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Started the API definition of the new uiDrawTextLayout.

This commit is contained in:
Pietro Gagliardi 2016-12-23 12:24:20 -05:00
parent 4f6ed98e40
commit dfffc4c851
1 changed files with 45 additions and 0 deletions
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45
common/ui_attrstr.h
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@ -28,3 +28,48 @@ _UI_EXTERN void uiAttributedStringDelete(uiAttributedString *s, size_t start, si
_UI_EXTERN size_t uiAttributedStringNumGraphemes(uiAttributedString *s);
_UI_EXTERN size_t uiAttributedStringByteIndexToGrapheme(uiAttributedString *s, size_t pos);
_UI_EXTERN size_t uiAttributedStringGraphemeToByteIndex(uiAttributedString *s, size_t pos);
typedef struct uiDrawTextLayout uiDrawTextLayout;
typedef struct uiDrawTextLayoutLineMetrics uiDrawTextLayoutLineMetrics;
typedef struct uiDrawTextLayoutByteRangeRectangle uiDrawTextLayoutByteRangeRectangle;
struct uiDrawTextLayoutLineMetrics {
double X;
double Y;
double Width;
double Ascent;
double Descent;
double Leading;
};
_UI_ENUM(uiDrawTextLayoutHitTestResult) {
uiDrawTextLayoutHitTestResultNowhere,
uiDrawTextLayoutHitTestResultOnLineTrailingWhitespace,
uiDrawTextLayoutHitTestResultOnCharacter,
};
struct uiDrawTextLayoutByteRangeRectangle {
int Line;
double X;
double Y;
double Width;
double Height;
size_t RealStart;
size_t RealEnd;
};
_UI_EXTERN uiDrawTextLayout *uiDrawNewTextLayout(uiAttributedString *s, /* TODO default font */, double width);
_UI_EXTERN void uiDrawFreeTextLayout(uiDrawTextLayout *tl);
_UI_EXTERN void uiDrawText(uiDrawContext *c, uiDrawTextLayout *tl, double x, double y);
_UI_EXTERN void uiDrawTextLayoutExtents(uiDrawTextLayout *tl, double *width, double *height);
_UI_EXTERN int uiDrawTextLayoutNumLines(uiDrawTextLayout *tl);
_UI_EXTERN void uiDrawTextLayoutLineByteRange(uiDrawTextLayout *tl, int line, size_t *start, size_t *end);
_UI_EXTERN void uiDrawTextLayoutLineGetMetrics(uiDrawTextLayout *tl, int line, uiDrawTextLayoutLineMetrics *m);
// TODO redo this? remove it entirely?
_UI_EXTERN void uiDrawTextLayoutByteIndexToGraphemeRect(uiDrawTextLayout *tl, size_t pos, int *line, double *x, double *y, double *width, double *height);
// TODO partial offset?
_UI_EXTERN uiDrawTextLayoutHitTestResult uiDrawTextLayoutHitTest(uiDrawTextLayout *tl, double x, double y, size_t *byteIndex, int *line);
_UI_EXTERN void uiDrawTextLayoutByteRangeToRectangle(uiDrawTextLayout *tl, size_t start, size_t end, uiDrawTextLayoutByteRangeRectangle *r);
// TODO draw only a line?
// TODO other layout-specific attributes (alignment, wrapping, etc.)?
// TODO number of lines visible for clipping rect, range visible for clipping rect?