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361 lines
11 KiB
Plaintext
361 lines
11 KiB
Plaintext
/**
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* Lib: JSON.ahk
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* JSON lib for AutoHotkey.
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* Version:
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* v2.1.0 [updated 01/28/2016 (MM/DD/YYYY)]
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* License:
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* WTFPL [http://wtfpl.net/]
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* Requirements:
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* Latest version of AutoHotkey (v1.1+ or v2.0-a+)
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* Installation:
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* Use #Include JSON.ahk or copy into a function library folder and then
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* use #Include <JSON>
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* Links:
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* GitHub: - https://github.com/cocobelgica/AutoHotkey-JSON
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* Forum Topic - http://goo.gl/r0zI8t
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* Email: - cocobelgica <at> gmail <dot> com
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*/
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/**
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* Class: JSON
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* The JSON object contains methods for parsing JSON and converting values
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* to JSON. Callable - NO; Instantiable - YES; Subclassable - YES;
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* Nestable(via #Include) - NO.
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* Methods:
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* Load() - see relevant documentation before method definition header
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* Dump() - see relevant documentation before method definition header
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*/
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class JSON
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{
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/**
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* Method: Load
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* Parses a JSON string into an AHK value
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* Syntax:
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* value := JSON.Load( text [, reviver ] )
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* Parameter(s):
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* value [retval] - parsed value
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* text [in, opt] - JSON formatted string
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* reviver [in, opt] - function object, similar to JavaScript's
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* JSON.parse() 'reviver' parameter
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*/
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class Load extends JSON.Functor
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{
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Call(self, text, reviver:="")
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{
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this.rev := IsObject(reviver) ? reviver : false
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this.keys := this.rev ? {} : false
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static q := Chr(34)
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, json_value := q . "{[01234567890-tfn"
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, json_value_or_array_closing := q . "{[]01234567890-tfn"
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, object_key_or_object_closing := q . "}"
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key := ""
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is_key := false
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root := {}
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stack := [root]
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next := json_value
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pos := 0
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while ((ch := SubStr(text, ++pos, 1)) != "") {
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if InStr(" `t`r`n", ch)
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continue
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if !InStr(next, ch, 1)
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this.ParseError(next, text, pos)
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holder := stack[1]
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is_array := holder.IsArray
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if InStr(",:", ch) {
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next := (is_key := !is_array && ch == ",") ? q : json_value
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} else if InStr("}]", ch) {
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ObjRemoveAt(stack, 1)
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next := stack[1]==root ? "" : stack[1].IsArray ? ",]" : ",}"
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} else {
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if InStr("{[", ch) {
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; Check if Array() is overridden and if its return value has
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; the 'IsArray' property. If so, Array() will be called normally,
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; otherwise, use a custom base object for arrays
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static json_array := Func("Array").IsBuiltIn || ![].IsArray ? {IsArray: true} : 0
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; sacrifice readability for minor(actually negligible) performance gain
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(ch == "{")
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? ( is_key := true
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, value := {}
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, next := object_key_or_object_closing )
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; ch == "["
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: ( value := json_array ? new json_array : []
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, next := json_value_or_array_closing )
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ObjInsertAt(stack, 1, value)
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if (this.keys)
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this.keys[value] := []
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} else {
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if (ch == q) {
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i := pos
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while (i := InStr(text, q,, i+1)) {
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value := StrReplace(SubStr(text, pos+1, i-pos-1), "\\", "\u005c")
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static ss_end := A_AhkVersion<"2" ? 0 : -1
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if (SubStr(value, ss_end) != "\")
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break
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}
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if (!i)
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this.ParseError("'", text, pos)
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value := StrReplace(value, "\/", "/")
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, value := StrReplace(value, "\" . q, q)
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, value := StrReplace(value, "\b", "`b")
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, value := StrReplace(value, "\f", "`f")
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, value := StrReplace(value, "\n", "`n")
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, value := StrReplace(value, "\r", "`r")
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, value := StrReplace(value, "\t", "`t")
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pos := i ; update pos
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i := 0
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while (i := InStr(value, "\",, i+1)) {
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if !(SubStr(value, i+1, 1) == "u")
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this.ParseError("\", text, pos - StrLen(SubStr(value, i+1)))
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uffff := Abs("0x" . SubStr(value, i+2, 4))
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if (A_IsUnicode || uffff < 0x100)
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value := SubStr(value, 1, i-1) . Chr(uffff) . SubStr(value, i+6)
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}
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if (is_key) {
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key := value, next := ":"
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continue
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}
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} else {
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value := SubStr(text, pos, i := RegExMatch(text, "[\]\},\s]|$",, pos)-pos)
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static number := "number"
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if value is %number%
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value += 0
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else if (value == "true" || value == "false")
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value := %value% + 0
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else if (value == "null")
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value := ""
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else
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; we can do more here to pinpoint the actual culprit
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; but that's just too much extra work.
