Hi Jonathan, I am using xetex/xelatex for typesetting of devanagari texts. eg. http://sanskritdocuments.org/doc_devii/gangAShTakamkAlidAsa.pdf http://sanskritdocuments.org/doc_devii/gangAShTakamkAlidAsa.html?lang=sa (HTML TEXT version of the same)
However, when the devanagri text is copied from the pdf, it does not display correctly - which is the case with complex scripts with most pdf creators (as far as I know). eg. ॥ गङ्गाष्टकं कालिदासकृतम् ॥ is displayed as ॥ गाकं कािलदासकृतम ॥ Is it possible to add a feature to xetex to support search and copy of complex script text in scripts such as devanagari? It would really be great to have this "coming soon to a XeTeX near you"....... :-) Thanks. ShreeDevi ____________________________________________________________ भजन - कीर्तन - आरती @ http://bhajans.ramparivar.com On Thu, Feb 18, 2016 at 4:28 PM, Jonathan Kew <jfkth...@gmail.com> wrote: > This is a pretty specialized feature, likely to be interest only to a > small minority of users. But for those it concerns, here's something that > is > > "coming soon to a XeTeX near you"....... > > > I've recently implemented a new feature, controlled by the integer > parameter \XeTeXinterwordspaceshaping. This will be available in the TL'16 > release, if all goes well. > > This feature is relevant only when using OpenType/Graphite/AAT fonts, not > legacy .tfm-based fonts. > > When \XeTeXinterwordspaceshaping is greater than 0, XeTeX will attempt to > support fonts where the width of inter-word spaces may vary contextually, > depending on the preceding and following text. This is needed by fonts such > as SIL's Awami Nastaliq (in development) where words are expected to kern > together across spaces. > > The default behavior of xetex is to measure each word in isolation, and > simply string together a sequence of such word and space (glue) nodes to > form the horizontal list that is then line-broken to form a paragraph. > Normally, when inter-word spaces do not depend on the adjacent words, this > works fine; but in Awami the width of inter-word spaces may vary > drastically, even becoming negative in some cases. > > Setting \XeTeXinterwordspaceshaping=1 tells xetex to measure such spaces > "in context" and take account of the contextually-modified widths during > line breaking. This greatly improves the typeset result with such a font. > Each word is still shaped and rendered individually, but line-breaking and > word spacing respects the inter-word kerning. > > A further complication occurs when not only the width of the space but > also the glyphs of the adjacent words themselves may be subject to > contextual changes. An example of this would be a font that has OpenType > ligature rules that apply to multiple-word sequences; e.g. a symbol font > that ligates the text "credit card" to render a credit-card icon. Another > example is the word-final swash forms in Hoefler Italic, which are intended > to be used at end-of-line but NOT before word spaces within the line. > > These cases are addressed with \XeTeXinterwordspaceshaping=2. With this > value, not only are inter-word spaces measured in context, but also each > run of text (words and intervening spaces) in a single font will be > re-shaped as a unit at \shipout time. This allows full shaping (contextual > swashes, ligatures, etc) to take effect across inter-word spaces. > > Currently, this feature is implemented only in the "contextual-space" > branch of the code at sourceforge; anyone interested in testing it will > need to check out and build the code from there. After some time, if no > major problems show up, I expect to merge it to the master branch, and then > to the TeXLive source tree. > > Feedback welcome.......... > > JK > > > > -------------------------------------------------- > Subscriptions, Archive, and List information, etc.: > http://tug.org/mailman/listinfo/xetex >
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