Fonthandling/protrusion question: handling of left margin

Fonthandling/protrusion question: handling of left margin

[Rob Heusdens]

Short question about the font feature protrusion. This handles certain
characters that get shifted into the right margin to make a more visable
straight right margin. But can this font feature also handle left margin?
For example, sentences that start in the left margin and begin with a
quotation, there you would want the same effect also in the left margin.
I currently use \kern-1ex to achieve the same effect for a sentence that
commences on the left margin and starts with a quotation.

Greetings,

Rob

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Re: Fonthandling/protrusion question: handling of left margin

[Hans Hagen]

On 7/18/2014 1:11 PM, Rob Heusdens wrote:
> Short question about the font feature protrusion. This handles certain
> characters that get shifted into the right margin to make a more visable
> straight right margin. But can this font feature also handle left margin?
> For example, sentences that start in the left margin and begin with a
> quotation, there you would want the same effect also in the left margin.
> I currently use \kern-1ex to achieve the same effect for a sentence that
> commences on the left margin and starts with a quotation.

\setupfontprotrusion[mine][vector=quality,right=10,left=40]
\definefontfeature[default][default][protrusion=mine]
\setupalign[hanging]

\showframe

\starttext
     \input tufte
\stoptext

... wondering why only the first and last line

Hans

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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
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                                              | www.pragma-pod.nl
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Re: Fonthandling/protrusion question: handling of left margin

[Wolfgang Schuster]

Am 18.07.2014 um 14:37 schrieb Hans Hagen <pragma@wxs.nl>:

> On 7/18/2014 1:11 PM, Rob Heusdens wrote:
>> Short question about the font feature protrusion. This handles certain
>> characters that get shifted into the right margin to make a more visable
>> straight right margin. But can this font feature also handle left margin?
>> For example, sentences that start in the left margin and begin with a
>> quotation, there you would want the same effect also in the left margin.
>> I currently use \kern-1ex to achieve the same effect for a sentence that
>> commences on the left margin and starts with a quotation.
> 
> \setupfontprotrusion[mine][vector=quality,right=10,left=40]
> \definefontfeature[default][default][protrusion=mine]
> \setupalign[hanging]
> 
> \showframe
> 
> \starttext
>    \input tufte
> \stoptext
> 
> ... wondering why only the first and last line

On the first and last line are shifted because you don’t have protrusion values for letters
at the begin of the other lines as can be seen in this table (from font-ext.lua):

vectors['alpha'] = {

    [byte("A")] = { .05, .05 },
    [byte("F")] = {   0, .05 },
    [byte("J")] = { .05,   0 },
    [byte("K")] = {   0, .05 },
    [byte("L")] = {   0, .05 },
    [byte("T")] = { .05, .05 },
    [byte("V")] = { .05, .05 },
    [byte("W")] = { .05, .05 },
    [byte("X")] = { .05, .05 },
    [byte("Y")] = { .05, .05 },

    [byte("k")] = {   0, .05 },
    [byte("r")] = {   0, .05 },
    [byte("t")] = {   0, .05 },
    [byte("v")] = { .05, .05 },
    [byte("w")] = { .05, .05 },
    [byte("x")] = { .05, .05 },
    [byte("y")] = { .05, .05 },

}

Wolfgang
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Re: Fonthandling/protrusion question: handling of left margin

[Hans Hagen]