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this.ParseError(next, text, pos, i)
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pos += i-1
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}
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next := holder==root ? "" : is_array ? ",]" : ",}"
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} ; If InStr("{[", ch) { ... } else
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is_array? key := ObjPush(holder, value) : holder[key] := value
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if (this.keys && this.keys.HasKey(holder))
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this.keys[holder].Push(key)
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}
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} ; while ( ... )
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return this.rev ? this.Walk(root, "") : root[""]
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}
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ParseError(expect, text, pos, len:=1)
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{
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static q := Chr(34)
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line := StrSplit(SubStr(text, 1, pos), "`n", "`r").Length()
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col := pos - InStr(text, "`n",, -(StrLen(text)-pos+1))
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msg := Format("{1}`n`nLine:`t{2}`nCol:`t{3}`nChar:`t{4}"
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, (expect == "") ? "Extra data"
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: (expect == "'") ? "Unterminated string starting at"
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: (expect == "\") ? "Invalid \escape"
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: (expect == ":") ? "Expecting ':' delimiter"
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: (expect == q) ? "Expecting object key enclosed in double quotes"
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: (expect == q . "}") ? "Expecting object key enclosed in double quotes or object closing '}'"
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: (expect == ",}") ? "Expecting ',' delimiter or object closing '}'"
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: (expect == ",]") ? "Expecting ',' delimiter or array closing ']'"
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: InStr(expect, "]") ? "Expecting JSON value or array closing ']'"
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: "Expecting JSON value(string, number, true, false, null, object or array)"
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, line, col, pos)
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static offset := A_AhkVersion<"2" ? -3 : -4
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throw Exception(msg, offset, SubStr(text, pos, len))
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}
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Walk(holder, key)
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{
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value := holder[key]
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if IsObject(value)
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for i, k in this.keys[value]
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value[k] := this.Walk.Call(this, value, k) ; bypass __Call
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return this.rev.Call(holder, key, value)
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}
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}
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/**
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* Method: Dump
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* Converts an AHK value into a JSON string
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* Syntax:
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* str := JSON.Dump( value [, replacer, space ] )
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* Parameter(s):
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* str [retval] - JSON representation of an AHK value
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* value [in] - any value(object, string, number)
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* replacer [in, opt] - function object, similar to JavaScript's
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* JSON.stringify() 'replacer' parameter
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* space [in, opt] - similar to JavaScript's JSON.stringify()
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* 'space' parameter
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*/
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class Dump extends JSON.Functor
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{
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Call(self, value, replacer:="", space:="")
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{
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this.rep := IsObject(replacer) ? replacer : ""
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this.gap := ""
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if (space) {
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static integer := "integer"
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if space is %integer%
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Loop, % ((n := Abs(space))>10 ? 10 : n)
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this.gap .= " "
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else
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this.gap := SubStr(space, 1, 10)
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this.indent := "`n"
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}
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return this.Str({"": value}, "")
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}
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Str(holder, key)
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{
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value := holder[key]
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if (this.rep)
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value := this.rep.Call(holder, key, value)
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if IsObject(value) {
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; Check object type, skip serialization for other object types such as
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; ComObject, Func, BoundFunc, FileObject, RegExMatchObject, Property, etc.
