Parse tag names as separate tokens
This commit is contained in:
Max Brunsfeld
parent
4d11a75675
commit
5f2a122de7
147
corpus/main.txt
147
corpus/main.txt
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@ -6,9 +6,9 @@ Tags
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(fragment
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(element
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(start_tag)
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(start_tag (tag_name))
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(text)
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(end_tag)))
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(end_tag (tag_name))))
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===================================
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Tags with attributes
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@ -19,6 +19,7 @@ Tags with attributes
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(fragment
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(element
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(start_tag
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(tag_name)
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(attribute
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(attribute_name)
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(attribute_value))
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@ -27,7 +28,7 @@ Tags with attributes
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(quoted_attribute_value (attribute_value)))
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(attribute
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(attribute_name)))
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(end_tag)))
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(end_tag (tag_name))))
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===================================
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Nested tags
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@ -41,17 +42,19 @@ Nested tags
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(fragment
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(element
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(start_tag)
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(element
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(start_tag)
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(text)
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(end_tag))
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(start_tag (tag_name))
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(text)
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(element
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(start_tag)
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(start_tag (tag_name))
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(text)
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(end_tag))
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(end_tag)))
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(end_tag (tag_name)))
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(text)
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(element
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(start_tag (tag_name))
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(text)
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(end_tag (tag_name)))
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(text)
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(end_tag (tag_name))))
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==================================
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Void tags
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@ -61,16 +64,18 @@ Void tags
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(fragment
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(element
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(start_tag)
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(start_tag (tag_name))
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(element
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(start_tag
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(tag_name)
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(attribute (attribute_name) (quoted_attribute_value (attribute_value)))))
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(element (start_tag))
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(element (start_tag (tag_name)))
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(element
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(self_closing_tag
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(tag_name)
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(attribute (attribute_name) (attribute_value))
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(attribute (attribute_name) (attribute_value))))
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(end_tag)))
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(end_tag (tag_name))))
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==================================
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Comments
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@ -83,15 +88,16 @@ Comments
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(fragment
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(comment)
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(text)
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(element
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(start_tag)
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(start_tag (tag_name))
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(comment)
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(end_tag)))
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(text)
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(end_tag (tag_name))))
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==================================
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Raw text elements
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==================================
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<script>
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</s
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</sc
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@ -108,11 +114,14 @@ Raw text elements
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(fragment
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(raw_element
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(start_tag)
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(end_tag))
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(start_tag (tag_name))
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(raw_text)
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(end_tag (tag_name)))
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(text)
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(raw_element
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(start_tag)
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(end_tag))
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(start_tag (tag_name))
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(raw_text)
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(end_tag (tag_name)))
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(text))
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==================================
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@ -146,10 +155,11 @@ LI elements without close tags
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(fragment
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(element
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(start_tag)
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(element (start_tag) (text))
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(element (start_tag) (text))
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(end_tag)))
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(start_tag (tag_name))
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(text)
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(element (start_tag (tag_name)) (text))
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(element (start_tag (tag_name)) (text))