On 7/18/2014 2:52 PM, Wolfgang Schuster wrote:
>
> Am 18.07.2014 um 14:37 schrieb Hans Hagen <pragma@wxs.nl>:
>
>> On 7/18/2014 1:11 PM, Rob Heusdens wrote:
>>> Short question about the font feature protrusion. This handles certain
>>> characters that get shifted into the right margin to make a more visable
>>> straight right margin. But can this font feature also handle left margin?
>>> For example, sentences that start in the left margin and begin with a
>>> quotation, there you would want the same effect also in the left margin.
>>> I currently use \kern-1ex to achieve the same effect for a sentence that
>>> commences on the left margin and starts with a quotation.
>>
>> \setupfontprotrusion[mine][vector=quality,right=10,left=40]
>> \definefontfeature[default][default][protrusion=mine]
>> \setupalign[hanging]
>>
>> \showframe
>>
>> \starttext
>>     \input tufte
>> \stoptext
>>
>> ... wondering why only the first and last line
>
> On the first and last line are shifted because you don’t have protrusion values for letters
> at the begin of the other lines as can be seen in this table (from font-ext.lua):
>
> vectors['alpha'] = {
>
>      [byte("A")] = { .05, .05 },
>      [byte("F")] = {   0, .05 },
>      [byte("J")] = { .05,   0 },
>      [byte("K")] = {   0, .05 },
>      [byte("L")] = {   0, .05 },
>      [byte("T")] = { .05, .05 },
>      [byte("V")] = { .05, .05 },
>      [byte("W")] = { .05, .05 },
>      [byte("X")] = { .05, .05 },
>      [byte("Y")] = { .05, .05 },
>
>      [byte("k")] = {   0, .05 },
>      [byte("r")] = {   0, .05 },
>      [byte("t")] = {   0, .05 },
>      [byte("v")] = { .05, .05 },
>      [byte("w")] = { .05, .05 },
>      [byte("x")] = { .05, .05 },
>      [byte("y")] = { .05, .05 },
>
> }

ah, yes, those tables are probably flushed from my memory by now

Hans

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                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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Re: Fonthandling/protrusion question: handling of left margin

[Wolfgang Schuster]

Am 18.07.2014 um 14:57 schrieb Hans Hagen <pragma@wxs.nl>:

> On 7/18/2014 2:52 PM, Wolfgang Schuster wrote:
>> 
>> Am 18.07.2014 um 14:37 schrieb Hans Hagen <pragma@wxs.nl>:
>> 
>>> On 7/18/2014 1:11 PM, Rob Heusdens wrote:
>>>> Short question about the font feature protrusion. This handles certain
>>>> characters that get shifted into the right margin to make a more visable
>>>> straight right margin. But can this font feature also handle left margin?
>>>> For example, sentences that start in the left margin and begin with a
>>>> quotation, there you would want the same effect also in the left margin.
>>>> I currently use \kern-1ex to achieve the same effect for a sentence that
>>>> commences on the left margin and starts with a quotation.
>>> 
>>> \setupfontprotrusion[mine][vector=quality,right=10,left=40]
>>> \definefontfeature[default][default][protrusion=mine]
>>> \setupalign[hanging]
>>> 
>>> \showframe
>>> 
>>> \starttext
>>>    \input tufte
>>> \stoptext
>>> 
>>> ... wondering why only the first and last line
>> 
>> On the first and last line are shifted because you don’t have protrusion values for letters
>> at the begin of the other lines as can be seen in this table (from font-ext.lua):
>> 
>> vectors['alpha'] = {
>> 
>>     [byte("A")] = { .05, .05 },
>>     [byte("F")] = {   0, .05 },
>>     [byte("J")] = { .05,   0 },
>>     [byte("K")] = {   0, .05 },
>>     [byte("L")] = {   0, .05 },
>>     [byte("T")] = { .05, .05 },
>>     [byte("V")] = { .05, .05 },
>>     [byte("W")] = { .05, .05 },
>>     [byte("X")] = { .05, .05 },
>>     [byte("Y")] = { .05, .05 },
>> 
>>     [byte("k")] = {   0, .05 },
>>     [byte("r")] = {   0, .05 },
>>     [byte("t")] = {   0, .05 },
>>     [byte("v")] = { .05, .05 },
>>     [byte("w")] = { .05, .05 },
>>     [byte("x")] = { .05, .05 },
>>     [byte("y")] = { .05, .05 },
>> 
>> }
> 
> ah, yes, those tables are probably flushed from my memory by now

BTW, is it intended that protrusion doesn’t work for indented lines?

