114 lines
2.9 KiB
Smalltalk
114 lines
2.9 KiB
Smalltalk
"
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I model a Markdown document.
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At some point the idea is to have a full native parser implemented to deal
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with my syntax, but meanwhile I will be collaborating with external parsers,
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particularly the ones provided by Pandoc and/or Lunamark.
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"
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Class {
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#name : #Markdown,
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#superclass : #Object,
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#instVars : [
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'contents'
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],
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#category : #'Grafoscopio-Utils'
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}
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{ #category : #'instance creation' }
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Markdown class >> fromFile: aFileReference [
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^ self new fromFile: aFileReference
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]
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{ #category : #utilities }
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Markdown class >> yamlMetadataDelimiter [
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^ '---'
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]
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{ #category : #operation }
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Markdown >> commentYAMLMetadata [
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| newContents |
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self detectYAMLMetadata ifFalse: [ ^ self ].
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newContents := '' writeStream.
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newContents nextPutAll: '<!--@yaml:'; crlf.
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self extractYAMLMetadata do: [ :line |
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newContents nextPutAll: line ].
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newContents nextPutAll: String cr.
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newContents nextPutAll: '-->'; crlf.
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(self lines copyFrom: self locateYAMLMetadataClosing + 2 to: self lines size) do: [ :line |
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newContents nextPutAll: line; crlf ].
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self contents: newContents contents.
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^ self contents
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]
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{ #category : #utilities }
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Markdown >> containsYAMLMetadataClosing [
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^ self locateYAMLMetadataClosing > 0
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]
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{ #category : #accessing }
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Markdown >> contents [
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^ contents
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]
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{ #category : #accessing }
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Markdown >> contents: anObject [
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contents := anObject
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]
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{ #category : #utilities }
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Markdown >> detectYAMLMetadata [
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| lines |
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lines := self lines.
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^ self startsWithYAMLMetadataDelimiter
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and: [ lines allButFirst
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detect: [ :currentLine | currentLine beginsWith: self class yamlMetadataDelimiter ]
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ifFound: [ ^ true ] ifNone: [ ^ false ] ]
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]
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{ #category : #operation }
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Markdown >> extractYAMLMetadata [
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self detectYAMLMetadata ifFalse: [ ^ nil ].
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^ self lines copyFrom: 2 to: (self locateYAMLMetadataClosing)
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]
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{ #category : #'instance creation' }
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Markdown >> fromFile: aFileReference [
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self contents: aFileReference contents.
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]
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{ #category : #utilities }
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Markdown >> lines [
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^ self contents lines.
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]
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{ #category : #utilities }
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Markdown >> locateYAMLMetadataClosing [
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"I return the line where the closing of the YAML metadata occurs or 0 if no closing is found."
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| result |
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self startsWithYAMLMetadataDelimiter ifFalse: [ ^ self ].
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result := 0.
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self lines allButFirst doWithIndex: [ :currentLine :i |
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(currentLine beginsWith: self class yamlMetadataDelimiter) ifTrue: [ result := i ]].
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^ result
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]
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{ #category : #utilities }
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Markdown >> startsWithYAMLMetadataDelimiter [
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^ self lines first beginsWith: self class yamlMetadataDelimiter
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]
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{ #category : #utilities }
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Markdown >> yamlMetadataAsString [
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| output |
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self extractYAMLMetadata ifNil: [ ^ nil ].
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output := String new writeStream.
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output nextPutAll: self class yamlMetadataDelimiter; cr.
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self extractYAMLMetadata do: [ :line |
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output nextPutAll: line; cr.
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].
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output nextPutAll: self class yamlMetadataDelimiter; cr.
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^ output contents.
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]
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