightMarginWidth;
	ms = source.ms;
	maskInLine = source.maskInLine;
	maskDrawInText = source.maskDrawInText;
	maskDrawWrapped = source.maskDrawWrapped;
	fixedColumnWidth = source.fixedColumnWidth;
	marginInside = source.marginInside;
	textStart = source.textStart;
	zoomLevel = source.zoomLevel;
	viewWhitespace = source.viewWhitespace;
	tabDrawMode = source.tabDrawMode;
	whitespaceSize = source.whitespaceSize;
	viewIndentationGuides = source.viewIndentationGuides;
	viewEOL = source.viewEOL;
	extraFontFlag = source.extraFontFlag;
	extraAscent = source.extraAscent;
	extraDescent = source.extraDescent;
	marginStyleOffset = source.marginStyleOffset;
	annotationVisible = source.annotationVisible;
	annotationStyleOffset = source.annotationStyleOffset;
	eolAnnotationVisible = source.eolAnnotationVisible;
	eolAnnotationStyleOffset = source.eolAnnotationStyleOffset;
	braceHighlightIndicatorSet = source.braceHighlightIndicatorSet;
	braceHighlightIndicator = source.braceHighlightIndicator;
	braceBadLightIndicatorSet = source.braceBadLightIndicatorSet;
	braceBadLightIndicator = source.braceBadLightIndicator;

	edgeState = source.edgeState;
	theEdge = source.theEdge;
	theMultiEdge = source.theMultiEdge;

	marginNumberPadding = source.marginNumberPadding;
	ctrlCharPadding = source.ctrlCharPadding;
	lastSegItalicsOffset = source.lastSegItalicsOffset;

	wrap = source.wrap;

	localeName = source.localeName;
}

ViewStyle::~ViewStyle() = default;

void ViewStyle::CalculateMarginWidthAndMask() noexcept {
	fixedColumnWidth = marginInside ? leftMarginWidth : 0;
	maskInLine = 0xffffffff;
	int maskDefinedMarkers = 0;
	for (const MarginStyle &m : ms) {
		fixedColumnWidth += m.width;
		if (m.width > 0)
			maskInLine &= ~m.mask;
		maskDefinedMarkers |= m.mask;
	}
	maskDrawInText = 0;
	for (int markBit = 0; markBit < 32; markBit++) {
		const int maskBit = 1U << markBit;
		switch (markers[markBit].markType) {
		case MarkerSymbol::Empty:
			maskInLine &= ~maskBit;
			break;
		case MarkerSymbol::Background:
		case MarkerSymbol::Underline:
			maskInLine &= ~maskBit;
			maskDrawInText |= maskDefinedMarkers & maskBit;
			break;
		default:	// Other marker types do not affect the masks
			break;
		}
	}
	maskDrawWrapped = 0;
	for (int markBit = 0; markBit < 32; markBit++) {
		const int maskBit = 1U << markBit;
		switch (markers[markBit].markType) {
		case MarkerSymbol::Bar:
			maskDrawWrapped |= maskBit;
			break;
		default:	// Other marker types do not affect the masks
			break;
		}
	}
}

void ViewStyle::Refresh(Surface &surface, int tabInChars) {
	fonts.clear();

	selbar = Platform::Chrome();
	selbarlight = Platform::ChromeHighlight();

	// Apply the extra font flag which controls text drawing quality to each style.
	for (Style &style : styles) {
		style.extraFontFlag = extraFontFlag;
	}

	// Create a FontRealised object for each unique font in the styles.
	CreateAndAddFont(styles[StyleDefault]);
	for (const Style &style : styles) {
		CreateAndAddFont(style);
	}

	// Ask platform to allocate each unique font.
	for (const std::pair<const FontSpecification, std::unique_ptr<FontRealised>> &font : fonts) {
		font.second->Realise(surface, zoomLevel, technology, font.first, localeName.c_str());
	}

	// Set the platform font handle and measurements for each style.
	for (Style &style : styles) {
		const FontRealised *fr = Find(style);
		style.Copy(fr->font, fr->measurements);
	}

	indicatorsDynamic = std::any_of(indicators.cbegin(), indicators.cend(),
		[](const Indicator &indicator) noexcept { return indicator.IsDynamic(); });

	indicatorsSetFore = std::any_of(indicators.cbegin(), indicators.cend(),
		[](const Indicator &indicator) noexcept { return indicator.OverridesTextFore(); });

