Contents
Is the overlay property part of the text?
Text properties are considered a part of the text; overlays and their properties are specifically considered not to be part of the text. Thus, copying text between various buffers and strings preserves text properties, but does not try to preserve overlays.
What are the key elements of feature overlay?
The key elements in feature overlay are the input layer, the overlay layer, and the output layer. The overlay function splits features in the input layer where they are overlapped by features in the overlay layer. New areas are created where polygons intersect. If the input layer contains lines, the lines are split where polygons cross them.
How is priority value used in overlay function?
The priority value is used to decide which of the overlapping overlays will “win”. These functions read and set the properties of an overlay: This function returns the value of property prop recorded in overlay, if any.
How does the overlay function work in Photoshop?
The overlay function splits features in the input layer where they are overlapped by features in the overlay layer. New areas are created where polygons intersect. If the input layer contains lines, the lines are split where polygons cross them.
Which is an invisible property of a character?
A character is invisible if its invisible property value is atom or if it is a list with atom as a member; comparison is done with eq. Moreover, a sequence of such characters displays as an ellipsis. Two functions are specifically provided for adding elements to buffer-invisibility-spec and removing elements from it.
How does overlay property change work in Emacs?
Unlike text property changes, overlay property changes are not recorded in the buffer’s undo list. Since more than one overlay can specify a property value for the same character, Emacs lets you specify a priority value of each overlay. The priority value is used to decide which of the overlapping overlays will “win”.
Is there a way to make text invisible?
More generally, you can use the variable buffer-invisibility-spec to control which values of the invisible property make text invisible.
How to avoid inheriting child opacity in CSS?
As others have mentioned in this and other similar threads, the best way to avoid this problem is to use RGBA/HSLA or else use a transparent PNG.