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Analysis

Overview

• See WRAPPING_TEXT_RENDERING_R0

Task requirements

• Add basic text wrapping around a Frame with a higher z-order than the current Frame.
• Text will be flowed line by line following the example:

• Wrapping options
  • none - text is not wrapped
  • before - text wraps only on the left side
  • after - text wraps only on the right side
  • parallel (default) - text wraps from both sides
  • Default option (parallel).
• In this revision only the parallel will be implemented. However the others remains optional.

Task result

The result of this task is source code.

Implementation idea

• The text layout is based on HillClimbing algorithm.
• Flowing text not only to a single area, but also to a list of areas (having different shapes) is available.
• From the area of the current Frame subtract all intersecting Frames' areas and produce a list of areas.
• Pass the list to the algorithm.

Related

WRAPPING_TEXT_RENDERING_R0

How to demo

See WRAPPING_TEXT_RENDERING_R0

Design

• Modify HotTextSceneElementImpl.testLayout() method to:
  • Consider if the current Frame has single selection, so that wrapping is disabled (the user should be able to edit the selected frame without wrapping).
  • Get all present FrameViews in the PageWorkArea. For each of them:
    • Convert its space to the space of the current Frame.
    • Get its ImmArea relative to the space of the current Frame.
    • Subtract the current Frame's area from its ImmArea.
  • Use the calculated ImmArea (possibly containing a complex shape) as a parameter to HotTextLayout.layout
• Correct EdgeKind.OPEN_LINE and EdgeKind.SEGMENT to consider the case of more than one segment on a line.
  • BasePoint calculation should be corrected
• Testing: Use the ​TextDemo and try:
  • Type some text into the first frame.
  • Select the second frame -> the text in the first wraps around.
  • Move and/or rotate the second frame -> the text in the first wraps around.

Implementation

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Testing

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Comments

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