	maxAscent = 1;
	maxDescent = 1;
	FindMaxAscentDescent();
	// Ensure reasonable values: lines less than 1 pixel high will not work
	maxAscent = std::max(1.0, maxAscent + extraAscent);
	maxDescent = std::max(0.0, maxDescent + extraDescent);
	lineHeight = static_cast<int>(std::lround(maxAscent + maxDescent));
	lineOverlap = lineHeight / 10;
	if (lineOverlap < 2)
		lineOverlap = 2;
	if (lineOverlap > lineHeight)
		lineOverlap = lineHeight;

	someStylesProtected = std::any_of(styles.cbegin(), styles.cend(),
		[](const Style &style) noexcept { return style.IsProtected(); });

	someStylesForceCase = std::any_of(styles.cbegin(), styles.cend(),
		[](const Style &style) noexcept { return style.caseForce != Style::CaseForce::mixed; });

	aveCharWidth = styles[StyleDefault].aveCharWidth;
	spaceWidth = styles[StyleDefault].spaceWidth;
	tabWidth = spaceWidth * tabInChars;

	controlCharWidth = 0.0;
	if (controlCharSymbol >= 32) {
		const char cc[2] = { static_cast<char>(controlCharSymbol), '\0' };
		controlCharWidth = surface.WidthText(styles[StyleControlChar].font.get(), cc);
	}

	CalculateMarginWidthAndMask();
	textStart = marginInside ? fixedColumnWidth : leftMarginWidth;
}

void ViewStyle::ReleaseAllExtendedStyles() noexcept {
	nextExtendedStyle = 256;
}

int ViewStyle::AllocateExtendedStyles(int numberStyles) {
	const int startRange = nextExtendedStyle;
	nextExtendedStyle += numberStyles;
	EnsureStyle(nextExtendedStyle);
	return startRange;
}

void ViewStyle::EnsureStyle(size_t index) {
	if (index >= styles.size()) {
		AllocStyles(index+1);
	}
}

void ViewStyle::ResetDefaultStyle() {
	styles[StyleDefault] = Style(fontNames.Save(Platform::DefaultFont()));
}

void ViewStyle::ClearStyles() {
	// Reset all styles to be like the default style
	for (size_t i=0; i<styles.size(); i++) {
		if (i != StyleDefault) {
			styles[i] = styles[StyleDefault];
		}
	}
	styles[StyleLineNumber].back = Platform::Chrome();

	// Set call tip fore/back to match the values previously set for call tips
	styles[StyleCallTip].back = ColourRGBA(0xff, 0xff, 0xff);
	styles[StyleCallTip].fore = ColourRGBA(0x80, 0x80, 0x80);
}

void ViewStyle::SetStyleFontName(int styleIndex, const char *name) {
	styles[styleIndex].fontName = fontNames.Save(name);
}

void ViewStyle::SetFontLocaleName(const char *name) {
	localeName = name;
}

bool ViewStyle::ProtectionActive() const noexcept {
	return someStylesProtected;
}

int ViewStyle::ExternalMarginWidth() const noexcept {
	return marginInside ? 0 : fixedColumnWidth;
}

int ViewStyle::MarginFromLocation(Point pt) const noexcept {
	XYPOSITION x = marginInside ? 0 : -fixedColumnWidth;
	for (size_t i = 0; i < ms.size(); i++) {
		if ((pt.x >= x) && (pt.x < x + ms[i].width))
			return static_cast<int>(i);
		x += ms[i].width;
	}
	return -1;
}

bool ViewStyle::ValidStyle(size_t styleIndex) const noexcept {
	return styleIndex < styles.size();
}

void ViewStyle::CalcLargestMarkerHeight() noexcept {
	largestMarkerHeight = 0;
	for (const LineMarker &marker : markers) {
		switch (marker.markType) {
		case MarkerSymbol::Pixmap:
			if (marker.pxpm && marker.pxpm->GetHeight() > largestMarkerHeight)
				largestMarkerHeight = marker.pxpm->GetHeight();
			break;
		case MarkerSymbol::RgbaImage:
			if (marker.image && marker.image->GetHeight() > largestMarkerHeight)
				largestMarkerHeight = marker.image->GetHeight();
			break;
		case MarkerSymbol::Bar:
			largestMarkerHeight = lineHeight + 2;
			break;
		default:	// Only images have their own natural heights
			break;
		}
	}
}

int ViewStyle::GetFrameWidth() const noexcept {
	return std::clamp(caretLine.frame, 1, lineHeight / 3);
}

bool ViewStyle::IsLineFrameOpaque(bool caretActive, bool lineContainsCaret) const {
	return caretLine.frame && (caretActive || caretLine.alwaysShow) &&
		ElementColour(Element::CaretLineBack) &&
		(caretLine.layer == Layer::Base) && lineContainsCaret;
}

// See if something overrides the line background c