Annotation of parser3/src/types/pa_wcontext.h, revision 1.39
1.12 paf 1: /** @file
2: Parser: write context class decl.
3:
1.26 paf 4: Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
1.27 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.1 paf 6: */
7:
8: #ifndef PA_WCONTEXT_H
9: #define PA_WCONTEXT_H
1.33 paf 10:
1.39 ! paf 11: static const char* IDENT_WCONTEXT_H="$Date: 2002/08/29 12:22:48 $";
1.1 paf 12:
13: #include "pa_value.h"
14: #include "pa_vstring.h"
15: #include "pa_vhash.h"
16:
17: class Request;
18:
1.29 paf 19: class StringOrValue {
20: public:
21: StringOrValue() : fstring(0), fvalue(0) {}
22: /// anticipating either String or Value [must not be 0&0]
1.30 paf 23: StringOrValue(const String *astring, Value *avalue) : fstring(astring), fvalue(avalue) {}
24: void set_string(const String& astring) { fstring=&astring; }
1.29 paf 25: void set_value(Value& avalue) { fvalue=&avalue; }
1.31 paf 26: const String *get_string() { return fstring; }
27: Value *get_value() { return fvalue; }
1.29 paf 28: Value& as_value() const {
29: return *(fvalue?fvalue:new(fstring->pool()) VString(*fstring));
30: }
31: const String& as_string() const {
32: return fstring?*fstring:fvalue->as_string();
33: }
34: private:
1.30 paf 35: const String *fstring;
1.29 paf 36: Value *fvalue;
37: };
38:
1.12 paf 39: /** Write context
40: they do different write()s here, later picking up the result
41: @see Request::wcontext
42: */
1.1 paf 43: class WContext : public Value {
1.18 paf 44: friend class Request;
1.19 paf 45:
1.1 paf 46: public: // Value
47:
48: const char *type() const { return "wcontext"; }
1.12 paf 49: /// WContext: accumulated fstring
1.1 paf 50: const String *get_string() { return &fstring; };
51:
1.12 paf 52: /// WContext: none yet | transparent
1.5 paf 53: VStateless_class *get_class() { return fvalue?fvalue->get_class():0; }
1.1 paf 54:
55: public: // WContext
56:
1.12 paf 57: /// appends a fstring to result
1.35 paf 58: virtual void write(const String& astring, uchar lang) {
59: fstring.append(astring, lang);
60: }
1.32 paf 61: /// writes Value; raises an error if already, providing origin
1.35 paf 62: virtual void write(Value& avalue, const String* origin=0);
1.1 paf 63:
1.12 paf 64: /**
65: if value is VString writes fstring,
1.32 paf 66: else writes Value; raises an error if already, providing origin
67: */
1.35 paf 68: void write(Value& avalue, uchar lang, const String* origin=0) {
1.32 paf 69: if(const String *fstring=avalue.get_string())
70: write(*fstring, lang);
71: else
72: write(avalue, origin);
73: }
1.1 paf 74:
1.12 paf 75: /**
76: retrives the resulting value
1.29 paf 77: that can be String if value==0 or the Value object
1.12 paf 78: wmethod_frame first checks for $result and if there is one, returns it instead
79: */
1.29 paf 80: virtual StringOrValue result() {
81: return fvalue?StringOrValue(0, fvalue):StringOrValue(&fstring, 0);
1.7 paf 82: }
83:
1.39 ! paf 84: void attach_junction(Junction& ajunction) {
! 85: junctions+=&ajunction;
! 86: }
! 87:
1.1 paf 88: public: // usage
89:
1.39 ! paf 90: WContext(Pool& apool, Value *avalue, WContext *aparent) : Value(apool),
1.7 paf 91: fstring(*new(apool) String(apool)),
1.39 ! paf 92: fvalue(avalue),
! 93: fparent(aparent),
! 94: junctions(apool) {
1.20 paf 95: flags.constructing=
96: flags.entered_class=
97: flags.entered_object=0;
1.1 paf 98: }
1.39 ! paf 99: ~WContext() {
! 100: detach_junctions();
! 101: }
1.1 paf 102:
1.20 paf 103: void set_constructing(bool aconstructing) { flags.constructing=aconstructing?1:0; }
104: bool get_constructing() { return flags.constructing!=0; }
1.19 paf 105:
1.28 paf 106: void set_in_expression(bool ain_expression) { flags.in_expression=ain_expression?1:0; }
107: bool get_in_expression() { return flags.in_expression!=0; }
108:
1.25 paf 109: void set_somebody_entered_some_class() { flags.entered_class=1; }
1.20 paf 110: bool get_somebody_entered_some_class() { return flags.entered_class!=0; }
1.14 paf 111:
1.39 ! paf 112: private:
! 113:
! 114: void detach_junctions();
! 115:
1.1 paf 116: protected:
1.7 paf 117: String& fstring;
1.19 paf 118: Value *fvalue;
1.1 paf 119: private:
1.19 paf 120: struct {
1.20 paf 121: int constructing:1;
1.28 paf 122: int in_expression:1;
1.20 paf 123: int entered_object:1;
124: int entered_class:1;
125: } flags;
1.39 ! paf 126:
! 127: private:
! 128:
! 129: WContext *fparent;
! 130: Array junctions;
1.38 paf 131:
1.1 paf 132: };
133:
134: #endif
E-mail: