Reimplement QPDFObjectHandle::getJSON in terms of writeJSON

m-holger
1 parent 9379b768
Showing 31 changed files with 5 additions and 196 deletions
libqpdf/QPDFObjectHandle.cc
libqpdf/QPDF_Array.cc
libqpdf/QPDF_Bool.cc
libqpdf/QPDF_Destroyed.cc
libqpdf/QPDF_Dictionary.cc
libqpdf/QPDF_InlineImage.cc
libqpdf/QPDF_Integer.cc
libqpdf/QPDF_Name.cc
libqpdf/QPDF_Null.cc
libqpdf/QPDF_Operator.cc
libqpdf/QPDF_Real.cc
libqpdf/QPDF_Reserved.cc
libqpdf/QPDF_Stream.cc
libqpdf/QPDF_String.cc
libqpdf/QPDF_Unresolved.cc
libqpdf/qpdf/QPDFObject_private.hh
libqpdf/qpdf/QPDFValue.hh
libqpdf/qpdf/QPDF_Array.hh
libqpdf/qpdf/QPDF_Bool.hh
libqpdf/qpdf/QPDF_Destroyed.hh
@@ -1618,7 +1618,11 @@ QPDFObjectHandle::getJSON(int json_version, bool dereference_indirect)
     } else if (!dereference()) {
         throw std::logic_error("attempted to dereference an uninitialized QPDFObjectHandle");
     } else {
-        return obj->getJSON(json_version);
+        Pl_Buffer p{"json"};
+        JSON::Writer jw{&p, 0};
+        writeJSON(json_version, jw, dereference_indirect);
+        p.finish();
+        return JSON::parse(p.getString());
     }
 }
  
@@ -149,38 +149,6 @@ QPDF_Array::unparse()
     return result;
 }
  
-JSON
-QPDF_Array::getJSON(int json_version)
-{
-    static const JSON j_null = JSON::makeNull();
-    JSON j_array = JSON::makeArray();
-    if (sp) {
-        int next = 0;
-        for (auto& item: sp->elements) {
-            int key = item.first;
-            for (int j = next; j < key; ++j) {
-                j_array.addArrayElement(j_null);
-            }
-            auto og = item.second->getObjGen();
-            j_array.addArrayElement(
-                og.isIndirect() ? JSON::makeString(og.unparse(' ') + " R")
-                                : item.second->getJSON(json_version));
-            next = ++key;
-        }
-        for (int j = next; j < sp->size; ++j) {
-            j_array.addArrayElement(j_null);
-        }
-    } else {
-        for (auto const& item: elements) {
-            auto og = item->getObjGen();
-            j_array.addArrayElement(
-                og.isIndirect() ? JSON::makeString(og.unparse(' ') + " R")
-                                : item->getJSON(json_version));
-        }
-    }
-    return j_array;
-}
-
 void
 QPDF_Array::writeJSON(int json_version, JSON::Writer& p)
 {
@@ -26,12 +26,6 @@ QPDF_Bool::unparse()
     return (val ? "true" : "false");
 }
  
-JSON
-QPDF_Bool::getJSON(int json_version)
-{
-    return JSON::makeBool(this->val);
-}
-
 void
 QPDF_Bool::writeJSON(int json_version, JSON::Writer& p)
 {
@@ -28,13 +28,6 @@ QPDF_Destroyed::unparse()
     return "";
 }
  
-JSON
-QPDF_Destroyed::getJSON(int json_version)
-{
-    throw std::logic_error("attempted to get JSON from a QPDFObjectHandle from a destroyed QPDF");
-    return JSON::makeNull();
-}
-
 void
 QPDF_Destroyed::writeJSON(int json_version, JSON::Writer& p)
 {
@@ -68,26 +68,6 @@ QPDF_Dictionary::unparse()
     return result;
 }
  
-JSON
-QPDF_Dictionary::getJSON(int json_version)
-{
-    JSON j = JSON::makeDictionary();
-    for (auto& iter: this->items) {
-        if (!iter.second.isNull()) {
-            if (json_version == 1) {
-                j.addDictionaryMember(
-                    QPDF_Name::normalizeName(iter.first), iter.second.getJSON(json_version));
-            } else if (auto res = QPDF_Name::analyzeJSONEncoding(iter.first); res.first) {
-                j.addDictionaryMember(iter.first, iter.second.getJSON(json_version));
-            } else {
-                j.addDictionaryMember(
-                    "n:" + QPDF_Name::normalizeName(iter.first), iter.second.getJSON(json_version));
-            }
-        }
-    }
-    return j;
-}
-
 void
 QPDF_Dictionary::writeJSON(int json_version, JSON::Writer& p)
 {
@@ -26,12 +26,6 @@ QPDF_InlineImage::unparse()
     return this->val;
 }
  
