Does expl3 have alternative to settowidth and settoheight?Is there a gentle introduction to learning expl3 syntaxEmulating @ifnextchar in expl3expl3 code with tabularxDoes expl3 have arrays?Access xparse's BooleanTrue via latex3 expl3Does expl3 key-setting syntax have an equivalent of TikZ/PGF's .cd?expl3 function not expanded inside `label…`Determining the length of an expl3 sequenceHow to test a newif conditional in expl3Locally redefining ~ in code that uses expl3 facilities
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Does expl3 have alternative to settowidth and settoheight?
Is there a gentle introduction to learning expl3 syntaxEmulating @ifnextchar in expl3expl3 code with tabularxDoes expl3 have arrays?Access xparse's BooleanTrue via latex3 expl3Does expl3 key-setting syntax have an equivalent of TikZ/PGF's .cd?expl3 function not expanded inside `label…`Determining the length of an expl3 sequenceHow to test a newif conditional in expl3Locally redefining ~ in code that uses expl3 facilities
How can I substitute following code with expl3 interfaces (that do the same job)?
documentclass[varwidth]standalone
begindocument
newlengthspaceWidth
settowidthspaceWidth
thespaceWidth
enddocument
expl3 latex3 lengths
asked May 23 at 23:50
bp2017bp2017
1,234316
add a comment |
How can I substitute following code with expl3 interfaces (that do the same job)?
documentclass[varwidth]standalone
begindocument
newlengthspaceWidth
settowidthspaceWidth
thespaceWidth
enddocument
expl3 latex3 lengths
asked May 23 at 23:50
bp2017bp2017
1,234316
1
your question title is about measuring boxes but if your actual goal is the example in the code then this is a very inefficient way to find the width of a space, that width is already available as a tex length it is fontdimen 2 of the current font.
– David Carlisle
May 24 at 6:45
add a comment |
How can I substitute following code with expl3 interfaces (that do the same job)?
documentclass[varwidth]standalone
begindocument
newlengthspaceWidth
settowidthspaceWidth
thespaceWidth
enddocument
expl3 latex3 lengths
asked May 23 at 23:50
bp2017bp2017
1,234316
How can I substitute following code with expl3 interfaces (that do the same job)?
documentclass[varwidth]standalone
begindocument
newlengthspaceWidth
settowidthspaceWidth
thespaceWidth
enddocument
expl3 latex3 lengths
expl3 latex3 lengths
asked May 23 at 23:50
bp2017bp2017
1,234316
asked May 23 at 23:50
bp2017bp2017
1,234316
asked May 23 at 23:50
bp2017bp2017
1,234316
asked May 23 at 23:50
bp2017bp2017
1,234316
asked May 23 at 23:50
bp2017bp2017
1,234316
1,234316
1
your question title is about measuring boxes but if your actual goal is the example in the code then this is a very inefficient way to find the width of a space, that width is already available as a tex length it is fontdimen 2 of the current font.
– David Carlisle
May 24 at 6:45
add a comment |
1
your question title is about measuring boxes but if your actual goal is the example in the code then this is a very inefficient way to find the width of a space, that width is already available as a tex length it is fontdimen 2 of the current font.
– David Carlisle
May 24 at 6:45
1
1
your question title is about measuring boxes but if your actual goal is the example in the code then this is a very inefficient way to find the width of a space, that width is already available as a tex length it is fontdimen 2 of the current font.
– David Carlisle
May 24 at 6:45
your question title is about measuring boxes but if your actual goal is the example in the code then this is a very inefficient way to find the width of a space, that width is already available as a tex length it is fontdimen 2 of the current font.
– David Carlisle
May 24 at 6:45
add a comment |
2 Answers
2
active
oldest
votes
There is nothing equivalent (that I know of), but you can implement your own (and by implement I mean copy from latex.ltx and change the syntax). I defined SetToHeight, SetToWidth, and SetToDepth, that do the same as the LaTeX2e's variants.