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(end_tag (tag_name))))
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======================================
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DT and DL elements without close tags
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@ -165,13 +175,14 @@ DT and DL elements without close tags
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(fragment
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(element
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(start_tag)
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(element (start_tag) (text))
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(element (start_tag) (text))
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(element (start_tag) (text))
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(element (start_tag) (text))
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(element (start_tag) (text))
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(end_tag)))
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(start_tag (tag_name))
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(text)
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(element (start_tag (tag_name)) (text))
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(element (start_tag (tag_name)) (text))
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(element (start_tag (tag_name)) (text))
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(element (start_tag (tag_name)) (text))
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(element (start_tag (tag_name)) (text))
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(end_tag (tag_name))))
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======================================
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P elements without close tags
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@ -184,11 +195,12 @@ P elements without close tags
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---
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(fragment
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(element (start_tag) (text))
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(element (start_tag) (text) (end_tag))
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(element (start_tag) (text))
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(element (start_tag) (text))
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(element (start_tag) (text) (end_tag)))
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(element (start_tag (tag_name)) (text))
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(element (start_tag (tag_name)) (text) (end_tag (tag_name)))
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(text)
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(element (start_tag (tag_name)) (text))
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(element (start_tag (tag_name)) (text))
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(element (start_tag (tag_name)) (text) (end_tag (tag_name))))
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======================================
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Ruby annotation elements without close tags
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@ -198,17 +210,16 @@ Ruby annotation elements without close tags
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(fragment
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(element
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(start_tag)
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(start_tag (tag_name))
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(text)
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(element (start_tag) (text))
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(element (start_tag) (text))
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(element (start_tag) (text))
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(end_tag)))
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(element (start_tag (tag_name)) (text))
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(element (start_tag (tag_name)) (text))
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(element (start_tag (tag_name)) (text))
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(end_tag (tag_name))))
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=======================================
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COLGROUP elements without end tags
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=======================================
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<table>
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<colgroup>
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<col style="background-color: #0f0">
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@ -223,18 +234,29 @@ COLGROUP elements without end tags
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(fragment
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(element
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(start_tag)
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(start_tag (tag_name))
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(text)
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(element
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(start_tag)
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(element (start_tag (attribute (attribute_name) (quoted_attribute_value (attribute_value)))))
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(element (start_tag (attribute (attribute_name) (quoted_attribute_value (attribute_value))))))
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(start_tag (tag_name))
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(text)
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(element (start_tag
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(tag_name)
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(attribute (attribute_name) (quoted_attribute_value (attribute_value)))))
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(element (start_tag
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(tag_name)
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(attribute (attribute_name) (quoted_attribute_value (attribute_value))))))
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(element
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(start_tag)
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(element (start_tag) (text) (end_tag))
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(element (start_tag) (text) (end_tag))
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(element (start_tag) (text) (end_tag))
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(end_tag))
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(end_tag)))
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(start_tag (tag_name))
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(text)
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(element (start_tag (tag_name)) (text) (end_tag (tag_name)))
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(text)
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(element (start_tag (tag_name)) (text) (end_tag (tag_name)))
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(text)
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(element (start_tag (tag_name)) (text) (end_tag (tag_name)))
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(text)
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(end_tag (tag_name)))
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(text)
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(end_tag (tag_name))))
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=========================================
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TR, TD, and TH elements without end tags
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@ -251,13 +273,16 @@ TR, TD, and TH elements without end tags
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(fragment
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(element
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(start_tag)
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(start_tag (tag_name))
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(text)
