Implement bidirectional mode bidiL2R for DirectDraw on Win32.

1 files changed, 36 insertions, 0 deletions

diff --git a/src/PositionCache.h b/src/PositionCache.h
index 7f50c4dec..512ec13f5 100644
--- a/src/PositionCache.h
+++ b/src/PositionCache.h
@@ -40,6 +40,13 @@ enum PointEnd {
 	peSubLineEnd = 0x2
 };
 
+class BidiData {
+public:
+	std::vector<FontAlias> stylesFonts;
+	std::vector<XYPOSITION> widthReprs;
+	void Resize(size_t maxLineLength_);
+};
+
 /**
  */
 class LineLayout {
@@ -66,6 +73,8 @@ public:
 	std::unique_ptr<XYPOSITION[]> positions;
 	char bracePreviousStyles[2];
 
+	std::unique_ptr<BidiData> bidiData;
+
 	// Hotspot support
 	Range hotspot;
 
@@ -82,13 +91,16 @@ public:
 	void operator=(LineLayout &&) = delete;
 	virtual ~LineLayout();
 	void Resize(int maxLineLength_);
+	void EnsureBidiData();
 	void Free();
 	void Invalidate(validLevel validity_);
 	int LineStart(int line) const;
+	int LineLength(int line) const;
 	enum class Scope { visibleOnly, includeEnd };
 	int LineLastVisible(int line, Scope scope) const;
 	Range SubLineRange(int subLine, Scope scope) const;
 	bool InLine(int offset, int line) const;
+	int SubLineFromPosition(int posInLine, PointEnd pe) const;
 	void SetLineStart(int line, int start);
 	void SetBracesHighlight(Range rangeLine, const Sci::Position braces[],
 		char bracesMatchStyle, int xHighlight, bool ignoreStyle);
@@ -99,6 +111,30 @@ public:
 	int EndLineStyle() const;
 };
 
+struct ScreenLine : public IScreenLine {
+	const LineLayout *ll;
+	size_t start;
+	size_t len;
+	XYPOSITION width;
+	XYPOSITION height;
+	int ctrlCharPadding;
+	XYPOSITION tabWidth;
+	int tabWidthMinimumPixels;
+
+	ScreenLine(const LineLayout *ll_, int subLine, const ViewStyle &vs, XYPOSITION width_, int tabWidthMinimumPixels_);
+	virtual ~ScreenLine();
+
+	std::string_view Text() const override;
+	size_t Length() const override;
+	size_t RepresentationCount() const override;
+	XYPOSITION Width() const override;
+	XYPOSITION Height() const override;
+	XYPOSITION TabWidth() const override;
+	XYPOSITION TabWidthMinimumPixels() const override;
+	const Font *FontOfPosition(size_t position) const override;
+	XYPOSITION RepresentationWidth(size_t position) const override;
+};
+
 /**
  */
 class LineLayoutCache {