However, for the specific case of a space, you can use fontdimen2font, which will get the width of a space in the current font without the need to measure a box, thus it is expandable, so you can use in dimension expressions. I defined an expl3y wrapper for that as well:
documentclass[varwidth]standalone
usepackageexpl3
ExplSyntaxOn
box_new:N l_bp_set_to_box
cs_new_protected:Npn bp_box_set_to:NNn #1 #2 #3
hbox_set:Nn l_bp_set_to_box #3
dim_set:Nn #2 #1 l_bp_set_to_box
box_set_eq:NN l_bp_set_to_box c_empty_box
cs_new_protected:Npn bp_set_to_height:Nn bp_box_set_to:NNn box_ht:N
cs_new_protected:Npn bp_set_to_depth:Nn bp_box_set_to:NNn box_dp:N
cs_new_protected:Npn bp_set_to_width:Nn bp_box_set_to:NNn box_wd:N
% Expandable width of a space:
cs_new:Npn WidthOfSpace tex_fontdimen:D 2 tex_font:D
ExplSyntaxOff
begindocument
ExplSyntaxOn
dim_new:N spaceWidth
bp_set_to_width:Nn spaceWidth
dim_use:N spaceWidth
par
dim_use:N WidthOfSpace
ExplSyntaxOff
enddocument
Output:
answered May 24 at 0:18
Phelype OleinikPhelype Oleinik
28.6k64894
Why__? These would need to be public
– Joseph Wright♦
May 24 at 6:06
1
I wouldn't usel_tmpa_box.
– egreg
May 24 at 6:24
@JosephWright Only theSetToSomething, no? Why does__bp_box_set_to:NNnneed to be public?
– Phelype Oleinik
May 24 at 9:00
@PhelypeOleinik Because of the document/code level split: all document commands should be defined in terms of documented code-level ones.
– Joseph Wright♦
May 24 at 9:13
1
@PhelypeOleinik Model is: document command defines user interface, this is implemented by code-level commands which startmodule_...(so should be documented), and then they can use__module...commands which are internal and thus 'no use'.
– Joseph Wright♦
May 24 at 9:20
|
show 1 more comment
coffin_new:NspaceCoffin
hcoffin_set:NnspaceCoffin
% space width
dim_eval:ncoffin_wd:NspaceCoffin
box_new:NspaceBox
hbox_set:NnspaceBox
% space width
dim_eval:nbox_wd:NspaceBox
answered May 24 at 0:13
bp2017bp2017
1,234316
2
You can, sure, use a coffin, however the computational overhead is much larger than for a simple box (as you edited in just now :-)
– Phelype Oleinik
May 24 at 0:23
add a comment |
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2 Answers
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2 Answers
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There is nothing equivalent (that I know of), but you can implement your own (and by implement I mean copy from latex.ltx and change the syntax). I defined SetToHeight, SetToWidth, and SetToDepth, that do the same as the LaTeX2e's variants.
However, for the specific case of a space, you can use fontdimen2font, which will get the width of a space in the current font without the need to measure a box, thus it is expandable, so you can use in dimension expressions. I defined an expl3y wrapper for that as well:
documentclass[varwidth]standalone
usepackageexpl3
ExplSyntaxOn
box_new:N l_bp_set_to_box
cs_new_protected:Npn bp_box_set_to:NNn #1 #2 #3
hbox_set:Nn l_bp_set_to_box #3
dim_set:Nn #2 #1 l_bp_set_to_box
box_set_eq:NN l_bp_set_to_box c_empty_box
cs_new_protected:Npn bp_set_to_height:Nn bp_box_set_to:NNn box_ht:N
cs_new_protected:Npn bp_set_to_depth:Nn bp_box_set_to:NNn box_dp:N
cs_new_protected:Npn bp_set_to_width:Nn bp_box_set_to:NNn box_wd:N
% Expandable width of a space:
cs_new:Npn WidthOfSpace tex_fontdimen:D 2 tex_font:D
ExplSyntaxOff
begindocument
ExplSyntaxOn
dim_new:N spaceWidth
bp_set_to_width:Nn spaceWidth
dim_use:N spaceWidth
par
dim_use:N WidthOfSpace
ExplSyntaxOff
enddocument
Output:
answered May 24 at 0:18
Phelype OleinikPhelype Oleinik
28.6k64894
Why__? These would need to be public
– Joseph Wright♦
May 24 at 6:06
1
I wouldn't usel_tmpa_box.
