Bug 562677

Summary:	Can't properly highlight multiple selection in a StyledText line (a TextLayout instance)
Product:	[Eclipse Project] Platform	Reporter:	Mickael Istria <mistria>
Component:	SWT	Assignee:	Platform-SWT-Inbox <platform-swt-inbox>
Status:	NEW ---	QA Contact:
Severity:	enhancement
Priority:	P3	CC:	gautier.desaintmartinlacaze
Version:	4.16
Target Milestone:	---
Hardware:	All
OS:	All
Whiteboard:
Bug Depends on:
Bug Blocks:	562676

Description Mickael Istria

2020-04-30 17:14:55 EDT

Currently, TextLayout doesn't support multiple selected range (one selectionStart and one selectionEnd item in constructor).
The hack used by bug 562676 at the moment consists in drawing the line multiple times with different selection ranges as the background color which is one of the main feedback for selection seems to not be overridden between draws, but that's suboptimal since the newer drawing can override some pixels from former drawing like for example the actual text color, so a text that's supposed to be white on blue background because is selected can appear as black on blue background because is was redrawn with non-matching selection parameters.