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<pre wrap="">Hi, Alexey,
When you say "XEP doesn't insert white-space characters in the PDF
output" do you mean it does not do it for CJK only or never? This sounds
strange because if I have an English text I see the space character
preserved. But if the same space character occurs inside CJK it
disappears.
I am not sure I agree with your reason. WordSpacing is not a replacement
for whitespace character. It is an addition. The spec first discusses
character spacing and it states explicitly that character spacing is *an
additional* space added to the character:
When the glyph for each character in the string is rendered, Tc
is
<b class="moz-txt-star"><span class="moz-txt-tag">*</span>added<span
class="moz-txt-tag">*</span></b> to the horizontal or vertical component of the glyph's
displacement.
Then they say the word spacing works exactly like character spacing by
only applies to space char (byte 32). And the default value is 0.
Furthermore, the note for Tw explicitly stipulates that Tw is not
applied when byte 32 occurs inside multi-byte characters:
It [Tw] does not apply to occurrences of the byte value 32 in
multiplebyte codes.
If you look at the actual sample from the refernce you will see that
there is actually a space character there but when Tw is not 0 it
appears larger.
I belive Adobe Reader behaves correctly ignoring Tw when inside
multibyte Japanese string.
I belive Renderex should not drop actual space character.</pre>
Thanks<br>
<br>
Alexei Gagarinov wrote:
<blockquote cite="mid818745989.20061114162639@renderx.com" type="cite">
<pre wrap="">Hi Volodymyr,
XEP doesn't insert white-space characters in the PDF output. It
absolutely positions text chunks. The reason for that is the
following: word spacing in PDF applies only to code 32 character; for
details, see PDF Reference, section 5.2.2 Word Spacing.
It seems that Acrobat incorrectly handles absolutely positioned text
chunks with CJK characters.
Acrobat Distiller inserts white-space characters in the PDF text
explicitly.
Alexei Gagarinov
RenderX
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</pre>
</blockquote>
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