– egreg
May 24 at 6:24
@JosephWright Only theSetToSomething, no? Why does__bp_box_set_to:NNnneed to be public?
– Phelype Oleinik
May 24 at 9:00
@PhelypeOleinik Because of the document/code level split: all document commands should be defined in terms of documented code-level ones.
– Joseph Wright♦
May 24 at 9:13
1
@PhelypeOleinik Model is: document command defines user interface, this is implemented by code-level commands which startmodule_...(so should be documented), and then they can use__module...commands which are internal and thus 'no use'.
– Joseph Wright♦
May 24 at 9:20
|
show 1 more comment
There is nothing equivalent (that I know of), but you can implement your own (and by implement I mean copy from latex.ltx and change the syntax). I defined SetToHeight, SetToWidth, and SetToDepth, that do the same as the LaTeX2e's variants.
However, for the specific case of a space, you can use fontdimen2font, which will get the width of a space in the current font without the need to measure a box, thus it is expandable, so you can use in dimension expressions. I defined an expl3y wrapper for that as well:
documentclass[varwidth]standalone
usepackageexpl3
ExplSyntaxOn
box_new:N l_bp_set_to_box
cs_new_protected:Npn bp_box_set_to:NNn #1 #2 #3
hbox_set:Nn l_bp_set_to_box #3
dim_set:Nn #2 #1 l_bp_set_to_box
box_set_eq:NN l_bp_set_to_box c_empty_box
cs_new_protected:Npn bp_set_to_height:Nn bp_box_set_to:NNn box_ht:N
cs_new_protected:Npn bp_set_to_depth:Nn bp_box_set_to:NNn box_dp:N
cs_new_protected:Npn bp_set_to_width:Nn bp_box_set_to:NNn box_wd:N
% Expandable width of a space:
cs_new:Npn WidthOfSpace tex_fontdimen:D 2 tex_font:D
ExplSyntaxOff
begindocument
ExplSyntaxOn
dim_new:N spaceWidth
bp_set_to_width:Nn spaceWidth
dim_use:N spaceWidth
par
dim_use:N WidthOfSpace
ExplSyntaxOff
enddocument
Output:
answered May 24 at 0:18
Phelype OleinikPhelype Oleinik
28.6k64894
Why__? These would need to be public
– Joseph Wright♦
May 24 at 6:06
1
I wouldn't usel_tmpa_box.
– egreg
May 24 at 6:24
@JosephWright Only theSetToSomething, no? Why does__bp_box_set_to:NNnneed to be public?
– Phelype Oleinik
May 24 at 9:00
@PhelypeOleinik Because of the document/code level split: all document commands should be defined in terms of documented code-level ones.
– Joseph Wright♦
May 24 at 9:13
1
@PhelypeOleinik Model is: document command defines user interface, this is implemented by code-level commands which startmodule_...(so should be documented), and then they can use__module...commands which are internal and thus 'no use'.
– Joseph Wright♦
May 24 at 9:20
|
show 1 more comment
There is nothing equivalent (that I know of), but you can implement your own (and by implement I mean copy from latex.ltx and change the syntax). I defined SetToHeight, SetToWidth, and SetToDepth, that do the same as the LaTeX2e's variants.
However, for the specific case of a space, you can use fontdimen2font, which will get the width of a space in the current font without the need to measure a box, thus it is expandable, so you can use in dimension expressions. I defined an expl3y wrapper for that as well:
documentclass[varwidth]standalone
usepackageexpl3
ExplSyntaxOn
box_new:N l_bp_set_to_box
cs_new_protected:Npn bp_box_set_to:NNn #1 #2 #3
hbox_set:Nn l_bp_set_to_box #3
dim_set:Nn #2 #1 l_bp_set_to_box
box_set_eq:NN l_bp_set_to_box c_empty_box
cs_new_protected:Npn bp_set_to_height:Nn bp_box_set_to:NNn box_ht:N
cs_new_protected:Npn bp_set_to_depth:Nn bp_box_set_to:NNn box_dp:N
cs_new_protected:Npn bp_set_to_width:Nn bp_box_set_to:NNn box_wd:N
% Expandable width of a space:
cs_new:Npn WidthOfSpace tex_fontdimen:D 2 tex_font:D
ExplSyntaxOff
begindocument
ExplSyntaxOn
dim_new:N spaceWidth
bp_set_to_width:Nn spaceWidth
dim_use:N spaceWidth
par
dim_use:N WidthOfSpace
ExplSyntaxOff
enddocument
Output:
answered May 24 at 0:18
Phelype OleinikPhelype Oleinik
28.6k64894
There is nothing equivalent (that I know of), but you can implement your own (and by implement I mean copy from latex.ltx and change the syntax). I defined SetToHeight, SetToWidth, and SetToDepth, that do the same as the LaTeX2e's variants.
However, for the specific case of a space, you can use fontdimen2font, which will get the width of a space in the current font without the need to measure a box, thus it is expandable, so you can use in dimension expressions. I defined an expl3y wrapper for that as well:
documentclass[varwidth]standalone
usepackageexpl3
ExplSyntaxOn
box_new:N l_bp_set_to_box
cs_new_protected:Npn bp_box_set_to:NNn #1 #2 #3
hbox_set:Nn l_bp_set_to_box #3
dim_set:Nn #2 #1 l_bp_set_to_box
box_set_eq:NN l_bp_set_to_box c_empty_box
cs_new_protected:Npn bp_set_to_height:Nn bp_box_set_to:NNn box_ht:N
cs_new_protected:Npn bp_set_to_depth:Nn bp_box_set_to:NNn box_dp:N
cs_new_protected:Npn bp_set_to_width:Nn bp_box_set_to:NNn box_wd:N
% Expandable width of a space:
cs_new:Npn WidthOfSpace tex_fontdimen:D 2 tex_font:D
ExplSyntaxOff
begindocument
ExplSyntaxOn
dim_new:N spaceWidth
bp_set_to_width:Nn spaceWidth
dim_use:N spaceWidth
par
dim_use:N WidthOfSpace
ExplSyntaxOff
enddocument
Output:
answered May 24 at 0:18
Phelype OleinikPhelype Oleinik
28.6k64894
edited May 24 at 9:32
answered May 24 at 0:18
Phelype OleinikPhelype Oleinik
28.6k64894
answered May 24 at 0:18
Phelype OleinikPhelype Oleinik
28.6k64894
answered May 24 at 0:18
Phelype OleinikPhelype Oleinik
28.6k64894
28.6k64894
Why__? These would need to be public
– Joseph Wright♦
May 24 at 6:06
1
I wouldn't usel_tmpa_box.
– egreg
May 24 at 6:24
@JosephWright Only theSetToSomething, no? Why does__bp_box_set_to:NNnneed to be public?
– Phelype Oleinik
May 24 at 9:00
@PhelypeOleinik Because of the document/code level split: all document commands should be defined in terms of documented code-level ones.
– Joseph Wright♦
May 24 at 9:13
1
@PhelypeOleinik Model is: document command defines user interface, this is implemented by code-level commands which startmodule_...(so should be documented), and then they can use__module...commands which are internal and thus 'no use'.
– Joseph Wright♦
May 24 at 9:20
|
show 1 more comment
Why__? These would need to be public
– Joseph Wright♦
May 24 at 6:06
1
I wouldn't usel_tmpa_box.
– egreg
May 24 at 6:24
@JosephWright Only theSetToSomething, no? Why does__bp_box_set_to:NNnneed to be public?
– Phelype Oleinik
May 24 at 9:00
@PhelypeOleinik Because of the document/code level split: all document commands should be defined in terms of documented code-level ones.
– Joseph Wright♦
May 24 at 9:13
1
@PhelypeOleinik Model is: document command defines user interface, this is implemented by code-level commands which startmodule_...(so should be documented), and then they can use__module...commands which are internal and thus 'no use'.