-JSON
-QPDF_InlineImage::getJSON(int json_version)
-{
-    return JSON::makeNull();
-}
-
 void
 QPDF_InlineImage::writeJSON(int json_version, JSON::Writer& p)
 {
@@ -27,12 +27,6 @@ QPDF_Integer::unparse()
     return std::to_string(this->val);
 }
  
-JSON
-QPDF_Integer::getJSON(int json_version)
-{
-    return JSON::makeInt(this->val);
-}
-
 void
 QPDF_Integer::writeJSON(int json_version, JSON::Writer& p)
 {
@@ -103,20 +103,6 @@ QPDF_Name::analyzeJSONEncoding(const std::string&amp; name)
     return {tail == 0, !needs_escaping};
 }
  
-JSON
-QPDF_Name::getJSON(int json_version)
-{
-    if (json_version == 1) {
-        return JSON::makeString(normalizeName(this->name));
-    } else {
-        if (auto res = analyzeJSONEncoding(name); res.first) {
-            return JSON::makeString(name);
-        } else {
-            return JSON::makeString("n:" + normalizeName(name));
-        }
-    }
-}
-
 void
 QPDF_Name::writeJSON(int json_version, JSON::Writer& p)
 {
@@ -44,13 +44,6 @@ QPDF_Null::unparse()
     return "null";
 }
  
-JSON
-QPDF_Null::getJSON(int json_version)
-{
-    // If this is updated, QPDF_Array::getJSON must also be updated.
-    return JSON::makeNull();
-}
-
 void
 QPDF_Null::writeJSON(int json_version, JSON::Writer& p)
 {
@@ -26,12 +26,6 @@ QPDF_Operator::unparse()
     return val;
 }
  
-JSON
-QPDF_Operator::getJSON(int json_version)
-{
-    return JSON::makeNull();
-}
-
 void
 QPDF_Operator::writeJSON(int json_version, JSON::Writer& p)
 {
@@ -39,25 +39,6 @@ QPDF_Real::unparse()
     return this->val;
 }
  
-JSON
-QPDF_Real::getJSON(int json_version)
-{
-    // While PDF allows .x or -.x, JSON does not. Rather than converting from string to double and
-    // back, just handle this as a special case for JSON.
-    std::string result;
-    if (this->val.length() == 0) {
-        // Can't really happen...
-        result = "0";
-    } else if (this->val.at(0) == '.') {
-        result = "0" + this->val;
-    } else if ((this->val.length() >= 2) && (this->val.at(0) == '-') && (this->val.at(1) == '.')) {
-        result = "-0." + this->val.substr(2);
-    } else {
-        result = this->val;
-    }
-    return JSON::makeNumber(result);
-}
-
 void
 QPDF_Real::writeJSON(int json_version, JSON::Writer& p)
 {
@@ -26,13 +26,6 @@ QPDF_Reserved::unparse()
     return "";
 }
  
-JSON
-QPDF_Reserved::getJSON(int json_version)
-{
-    throw std::logic_error("QPDFObjectHandle: attempting to get JSON from a reserved object");
-    return JSON::makeNull();
-}
-
 void
 QPDF_Reserved::writeJSON(int json_version, JSON::Writer& p)
 {
@@ -177,15 +177,6 @@ QPDF_Stream::unparse()
     return og.unparse(' ') + " R";
 }
  
-JSON
-QPDF_Stream::getJSON(int json_version)
-{
-    if (json_version == 1) {
-        return this->stream_dict.getJSON(json_version);
-    }
-    return getStreamJSON(json_version, qpdf_sj_none, qpdf_dl_none, nullptr, "");
-}
-
 void
 QPDF_Stream::writeJSON(int json_version, JSON::Writer& p)
 {
@@ -46,35 +46,6 @@ QPDF_String::unparse()
     return unparse(false);
 }
  
