IDML Filter: improve the styles of unstyled elements at the beginning of a story

[Denis Konovalyenko]

Unstyled child elements, when they appear at the beginning of a story, obtain the style ranges of the first sibling with specified style ranges. For instance, the [No HTS, n paragraph style, n character style] content from the snippet below

  <Story Self="ue8" AppliedTOCStyle="n" TrackChanges="false" StoryTitle="$ID/" AppliedNamedGrid="n">
    <StoryPreference OpticalMarginAlignment="false" OpticalMarginSize="12" FrameType="TextFrameType"
                     StoryOrientation="Horizontal" StoryDirection="LeftToRightDirection"/>
    <InCopyExportOption IncludeGraphicProxies="true" IncludeAllResources="false"/>
    <Content>[No HTS, n paragraph style, n character style]</Content>
    <Br/>
    <ParagraphStyleRange AppliedParagraphStyle="ParagraphStyle/Paragraph Style 1" LeftIndent="18"
                         FirstLineIndent="-18" BulletsAndNumberingListType="NumberedList">
      <Content>[No HTS, Paragraph Style 1, n character style]</Content>
      <Br/>
      <CharacterStyleRange AppliedCharacterStyle="CharacterStyle/Hyperlink" Underline="false">
        <HyperlinkTextSource Self="u106" Name="http://hyperlink-1.net 1" Hidden="false"
                             AppliedCharacterStyle="n">
          <Content>http://hyperlink-1-0.net[n character style on HyperlinkTextSource]</Content>
          <CharacterStyleRange AppliedCharacterStyle="CharacterStyle/Character Style 1">
            <Content>[Character style 1]</Content>
            <Br/>
          </CharacterStyleRange>
        </HyperlinkTextSource>
      </CharacterStyleRange>

is rendered with

<ParagraphStyleRange AppliedParagraphStyle="ParagraphStyle/Paragraph Style 1" LeftIndent="18"
                         FirstLineIndent="-18" BulletsAndNumberingListType="NumberedList">
      <CharacterStyleRange AppliedCharacterStyle="CharacterStyle/$ID/[No character style]">

styles.

Here is a related UI:

‌

With the pull request #669 changes the output looks like that:

   <ParagraphStyleRange AppliedParagraphStyle="ParagraphStyle/$ID/NormalParagraphStyle">
      <CharacterStyleRange AppliedCharacterStyle="CharacterStyle/$ID/[No character style]">
        <Content xml:space="preserve">[No HTS, n paragraph style, n character style]</Content>
        <Br/>
      </CharacterStyleRange>
    </ParagraphStyleRange>
    <ParagraphStyleRange AppliedParagraphStyle="ParagraphStyle/Paragraph Style 1"
                         BulletsAndNumberingListType="NumberedList" FirstLineIndent="-18"
                         LeftIndent="18">
      <CharacterStyleRange AppliedCharacterStyle="CharacterStyle/$ID/[No character style]">
        <Content xml:space="preserve">[No HTS, Paragraph Style 1, n character style]</Content>
        <Br/>
      </CharacterStyleRange>

UI:

‌

A related document can be found attached.