buffer_line_shift_y
September 8th 2024
Compute a new line number and pixel shift relative to a given line number and pixel shift, guaranteeing that the new line number is the one closest to containing the new point
Signature
Line_Shift_Vertical
buffer_line_shift_y(Application_Links* app,
Buffer_ID buffer_id,
f32 width,
Face_ID face_id,
i64 line,
f32 y_shift);Parameters
app
the standard custom layer context pointer
buffer_id
the id of the buffer who's layout will be measured
width
the width parameter of the layout, passed to layout rules as a recommended wrap point
face_id
the face parameter of the layout, passed to layout rules as a recommended face
line
the line number of the line that serves as the relative starting point of the measurement
y_shift
the y shift, in pixels, from the top of the specified line to be measured
Return
the best match line number and the remaining y shift that is not accounted for by the change in line number on success, when the buffer exists and contains the line, cleared to zero otherwise
Details
Line numbers are 1 based.
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