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add overarrow and underarrow #11

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add overarrow and underarrow #11

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ec0cf17
add overarrow and underarrow
anko9801 Oct 10, 2022
538bd01
fix last position of rightarrowhead
anko9801 Oct 10, 2022
e63ffac
fix commands.md
anko9801 Oct 10, 2022
34a3720
referctoring
anko9801 Oct 10, 2022
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5 changes: 5 additions & 0 deletions commands.md
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Original file line number Diff line number Diff line change
Expand Up @@ -57,6 +57,11 @@
* `\widehat`
* `\overline`
* `\overrightarrow`
* `\overleftarrow`
* `\overleftrightarrow`
* `\underrightarrow`
* `\underleftarrow`
* `\underleftrightarrow`

## Matrices

Expand Down
126 changes: 116 additions & 10 deletions src/accent.satyh
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Expand Up @@ -23,6 +23,11 @@ module AZMathAccent : sig
direct \widehat : [float?; math;] math-cmd
direct \overline: [math;] math-cmd
direct \overrightarrow: [math;] math-cmd
direct \overleftarrow: [math;] math-cmd
direct \overleftrightarrow: [math;] math-cmd
direct \underrightarrow: [math;] math-cmd
direct \underleftarrow: [math;] math-cmd
direct \underleftrightarrow: [math;] math-cmd

end = struct

Expand Down Expand Up @@ -122,8 +127,39 @@ end = struct
in
text-in-math MathOrd embedf

let path-arrowline x-start x-end = Gr.line (x-start, 0pt) (x-end, 0pt)
let path-leftarrowhead x-start wid-arrowhead =
start-path (x-start +' 2.5pt, wid-arrowhead)
|> bezier-to (x-start +' 2.0pt, wid-arrowhead *' 0.5) (x-start +' 1.5pt, wid-arrowhead *' 0.167) (x-start, 0pt)
|> bezier-to (x-start +' 1.5pt, 0pt -' wid-arrowhead *' 0.167) (x-start +' 2.0pt, 0pt -' wid-arrowhead *' 0.5) (x-start +' 2.5pt, 0pt -' wid-arrowhead)
|> terminate-path
let path-rightarrowhead x-end wid-arrowhead =
start-path (x-end -' 2.5pt, wid-arrowhead)
|> bezier-to (x-end -' 2.0pt, wid-arrowhead *' 0.5) (x-end -' 1.5pt, wid-arrowhead *' 0.167) (x-end, 0pt)
|> bezier-to (x-end -' 1.5pt, 0pt -' wid-arrowhead *' 0.167) (x-end -' 2.0pt, 0pt -' wid-arrowhead *' 0.5) (x-end -' 2.5pt, 0pt -' wid-arrowhead)
|> terminate-path

let-math \overrightarrow m =
let embedf ctx =
let fsize = get-font-size ctx in
let margin = fsize *' 0.25 in
let wid-arrowhead = 3pt in

let deco (x, y) wid ht dp =
let text-color = get-text-color ctx in
let ht-base = y +' ht -' wid-arrowhead in
let x-start = 0pt in
let x-end = wid in
[
stroke 0.5pt text-color (path-arrowline x-start x-end |> shift-path (x, ht-base));
stroke 0.5pt text-color (path-rightarrowhead x-end wid-arrowhead |> shift-path (x, ht-base));
]
in
inline-frame-outer (0pt, 0pt, margin +' wid-arrowhead, 0pt) deco (embed-math ctx m)
in
text-in-math MathOrd embedf

let-math \overleftarrow m =
let embedf ctx =
let fsize = get-font-size ctx in
let margin = fsize *' 0.25 in
Expand All @@ -132,26 +168,96 @@ end = struct
let deco (x, y) wid ht dp =
let text-color = get-text-color ctx in
let ht-base = y +' ht -' wid-arrowhead in
let x-start = 0pt in
let x-end = wid in
[
stroke 0.5pt text-color (path-arrowline x-start x-end |> shift-path (x, ht-base));
stroke 0.5pt text-color (path-leftarrowhead x-start wid-arrowhead |> shift-path (x, ht-base));
]
in
inline-frame-outer (0pt, 0pt, margin +' wid-arrowhead, 0pt) deco (embed-math ctx m)
in
text-in-math MathOrd embedf

