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Analysis

Overview

The current Hot Layout has several important issues:

• It is not known how will hyphenation be integrated with it;
• Spell check underlining is not currently possible;
• Text links cannot have foreground color;
• Pressing "Tab" inserts 4 spaces, instead of a real tab;
• Performance issues - Segment layouts could not be cached, which means that their redrawing is very slow.

Task requirements

• Modify the layout basics, so that:
  • Tab will be functional;
  • Future features (hyphenation, spell check, links foreground) will be achievable;
  • Performance will not degrade. If possible, it should be improved.
• In the design section, describe:
  • What changes will be made to the layout mechanism;
  • What causes theses changes, what will the effect be;
• In the implementation, describe:
  • Implementation idea for hyphenation;
  • Implementation idea for spell check and foreground highlighting.

Task result

Source code, basics for the tasks mentioned.

Implementation idea

Drop TextLayout, LineBreakMeasurer and AttributedCharacterIterator - use Font instead. This will allow deleting of most of the HotSegmentLayout contents. Several utility methods will also be deleted. Hooray :)

Related

TEXT_LAYOUT_LAZY.

How to demo

Play around with a text frame - show affine transforms, wrapping modes, chaining, navigation, etc.

Design

^{(Describe your design here.)}

Implementation

^{(Describe and link the implementation results here (from the wiki or the repository).)}

Testing

^{(Place the testing results here.)}

Comments

^{(Write comments for this or later revisions here.)}