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static type := A_AhkVersion<"2" ? "" : Func("Type")
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if (type ? type.Call(value) == "Object" : ObjGetCapacity(value) != "") {
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if (this.gap) {
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stepback := this.indent
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this.indent .= this.gap
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}
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is_array := value.IsArray
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; Array() is not overridden, rollback to old method of
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; identifying array-like objects. Due to the use of a for-loop
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; sparse arrays such as '[1,,3]' are detected as objects({}).
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if (!is_array) {
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for i in value
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is_array := i == A_Index
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until !is_array
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}
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str := ""
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if (is_array) {
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Loop, % value.Length() {
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if (this.gap)
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str .= this.indent
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v := this.Str(value, A_Index)
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str .= (v != "") && value.HasKey(A_Index) ? v . "," : "null,"
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}
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} else {
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colon := this.gap ? ": " : ":"
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for k in value {
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v := this.Str(value, k)
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if (v != "") {
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if (this.gap)
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str .= this.indent
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str .= this.Quote(k) . colon . v . ","
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}
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}
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}
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if (str != "") {
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str := RTrim(str, ",")
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if (this.gap)
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str .= stepback
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}
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if (this.gap)
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this.indent := stepback
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return is_array ? "[" . str . "]" : "{" . str . "}"
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}
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} else ; is_number ? value : "value"
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return ObjGetCapacity([value], 1)=="" ? value : this.Quote(value)
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}
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Quote(string)
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{
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static q := Chr(34)
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if (string != "") {
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string := StrReplace(string, "\", "\\")
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; , string := StrReplace(string, "/", "\/") ; optional in ECMAScript
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, string := StrReplace(string, q, "\" . q)
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, string := StrReplace(string, "`b", "\b")
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, string := StrReplace(string, "`f", "\f")
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, string := StrReplace(string, "`n", "\n")
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, string := StrReplace(string, "`r", "\r")
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, string := StrReplace(string, "`t", "\t")
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static rx_escapable := A_AhkVersion<"2" ? "O)[^\x20-\x7e]" : "[^\x20-\x7e]"
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while RegExMatch(string, rx_escapable, m)
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string := StrReplace(string, m.Value, Format("\u{1:04x}", Ord(m.Value)))
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}
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return q . string . q
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}
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}
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/**
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* Property: Undefined
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* Proxy for 'undefined' type
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* Syntax:
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* undefined := JSON.Undefined
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* Remarks:
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* For use with reviver and replacer functions since AutoHotkey does not
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* have an 'undefined' type. Returning blank("") or 0 won't work since these
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* can't be distnguished from actual JSON values. This leaves us with objects.
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* The caller may return a non-serializable AHK objects such as ComObject,
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* Func, BoundFunc, FileObject, RegExMatchObject, and Property to mimic the
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* behavior of returning 'undefined' in JavaScript but for the sake of code
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* readability and convenience, it's better to do 'return JSON.Undefined'.
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* Internally, the property returns a ComObject with the variant type of VT_EMPTY.
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*/
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Undefined[]
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{
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get {
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static empty := {}, vt_empty := ComObject(0, &empty, 1)
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return vt_empty
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}
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}
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class Functor
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{
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__Call(method, args*)
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{
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; When casting to Call(), use a new instance of the "function object"
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; so as to avoid directly storing the properties(used across sub-methods)
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; into the "function object" itself.
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if IsObject(method)
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return (new this).Call(method, args*)
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else if (method == "")
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return (new this).Call(args*)
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}
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}
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} |