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How does the Unicode Bidi CSS property work?
The unicode-bidi CSS property, together with the direction property, determines how bidirectional text in a document is handled. For example, if a block of content contains both left-to-right and right-to-left text, the user-agent uses a complex Unicode algorithm to decide how to display the text.
How does the isolate keyword work in Bidi CSS?
This keyword applies the isolation behavior of the isolate keyword to the surrounding content and the override behavior of the bidi-override keyword to the inner content. This keyword makes the elements directionality calculated without considering its parent bidirectional state or the value of the direction property.
How does implicit reordering work in Bidi CSS?
For inline elements, implicit reordering works across element boundaries. If the element is inline, this value opens an additional level of embedding with respect to the bidirectional algorithm. The direction of this embedding level is given by the direction property. For inline elements this creates an override.
How does Bidi override work in Adobe Acrobat?
the “bidi-override” keyword, which acts the same as “embed” when applied to inline elements. On block-level elements, it overrides the browser’s bi-directional text algorithm and flows the text inside any inline children strictly according to the direction property.
How is bidirectional text read in Unicode spec?
A little-understood corner of Unicode is its handling for bidirectional text (The spec is a little dry). While English languages are read left-to-right, plenty of scripts (notably Arabic and Hebrew) are read from right to left.
How are left to right embeddings used in Unicode?
Left-to-Right Embedding (U+202A, LRE) and Right-to-Left Embedding (U+202B, RLE) are used to mark a block of text as having a direction, much like the overall document direction. This then affects Weak characters at the boundaries which would have otherwise taken direction from the document.
Can a LRM be inserted before a bidi character?
Because they are strongly-typed characters, they extend or break the ranges established by default by the bidi algorithm. In the example above, we need to tell the bidi algorithm that the 5 is part of the LTR text. To do that, we can insert an LRM character before it.