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(element
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(start_tag)
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(element (start_tag) (text))
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(element (start_tag) (text)))
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(start_tag (tag_name))
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(text)
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(element (start_tag (tag_name)) (text))
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(element (start_tag (tag_name)) (text)))
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(element
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(start_tag)
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(element (start_tag) (text))
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(element (start_tag) (text)))
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(end_tag)))
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(start_tag (tag_name))
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(text)
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(element (start_tag (tag_name)) (text))
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(element (start_tag (tag_name)) (text)))
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(end_tag (tag_name))))
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44
grammar.js
44
grammar.js
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@ -7,14 +7,13 @@ module.exports = grammar({
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],
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externals: $ => [
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$._open_start_tag,
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$._open_raw_start_tag,
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$._close_start_tag,
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$._self_close_start_tag,
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$.end_tag,
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$._start_tag_name,
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$._start_raw_tag_name,
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$._end_tag_name,
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$.erroneous_end_tag_name,
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'/>',
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$._implicit_end_tag,
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$._erroneous_end_tag,
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$._raw_text,
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$.raw_text,
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$.comment,
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],
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@ -31,8 +30,8 @@ module.exports = grammar({
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_node: $ => choice(
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$.doctype,
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$.text,
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$._erroneous_end_tag,
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$.element,
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$.erroneous_end_tag,
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$.raw_element
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),
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@ -47,26 +46,41 @@ module.exports = grammar({
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raw_element: $ => seq(
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alias($._raw_start_tag, $.start_tag),
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optional($._raw_text),
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optional($.raw_text),
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$.end_tag
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),
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start_tag: $ => seq(
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$._open_start_tag,
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'<',
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alias($._start_tag_name, $.tag_name),
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repeat($.attribute),
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$._close_start_tag
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'>'
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),
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_raw_start_tag: $ => seq(
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$._open_raw_start_tag,
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'<',
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alias($._start_raw_tag_name, $.tag_name),
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repeat($.attribute),
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$._close_start_tag
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'>'
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),
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self_closing_tag: $ => seq(
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$._open_start_tag,
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'<',
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alias($._start_tag_name, $.tag_name),
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repeat($.attribute),
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$._self_close_start_tag
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'/>'
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),
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end_tag: $ => seq(
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'</',
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alias($._end_tag_name, $.tag_name),
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'>'
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),
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erroneous_end_tag: $ => seq(
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'</',
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$.erroneous_end_tag_name,
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'>'
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),
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attribute: $ => seq(
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@ -42,11 +42,11 @@
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},
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{
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"type": "SYMBOL",
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"name": "_erroneous_end_tag"
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"name": "element"
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},
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{
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"type": "SYMBOL",
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"name": "element"
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"name": "erroneous_end_tag"
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},
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{
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"type": "SYMBOL",
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@ -109,7 +109,7 @@
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"members": [
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{
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"type": "SYMBOL",
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"name": "_raw_text"
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"name": "raw_text"
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},
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{
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"type": "BLANK"
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@ -126,8 +126,17 @@
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"type": "SEQ",
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"members": [
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{
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"type": "STRING",
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"value": "<"
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},
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{
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"type": "ALIAS",