– Joseph Wright♦
May 24 at 9:20
Why
__? These would need to be public– Joseph Wright♦
May 24 at 6:06
Why
__? These would need to be public– Joseph Wright♦
May 24 at 6:06
1
1
I wouldn't use
l_tmpa_box.– egreg
May 24 at 6:24
I wouldn't use
l_tmpa_box.– egreg
May 24 at 6:24
@JosephWright Only the
SetToSomething, no? Why does __bp_box_set_to:NNn need to be public?– Phelype Oleinik
May 24 at 9:00
@JosephWright Only the
SetToSomething, no? Why does __bp_box_set_to:NNn need to be public?– Phelype Oleinik
May 24 at 9:00
@PhelypeOleinik Because of the document/code level split: all document commands should be defined in terms of documented code-level ones.
– Joseph Wright♦
May 24 at 9:13
@PhelypeOleinik Because of the document/code level split: all document commands should be defined in terms of documented code-level ones.
– Joseph Wright♦
May 24 at 9:13
1
1
@PhelypeOleinik Model is: document command defines user interface, this is implemented by code-level commands which start
module_... (so should be documented), and then they can use __module... commands which are internal and thus 'no use'.– Joseph Wright♦
May 24 at 9:20
@PhelypeOleinik Model is: document command defines user interface, this is implemented by code-level commands which start
module_... (so should be documented), and then they can use __module... commands which are internal and thus 'no use'.– Joseph Wright♦
May 24 at 9:20
|
show 1 more comment
coffin_new:NspaceCoffin
hcoffin_set:NnspaceCoffin
% space width
dim_eval:ncoffin_wd:NspaceCoffin
box_new:NspaceBox
hbox_set:NnspaceBox
% space width
dim_eval:nbox_wd:NspaceBox
answered May 24 at 0:13
bp2017bp2017
1,234316
2
You can, sure, use a coffin, however the computational overhead is much larger than for a simple box (as you edited in just now :-)
– Phelype Oleinik
May 24 at 0:23
add a comment |
coffin_new:NspaceCoffin
hcoffin_set:NnspaceCoffin
% space width
dim_eval:ncoffin_wd:NspaceCoffin
box_new:NspaceBox
hbox_set:NnspaceBox
% space width
dim_eval:nbox_wd:NspaceBox
answered May 24 at 0:13
bp2017bp2017
1,234316
2
You can, sure, use a coffin, however the computational overhead is much larger than for a simple box (as you edited in just now :-)
– Phelype Oleinik
May 24 at 0:23
add a comment |
coffin_new:NspaceCoffin
hcoffin_set:NnspaceCoffin
% space width
dim_eval:ncoffin_wd:NspaceCoffin
box_new:NspaceBox
hbox_set:NnspaceBox
% space width
dim_eval:nbox_wd:NspaceBox
answered May 24 at 0:13
bp2017bp2017
1,234316
coffin_new:NspaceCoffin
hcoffin_set:NnspaceCoffin
% space width
dim_eval:ncoffin_wd:NspaceCoffin
box_new:NspaceBox
hbox_set:NnspaceBox
% space width
dim_eval:nbox_wd:NspaceBox
answered May 24 at 0:13
bp2017bp2017
1,234316
edited May 24 at 0:22
answered May 24 at 0:13
bp2017bp2017
1,234316
answered May 24 at 0:13
bp2017bp2017
1,234316
answered May 24 at 0:13
bp2017bp2017
1,234316
1,234316
2
You can, sure, use a coffin, however the computational overhead is much larger than for a simple box (as you edited in just now :-)
– Phelype Oleinik
May 24 at 0:23
add a comment |
2
You can, sure, use a coffin, however the computational overhead is much larger than for a simple box (as you edited in just now :-)
– Phelype Oleinik
May 24 at 0:23
2
2
You can, sure, use a coffin, however the computational overhead is much larger than for a simple box (as you edited in just now :-)
– Phelype Oleinik
May 24 at 0:23
You can, sure, use a coffin, however the computational overhead is much larger than for a simple box (as you edited in just now :-)
– Phelype Oleinik
May 24 at 0:23
add a comment |
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1
your question title is about measuring boxes but if your actual goal is the example in the code then this is a very inefficient way to find the width of a space, that width is already available as a tex length it is fontdimen 2 of the current font.
– David Carlisle
May 24 at 6:45