Stores the paragraph and character formatting information for CRichText .

iParaIx stores the paragraph formatting, one entry per paragraph. Paragraphs are pieces of text delimited by the Unicode Paragraph Delimiter character U+2029.

iPhraseIx stores the character formatting.

Paragraph formatting information can be shared or not shared between paragraphs. Sharing is only permitted for paragraphs that do not have any character formatting applied to their text.

A phrase is a run of consistently formatted characters. A phrase may only contain a paragraph delimiter in its last character. In other words, phrases are not permitted to span paragraph boundaries.

iPhraseIx only stores formatting for the non-shared paragraphs. Therefore adding up the lengths of all the phrases in iPhraseIx will yield the sum of the non-shared paragraphs stored in iParaIx.

Note that the "nominal" paragraph delimiter at the end of the text which is not stored by CRichText is covered by both character and paragraph formatting. So the length of the final paragraph and final phrase (if appropriate) includes this character.