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"content": {
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"type": "SYMBOL",
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"name": "_open_start_tag"
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"name": "_start_tag_name"
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},
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"named": true,
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"value": "tag_name"
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},
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{
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"type": "REPEAT",
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@ -137,8 +146,8 @@
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}
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},
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{
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"type": "SYMBOL",
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"name": "_close_start_tag"
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"type": "STRING",
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"value": ">"
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}
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]
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},
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@ -146,8 +155,17 @@
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"type": "SEQ",
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"members": [
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{
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"type": "STRING",
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"value": "<"
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},
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{
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"type": "ALIAS",
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"content": {
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"type": "SYMBOL",
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"name": "_open_raw_start_tag"
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"name": "_start_raw_tag_name"
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},
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"named": true,
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"value": "tag_name"
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},
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{
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"type": "REPEAT",
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@ -157,8 +175,8 @@
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}
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},
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{
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"type": "SYMBOL",
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"name": "_close_start_tag"
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"type": "STRING",
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"value": ">"
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}
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]
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},
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@ -166,8 +184,17 @@
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"type": "SEQ",
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"members": [
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{
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"type": "STRING",
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"value": "<"
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},
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{
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"type": "ALIAS",
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"content": {
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"type": "SYMBOL",
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"name": "_open_start_tag"
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"name": "_start_tag_name"
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},
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"named": true,
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"value": "tag_name"
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},
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{
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"type": "REPEAT",
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@ -177,8 +204,47 @@
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}
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},
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{
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"type": "STRING",
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"value": "/>"
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}
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]
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},
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"end_tag": {
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"type": "SEQ",
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"members": [
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{
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"type": "STRING",
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"value": "</"
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},
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{
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"type": "ALIAS",
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"content": {
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"type": "SYMBOL",
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"name": "_self_close_start_tag"
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"name": "_end_tag_name"
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},
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"named": true,
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"value": "tag_name"
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},
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{
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"type": "STRING",
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"value": ">"
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}
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]
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},
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"erroneous_end_tag": {
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"type": "SEQ",
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"members": [
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{
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"type": "STRING",
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"value": "</"
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},
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{
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"type": "SYMBOL",
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"name": "erroneous_end_tag_name"
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},
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{
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"type": "STRING",
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"value": ">"
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}
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]
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},
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@ -313,23 +379,23 @@
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"externals": [
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{
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"type": "SYMBOL",
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"name": "_open_start_tag"
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"name": "_start_tag_name"
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},
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{
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"type": "SYMBOL",
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"name": "_open_raw_start_tag"
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"name": "_start_raw_tag_name"
