Rework JS exception system

Now we use Result for passing exceptions to JS. As a result, we can
finally get rid of the .jserr pragma.

1 files changed, 96 insertions, 0 deletions

diff --git a/src/js/exception.nim b/src/js/exception.nim
new file mode 100644
index 00000000..1550d431
--- /dev/null
+++ b/src/js/exception.nim
@@ -0,0 +1,96 @@
+import tables
+
+import bindings/quickjs
+import js/javascript
+
+const NamesTable = {
+  "IndexSizeError": 1u16,
+  "HierarchyRequestError": 3u16,
+  "WrongDocumentError": 4u16,
+  "InvalidCharacterError": 5u16,
+  "NoModificationAllowedError": 7u16,
+  "NotFoundError": 8u16,
+  "NotSupportedError": 9u16,
+  "InUseAttributeError": 10u16,
+  "InvalidStateError": 11u16,
+  "SyntaxError": 12u16,
+  "InvalidModificationError": 13u16,
+  "NamespaceError": 14u16,
+  "InvalidAccessError": 15u16,
+  "TypeMismatchError": 17u16,
+  "SecurityError": 18u16,
+  "NetworkError": 19u16,
+  "AbortError": 20u16,
+  "URLMismatchError": 21u16,
+  "QuotaExceededError": 22u16,
+  "TimeoutError": 23u16,
+  "InvalidNodeTypeError": 24u16,
+  "DataCloneError": 25u16
+}.toTable()
+
+type DOMException* = ref object of JSError
+  name* {.jsget.}: string
+
+proc newDOMException*(message = "", name = "Error"): DOMException {.jsctor.} =
+  return DOMException(
+    e: JS_DOM_EXCEPTION,
+    name: name,
+    message: message
+  )
+
+func message0(this: DOMException): string {.jsfget: "message".} =
+  return this.message
+
+func code(this: DOMException): uint16 {.jsfget.} =
+  return NamesTable.getOrDefault(this.name, 0u16)
+
+proc newEvalError*(message: string): JSError =
+  return JSError(
+    e: JS_EVAL_ERROR0,
+    message: message
+  )
+
+proc newRangeError*(message: string): JSError =
+  return JSError(
+    e: JS_RANGE_ERROR0,
+    message: message
+  )
+
+proc newReferenceError*(message: string): JSError =
+  return JSError(
+    e: JS_REFERENCE_ERROR0,
+    message: message
+  )
+
+proc newSyntaxError*(message: string): JSError =
+  return JSError(
+    e: JS_SYNTAX_ERROR0,
+    message: message
+  )
+
+proc newTypeError*(message: string): JSError =
+  return JSError(
+    e: JS_TYPE_ERROR0,
+    message: message
+  )
+
+proc newURIError*(message: string): JSError =
+  return JSError(
+    e: JS_URI_ERROR0,
+    message: message
+  )
+
+proc newInternalError*(message: string): JSError =
+  return JSError(
+    e: JS_INTERNAL_ERROR0,
+    message: message
+  )
+
+proc newAggregateError*(message: string): JSError =
+  return JSError(
+    e: JS_AGGREGATE_ERROR0,
+    message: message
+  )
+
+proc addDOMExceptionModule*(ctx: JSContext) =
+  ctx.registerType(DOMException, JS_CLASS_ERROR, errid = opt(JS_DOM_EXCEPTION))