buffer_pos_from_relative_character
January 19th 2020
Compute the byte position associated with the start of a particular character specified relative to the first character of a particular line
Signature
i64
buffer_pos_from_relative_character(Application_Links* app,
Buffer_ID buffer_id,
f32 width,
Face_ID face_id,
i64 base_line,
i64 relative_character);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
base_line
the line number of the line that serves as the relative starting point of the measurement
relative_character
the relative character index of the query character, based at the first character of base line
Return
the byte index associated with the start of the character specified by the the base_line and relative_character parameters on success, when the buffer exists and contains the base line, zero otherwise
Details
Line numbers are 1 based.