1 files changed, 142 insertions, 0 deletions
diff --git a/src/Selection.h b/src/Selection.h
new file mode 100644
index 000000000..fe6a1c464
--- /dev/null
+++ b/src/Selection.h
@@ -0,0 +1,142 @@
+// Scintilla source code edit control
+/** @file Selection.h
+ ** Classes maintaining the selection.
+ **/
+// Copyright 2009 by Neil Hodgson <neilh@scintilla.org>
+// The License.txt file describes the conditions under which this software may be distributed.
+
+#ifndef SELECTION_H
+#define SELECTION_H
+
+#ifdef SCI_NAMESPACE
+namespace Scintilla {
+#endif
+
+class SelectionPosition {
+	int position;
+	int virtualSpace;
+public:
+	explicit SelectionPosition(int position_=INVALID_POSITION, int virtualSpace_=0) : position(position_), virtualSpace(virtualSpace_) {
+		PLATFORM_ASSERT(virtualSpace < 800000);
+		if (virtualSpace < 0)
+			virtualSpace = 0;
+	}
+	void Reset() {
+		position = 0;
+		virtualSpace = 0;
+	}
+	void MoveForInsertDelete(bool insertion, int startChange, int length);
+	bool operator ==(const SelectionPosition &other) const {
+		return position == other.position && virtualSpace == other.virtualSpace;
+	}
+	bool operator <(const SelectionPosition &other) const;
+	bool operator >(const SelectionPosition &other) const;
+	bool operator <=(const SelectionPosition &other) const;
+	bool operator >=(const SelectionPosition &other) const;
+	int Position() const {
+		return position;
+	}
+	void SetPosition(int position_) {
+		position = position_;
+		virtualSpace = 0;
+	}
+	int VirtualSpace() const {
+		return virtualSpace;
+	}
+	void SetVirtualSpace(int virtualSpace_) {
+		PLATFORM_ASSERT(virtualSpace_ < 800000);
+		if (virtualSpace_ >= 0)
+			virtualSpace = virtualSpace_;
+	}
+	void Add(int increment) {
+		position = position + increment;
+	}
+};
+
+struct SelectionRange {
+	SelectionPosition caret;
+	SelectionPosition anchor;
+
+	SelectionRange() {
+	}
+	SelectionRange(SelectionPosition single) : caret(single), anchor(single) {
+	}
+	SelectionRange(SelectionPosition caret_, SelectionPosition anchor_) : caret(caret_), anchor(anchor_) {
+	}
+	SelectionRange(int caret_, int anchor_) : caret(caret_), anchor(anchor_) {
+	}
+	bool Empty() const {
+		return anchor == caret;
+	}
+	int Length() const;
+	bool operator ==(const SelectionRange &other) const {
+		return caret == other.caret && anchor == other.anchor;
+	}
+	void Reset() {
+		anchor.Reset();
+		caret.Reset();
+	}
+	void ClearVirtualSpace() {
+		anchor.SetVirtualSpace(0);
+		caret.SetVirtualSpace(0);
+	}
+	bool Contains(int pos) const;
+	bool Contains(SelectionPosition sp) const;
+	bool ContainsCharacter(int posCharacter) const;
+	bool Intersect(int start, int end, SelectionPosition &selStart, SelectionPosition &selEnd) const;
+	SelectionPosition Start() const {
+		return (anchor < caret) ? anchor : caret;
+	}
+	SelectionPosition End() const {
+		return (anchor < caret) ? caret : anchor;
+	}
+	bool Trim(SelectionPosition startPos, SelectionPosition endPos);
+	// If range is all virtual collapse to start of virtual space
+	void MinimizeVirtualSpace();
+};
+
+class Selection {
+	SelectionRange *ranges;
+	SelectionRange rangeRectangular;
+	size_t allocated;
+	size_t nRanges;
+	size_t mainRange;
+	bool moveExtends;
+	void Allocate();
+public:
+	enum selTypes { noSel, selStream, selRectangle, selLines, selThin };
+	selTypes selType;
+
+	Selection();
+	~Selection();
+	bool IsRectangular() const;
+	int MainCaret() const;
+	int MainAnchor() const;
+	SelectionRange &Rectangular();
+	size_t Count() const;
+	size_t Main() const;
+	void SetMain(size_t r);
+	SelectionRange &Range(size_t r);
+	SelectionRange &RangeMain();
+	void ClearVirtualSpace(size_t r);
+	bool MoveExtends() const;
+	void SetMoveExtends(bool moveExtends_);
+	bool Empty() const;
+	SelectionPosition Last() const;
+	int Length() const;
+	void MovePositions(bool insertion, int startChange, int length);
+	void TrimSelection(SelectionPosition startPos, SelectionPosition endPos);
+	void AddSelection(SelectionPosition spPos);
+	void AddSelection(SelectionPosition spStartPos, SelectionPosition spEndPos, bool anchorLeft);
+	bool CharacterInSelection(int posCharacter) const;
+	bool InSelectionForEOL(int pos) const;
+	int VirtualSpaceFor(int pos) const;
+	void Clear();
+	void EmptyRanges();
+};
+
+#ifdef SCI_NAMESPACE
+}
+#endif
+
+#endif