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},
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{
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"type": "SYMBOL",
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"name": "_close_start_tag"
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"name": "_end_tag_name"
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},
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{
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"type": "SYMBOL",
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"name": "_self_close_start_tag"
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"name": "erroneous_end_tag_name"
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},
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{
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"type": "SYMBOL",
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"name": "end_tag"
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"type": "STRING",
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"value": "/>"
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},
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{
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"type": "SYMBOL",
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@ -337,11 +403,7 @@
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},
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{
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"type": "SYMBOL",
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"name": "_erroneous_end_tag"
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},
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{
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"type": "SYMBOL",
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"name": "_raw_text"
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"name": "raw_text"
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},
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{
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"type": "SYMBOL",
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@ -11,13 +11,12 @@ using std::vector;
|
|||
using std::string;
|
||||
|
||||
enum TokenType {
|
||||
OPEN_START_TAG,
|
||||
OPEN_RAW_START_TAG,
|
||||
CLOSE_START_TAG,
|
||||
SELF_CLOSE_START_TAG,
|
||||
END_TAG,
|
||||
START_TAG_NAME,
|
||||
START_RAW_TAG_NAME,
|
||||
END_TAG_NAME,
|
||||
ERRONEOUS_END_TAG_NAME,
|
||||
SELF_CLOSING_TAG_DELIMITER,
|
||||
IMPLICIT_END_TAG,
|
||||
ERRONEOUS_END_TAG,
|
||||
RAW_TEXT,
|
||||
COMMENT
|
||||
};
|
||||
|
|
@ -68,7 +67,7 @@ struct Scanner {
|
|||
return tag_name;
|
||||
}
|
||||
|
||||
bool comment(TSLexer *lexer) {
|
||||
bool scan_comment(TSLexer *lexer) {
|
||||
if (lexer->lookahead != '-') return false;
|
||||
lexer->advance(lexer, false);
|
||||
if (lexer->lookahead != '-') return false;
|
||||
|
|
@ -98,7 +97,7 @@ struct Scanner {
|
|||
return false;
|
||||
}
|
||||
|
||||
bool raw_text(TSLexer *lexer) {
|
||||
bool scan_raw_text(TSLexer *lexer) {
|
||||
if (!tags.size()) return false;
|
||||
|
||||
lexer->mark_end(lexer);
|
||||
|
|
@ -123,69 +122,90 @@ struct Scanner {
|
|||
return true;
|
||||
}
|
||||
|
||||
bool start_tag(TSLexer *lexer) {
|
||||
bool scan_implicit_end_tag(TSLexer *lexer) {
|
||||
Tag *parent = tags.empty() ? nullptr : &tags.back();
|
||||
|
||||
bool is_closing_tag = false;
|
||||
if (lexer->lookahead == '/') {
|
||||
is_closing_tag = true;
|
||||
lexer->advance(lexer, false);
|
||||
} else {
|
||||
if (parent && parent->is_void()) {
|
||||
tags.pop_back();
|
||||
lexer->result_symbol = IMPLICIT_END_TAG;
|
||||
return true;
|
||||
}
|
||||
}
|
||||
|
||||
auto tag_name = scan_tag_name(lexer);
|
||||
if (tag_name.empty()) return false;
|
||||
|
||||
Tag next_tag = Tag::for_name(tag_name);
|
||||
|
||||
if (parent && !parent->can_contain(next_tag)) {
|
||||
tags.pop_back();
|
||||
lexer->result_symbol = IMPLICIT_END_TAG;
|
||||
return true;
|
||||
}
|
||||
|
||||
tags.push_back(next_tag);
|
||||
lexer->mark_end(lexer);
|
||||
lexer->result_symbol = next_tag.is_raw() ? OPEN_RAW_START_TAG : OPEN_START_TAG;
|
||||
return true;
|
||||
}
|
||||
|
||||
bool end_tag(TSLexer *lexer) {
|
||||
auto tag_name = scan_tag_name(lexer);
|
||||
if (tag_name.empty()) return false;
|
||||
|
||||
lexer->advance(lexer, false);
|
||||
|
||||
Tag tag = Tag::for_name(tag_name);
|
||||
|
||||
if (is_closing_tag) {
|
||||
// The tag correctly closes the topmost element on the stack
|
||||
if (tag == tags.back()) {
|
||||
tags.pop_back();
|
||||
lexer->mark_end(lexer);
|
||||
lexer->result_symbol = END_TAG;
|
||||
return true;
|
||||
}
|
||||
if (next_tag == tags.back()) return false;
|
||||
|
||||
// Otherwise, dig deeper and queue implicit end tags (to be nice in
|
||||
// the case of malformed HTML)
|
||||
if (std::find(tags.begin(), tags.end(), tag) != tags.end()) {
|
||||
if (std::find(tags.begin(), tags.end(), next_tag) != tags.end()) {
|
||||
tags.pop_back();
|
||||
lexer->result_symbol = IMPLICIT_END_TAG;
|
||||
return true;
|
||||
}
|
||||
} else if (parent && !parent->can_contain(next_tag)) {
|
||||
tags.pop_back();
|
||||
lexer->result_symbol = IMPLICIT_END_TAG;
|
||||
return true;
|
||||
}
|
||||
|
||||
// You closed a tag you never opened 😭
|
||||
lexer->mark_end(lexer);
|
||||
lexer->result_symbol = ERRONEOUS_END_TAG;
|
||||
return false;
|
||||
}
|
||||
|
||||
bool scan_start_tag_name(TSLexer *lexer) {
|
||||
auto tag_name = scan_tag_name(lexer);
|
||||
if (tag_name.empty()) return false;
|
||||
Tag tag = Tag::for_name(tag_name);
|
||||
tags.push_back(tag);
|
||||
if (tag.is_raw()) {
|
||||
lexer->result_symbol = START_RAW_TAG_NAME;
|
||||
} else {
|
||||
lexer->result_symbol = START_TAG_NAME;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
bool scan_end_tag_name(TSLexer *lexer) {
|
||||
auto tag_name = scan_tag_name(lexer);
|
||||
if (tag_name.empty()) return false;
|
||||
Tag tag = Tag::for_name(tag_name);
|
||||
if (!tags.empty() && tags.back() == tag) {
|
||||
tags.pop_back();
|
||||
lexer->result_symbol = END_TAG_NAME;
|
||||
} else {
|
||||
lexer->result_symbol = ERRONEOUS_END_TAG_NAME;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
bool scan_self_closing_tag_delimiter(TSLexer *lexer) {
|
||||
lexer->advance(lexer, false);
|
||||
if (lexer->lookahead == '>') {
|
||||
lexer->advance(lexer, false);
|
||||
tags.pop_back();
|
||||
lexer->result_symbol = SELF_CLOSING_TAG_DELIMITER;
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
bool scan(TSLexer *lexer, const bool *valid_symbols) {
|
||||
while (iswspace(lexer->lookahead)) {
|
||||
lexer->advance(lexer, true);
|
||||
}
|
||||
|
||||
if (valid_symbols[RAW_TEXT] && !valid_symbols[OPEN_START_TAG] && !valid_symbols[CLOSE_START_TAG]) {
|
||||
return raw_text(lexer);
|
||||
if (valid_symbols[RAW_TEXT] && !valid_symbols[START_TAG_NAME] && !valid_symbols[END_TAG_NAME]) {
|
||||
return scan_raw_text(lexer);
|
||||
}
|
||||
|
||||
switch (lexer->lookahead) {
|
||||
|
|
@ -195,38 +215,26 @@ struct Scanner {
|
|||
|
||||
if (lexer->lookahead == '!') {
|
||||
lexer->advance(lexer, false);
|
||||
return comment(lexer);
|
||||
return scan_comment(lexer);
|
||||
}
|
||||
|
||||
if (valid_symbols[OPEN_START_TAG] || valid_symbols[END_TAG]) {
|
||||
if (lexer->lookahead == '/') {
|
||||
lexer->advance(lexer, false);
|
||||
return end_tag(lexer);
|
||||
}
|
||||
return start_tag(lexer);
|
||||
}
|
||||
|
||||
break;
|
||||
|
||||
case '>':
|
||||
if (valid_symbols[CLOSE_START_TAG]) {
|
||||
lexer->advance(lexer, false);
|
||||
lexer->result_symbol = CLOSE_START_TAG;
|
||||
return true;
|
||||
if (valid_symbols[IMPLICIT_END_TAG]) {
|
||||
return scan_implicit_end_tag(lexer);
|
||||
}
|
||||
break;
|
||||
|
||||
case '/':
|
||||
if (valid_symbols[SELF_CLOSE_START_TAG]) {
|
||||
lexer->advance(lexer, false);
|
||||
if (lexer->lookahead == '>') {
|
||||
lexer->advance(lexer, false);
|
||||
tags.pop_back();
|
||||
lexer->result_symbol = SELF_CLOSE_START_TAG;
|
||||
return true;
|
||||
}
|
||||
if (valid_symbols[SELF_CLOSING_TAG_DELIMITER]) {
|
||||
return scan_self_closing_tag_delimiter(lexer);
|
||||
}
|
||||
break;
|
||||
|
||||
default:
|
||||
if (valid_symbols[START_TAG_NAME] || valid_symbols[END_TAG_NAME]) {
|
||||
return valid_symbols[START_TAG_NAME]
|
||||
? scan_start_tag_name(lexer)
|
||||
: scan_end_tag_name(lexer);
|
||||
}
|
||||
}
|
||||
|
||||
return false;
|
||||
|
|
|
|||
Loading…
Reference in New Issue