\setupfontprotrusion[mine][vector=punctuation,left=2]
\definefontfeature[default][default][protrusion=mine]

\setupalign[hanging]

\starttext

“Text”

Text

\blank \setupindenting[yes,medium]

“Text”

Text

\stoptext

Wolfgang
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Re: Fonthandling/protrusion question: handling of left margin

[Hans Hagen]

On 7/18/2014 3:10 PM, Wolfgang Schuster wrote:
>
> Am 18.07.2014 um 14:57 schrieb Hans Hagen <pragma@wxs.nl>:
>
>> On 7/18/2014 2:52 PM, Wolfgang Schuster wrote:
>>>
>>> Am 18.07.2014 um 14:37 schrieb Hans Hagen <pragma@wxs.nl>:
>>>
>>>> On 7/18/2014 1:11 PM, Rob Heusdens wrote:
>>>>> Short question about the font feature protrusion. This handles certain
>>>>> characters that get shifted into the right margin to make a more visable
>>>>> straight right margin. But can this font feature also handle left margin?
>>>>> For example, sentences that start in the left margin and begin with a
>>>>> quotation, there you would want the same effect also in the left margin.
>>>>> I currently use \kern-1ex to achieve the same effect for a sentence that
>>>>> commences on the left margin and starts with a quotation.
>>>>
>>>> \setupfontprotrusion[mine][vector=quality,right=10,left=40]
>>>> \definefontfeature[default][default][protrusion=mine]
>>>> \setupalign[hanging]
>>>>
>>>> \showframe
>>>>
>>>> \starttext
>>>>     \input tufte
>>>> \stoptext
>>>>
>>>> ... wondering why only the first and last line
>>>
>>> On the first and last line are shifted because you don’t have protrusion values for letters
>>> at the begin of the other lines as can be seen in this table (from font-ext.lua):
>>>
>>> vectors['alpha'] = {
>>>
>>>      [byte("A")] = { .05, .05 },
>>>      [byte("F")] = {   0, .05 },
>>>      [byte("J")] = { .05,   0 },
>>>      [byte("K")] = {   0, .05 },
>>>      [byte("L")] = {   0, .05 },
>>>      [byte("T")] = { .05, .05 },
>>>      [byte("V")] = { .05, .05 },
>>>      [byte("W")] = { .05, .05 },
>>>      [byte("X")] = { .05, .05 },
>>>      [byte("Y")] = { .05, .05 },
>>>
>>>      [byte("k")] = {   0, .05 },
>>>      [byte("r")] = {   0, .05 },
>>>      [byte("t")] = {   0, .05 },
>>>      [byte("v")] = { .05, .05 },
>>>      [byte("w")] = { .05, .05 },
>>>      [byte("x")] = { .05, .05 },
>>>      [byte("y")] = { .05, .05 },
>>>
>>> }
>>
>> ah, yes, those tables are probably flushed from my memory by now
>
> BTW, is it intended that protrusion doesn’t work for indented lines?
>
> \setupfontprotrusion[mine][vector=punctuation,left=2]
> \definefontfeature[default][default][protrusion=mine]
>
> \setupalign[hanging]
>
> \starttext
>
> “Text”
>
> Text
>
> \blank \setupindenting[yes,medium]
>
> “Text”
>
> Text
>
> \stoptext

probably intended (not sure about hanging)

Hans

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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Re: Fonthandling/protrusion question: handling of left margin

[Jan Tosovsky]

On 2014-07-18 Hans Hagen wrote:
> On 7/18/2014 3:10 PM, Wolfgang Schuster wrote:
> >
> > BTW, is it intended that protrusion doesn't work for indented lines?
> >
> > \setupfontprotrusion[mine][vector=punctuation,left=2]
> > \definefontfeature[default][default][protrusion=mine]
> >
> > \setupalign[hanging]
> >
> > \starttext
> >
> > "Text"
> >
> > Text
> >
> > \blank \setupindenting[yes,medium]
> >
> > "Text"
> >
> > Text
> >
> > \stoptext
> 
> probably intended (not sure about hanging)

I've reported something related some time ago:
http://tracker.luatex.org/view.php?id=884

Jan

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