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Whole-word selection in editboxes

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elasota
2020-12-17 19:49:09 -05:00
parent ebab2ee188
commit 2ebd3f2cf3
2 changed files with 318 additions and 25 deletions
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43
PortabilityLayer/PLEditboxWidget.h
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@@ -42,12 +42,40 @@ namespace PortabilityLayer
static const unsigned int kCaratBlinkRate = 20;
static const unsigned int kMouseScrollRate = 20;
enum SpanScanDirection
{
SpanScanDirection_Left,
SpanScanDirection_Right,
};
enum CaratSelectionAnchor
{
CaratSelectionAnchor_Start,
CaratSelectionAnchor_End
};
enum CharacterCategory
{
CharacterCategory_AlphaNumeric,
CharacterCategory_Whitespace,
CharacterCategory_LineBreak,
CharacterCategory_Punctuation,
};
struct CharacterCategorySpan
{
uint8_t m_lastCharacterPosInclusive;
CharacterCategory m_category;
};
enum CaratCharacterAlignment
{
CaratCharacterAlignment_Start, // Before the start of the text
CaratCharacterAlignment_AfterChar, // Carat is after the character that was clicked
CaratCharacterAlignment_BeforeChar, // Carat is before the character that was clicked
CaratCharacterAlignment_EndOfLine, // Carat is at the end of a line
};
void OnTick() override;
void Redraw();
@@ -57,13 +85,14 @@ namespace PortabilityLayer
void HandleUpArrow(const uint32_t numRepeatsRequested, bool shiftHeld);
void HandleDownArrow(const uint32_t numRepeatsRequested, bool shiftHeld);
void HandleLeftArrow(const uint32_t numRepeatsRequested, bool shiftHeld);
void HandleRightArrow(const uint32_t numRepeatsRequested, bool shiftHeld);
void HandleLeftArrow(const uint32_t numRepeatsRequested, bool shiftHeld, bool wholeWords);
void HandleRightArrow(const uint32_t numRepeatsRequested, bool shiftHeld, bool wholeWords);
void HandleHome(bool shiftHeld);
void HandleEnd(bool shiftHeld);
size_t FindVerticalMovementCaratPos(const Vec2i &desiredPos, bool &isOutOfRange) const;
size_t FindVerticalMovementCaratPos(const Vec2i &desiredPos, bool &isOutOfRange, CaratCharacterAlignment *optOutAlignment) const;
void ExpandSelectionToWords(size_t caratPos, size_t &outStartChar, size_t &outEndChar);
void HandleKeyMoveCarat(size_t newPos, bool shiftHeld);
WidgetHandleState_t HandleDragSelection(const TimeTaggedVOSEvent &evt);
@@ -75,6 +104,8 @@ namespace PortabilityLayer
size_t ResolveCaratChar() const;
void AdjustScrollToCarat();
void AdjustScrollToTextBounds();
size_t IdentifySpanLength(size_t startChar, SpanScanDirection scanDirection) const;
static CharacterCategory CategorizeCharacter(uint8_t character);
PortabilityLayer::FontFamily *GetFontFamily() const;
PortabilityLayer::RenderedFont *GetRenderedFont() const;
@@ -94,11 +125,17 @@ namespace PortabilityLayer
bool m_hasFocus;
bool m_isMultiLine;
bool m_isDraggingSelection;
bool m_isDraggingWords;
size_t m_dragSelectionStartChar;
size_t m_dragSelectionEndChar;
uint32_t m_doubleClickTime;
Point m_doubleClickPoint;
uint16_t m_caratTimer;
CharacterFilterCallback_t m_characterFilter;
void *m_characterFilterContext;
static const CharacterCategorySpan gs_characterCategorySpans[];
};
}