let-math \overleftrightarrow m =
let embedf ctx =
let fsize = get-font-size ctx in
let margin = fsize *' 0.25 in
let wid-arrowhead = 3pt in

let deco (x, y) wid ht dp =
let text-color = get-text-color ctx in
let ht-base = y +' ht -' wid-arrowhead in
let x-start = 0pt in
let x-end = wid -' 1pt in
let x-end = wid in
[
stroke 0.5pt text-color (path-arrowline x-start x-end |> shift-path (x, ht-base));
stroke 0.5pt text-color (path-leftarrowhead x-start wid-arrowhead |> shift-path (x, ht-base));
stroke 0.5pt text-color (path-rightarrowhead x-end wid-arrowhead |> shift-path (x, ht-base));
]
in
inline-frame-outer (0pt, 0pt, margin +' wid-arrowhead, 0pt) deco (embed-math ctx m)
in
text-in-math MathOrd embedf

let path-line = Gr.line (x-start, 0pt) (x-end, 0pt) in
let-math \underrightarrow m =
let embedf ctx =
let fsize = get-font-size ctx in
let margin = fsize *' 0.25 in
let wid-arrowhead = 3pt in

let path-arrowhead =
start-path (x-end -' 2.5pt, wid-arrowhead)
|> bezier-to (x-end -' 2.0pt, 1.5pt) (x-end -' 1.5pt, 0.5pt) (x-end, 0pt)
|> bezier-to (x-end -' 1.5pt, -0.5pt) (x-end -' 2.0pt, -1.5pt) (x-end -' 2.5pt, (0pt -' wid-arrowhead))
|> terminate-path
in
let deco (x, y) wid ht dp =
let text-color = get-text-color ctx in
let ht-base = y -' wid-arrowhead in
let x-start = 0pt in
let x-end = wid in
[
stroke 0.5pt text-color (path-arrowline x-start x-end |> shift-path (x, ht-base));
stroke 0.5pt text-color (path-rightarrowhead x-end wid-arrowhead |> shift-path (x, ht-base));
]
in
inline-frame-outer (0pt, 0pt, margin +' wid-arrowhead, 0pt) deco (embed-math ctx m)
in
text-in-math MathOrd embedf

let-math \underleftarrow m =
let embedf ctx =
let fsize = get-font-size ctx in
let margin = fsize *' 0.25 in
let wid-arrowhead = 3pt in

let deco (x, y) wid ht dp =
let text-color = get-text-color ctx in
let ht-base = y -' wid-arrowhead in
let x-start = 0pt in
let x-end = wid in
[
stroke 0.5pt text-color (path-line |> shift-path (x, ht-base));
stroke 0.5pt text-color (path-arrowhead |> shift-path (x, ht-base));
stroke 0.5pt text-color (path-arrowline x-start x-end |> shift-path (x, ht-base));
stroke 0.5pt text-color (path-leftarrowhead x-start wid-arrowhead |> shift-path (x, ht-base));
]
in
inline-frame-outer (0pt, 0pt, margin +' wid-arrowhead, 0pt) deco (embed-math ctx m)
in
text-in-math MathOrd embedf

let-math \underleftrightarrow m =
let embedf ctx =
let fsize = get-font-size ctx in
let margin = fsize *' 0.25 in
let wid-arrowhead = 3pt in

let deco (x, y) wid ht dp =
let text-color = get-text-color ctx in
let ht-base = y -' wid-arrowhead in
let x-start = 0pt in
let x-end = wid in
[
stroke 0.5pt text-color (path-arrowline x-start x-end |> shift-path (x, ht-base));
stroke 0.5pt text-color (path-leftarrowhead x-start wid-arrowhead |> shift-path (x, ht-base));
stroke 0.5pt text-color (path-rightarrowhead x-end wid-arrowhead |> shift-path (x, ht-base));
]
in
inline-frame-outer (0pt, 0pt, margin +' wid-arrowhead, 0pt) deco (embed-math ctx m)
in
text-in-math MathOrd embedf
end