-JSON
-QPDF_String::getJSON(int json_version)
-{
-    if (json_version == 1) {
-        return JSON::makeString(getUTF8Val());
-    }
-    // See if we can unambiguously represent as Unicode.
-    bool is_unicode = false;
-    std::string result;
-    std::string candidate = getUTF8Val();
-    if (QUtil::is_utf16(this->val) || QUtil::is_explicit_utf8(this->val)) {
-        is_unicode = true;
-        result = candidate;
-    } else if (!useHexString()) {
-        std::string test;
-        if (QUtil::utf8_to_pdf_doc(candidate, test, '?') && (test == this->val)) {
-            // This is a PDF-doc string that can be losslessly encoded as Unicode.
-            is_unicode = true;
-            result = candidate;
-        }
-    }
-    if (is_unicode) {
-        result = "u:" + result;
-    } else {
-        result = "b:" + QUtil::hex_encode(this->val);
-    }
-    return JSON::makeString(result);
-}
-
 void
 QPDF_String::writeJSON(int json_version, JSON::Writer& p)
 {
@@ -27,13 +27,6 @@ QPDF_Unresolved::unparse()
     return "";
 }
  
-JSON
-QPDF_Unresolved::getJSON(int json_version)
-{
-    throw std::logic_error("attempted to get JSON from an unresolved QPDFObjectHandle");
-    return JSON::makeNull();
-}
-
 void
 QPDF_Unresolved::writeJSON(int json_version, JSON::Writer& p)
 {
@@ -33,11 +33,6 @@ class QPDFObject
     {
         return value->unparse();
     }
-    JSON
-    getJSON(int json_version)
-    {
-        return value->getJSON(json_version);
-    }
     void
     writeJSON(int json_version, JSON::Writer& p)
     {
@@ -24,7 +24,6 @@ class QPDFValue: public std::enable_shared_from_this&lt;QPDFValue&gt;
  
     virtual std::shared_ptr<QPDFObject> copy(bool shallow = false) = 0;
     virtual std::string unparse() = 0;
-    virtual JSON getJSON(int json_version) = 0;
     virtual void writeJSON(int json_version, JSON::Writer& p) = 0;
  
     struct JSON_Descr
@@ -22,7 +22,6 @@ class QPDF_Array: public QPDFValue
     create(std::vector<std::shared_ptr<QPDFObject>>&& items, bool sparse);
     std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
     std::string unparse() override;
-    JSON getJSON(int json_version) override;
     void writeJSON(int json_version, JSON::Writer& p) override;
     void disconnect() override;
  
@@ -10,7 +10,6 @@ class QPDF_Bool: public QPDFValue
     static std::shared_ptr<QPDFObject> create(bool val);
     std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
     std::string unparse() override;
-    JSON getJSON(int json_version) override;
     void writeJSON(int json_version, JSON::Writer& p) override;
  
     bool getVal() const;
@@ -9,7 +9,6 @@ class QPDF_Destroyed: public QPDFValue
     ~QPDF_Destroyed() override = default;
     std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
     std::string unparse() override;
-    JSON getJSON(int json_version) override;
     void writeJSON(int json_version, JSON::Writer& p) override;
     static std::shared_ptr<QPDFValue> getInstance();
  
@@ -16,7 +16,6 @@ class QPDF_Dictionary: public QPDFValue
     static std::shared_ptr<QPDFObject> create(std::map<std::string, QPDFObjectHandle>&& items);
     std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
     std::string unparse() override;
-    JSON getJSON(int json_version) override;
     void writeJSON(int json_version, JSON::Writer& p) override;
     void disconnect() override;
  
@@ -10,7 +10,6 @@ class QPDF_InlineImage: public QPDFValue
     static std::shared_ptr<QPDFObject> create(std::string const& val);
     std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
     std::string unparse() override;
-    JSON getJSON(int json_version) override;
     void writeJSON(int json_version, JSON::Writer& p) override;
     std::string
     getStringValue() const override
@@ -10,7 +10,6 @@ class QPDF_Integer: public QPDFValue
     static std::shared_ptr<QPDFObject> create(long long value);
     std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
     std::string unparse() override;
-    JSON getJSON(int json_version) override;
     void writeJSON(int json_version, JSON::Writer& p) override;
     long long getVal() const;
  
@@ -10,7 +10,6 @@ class QPDF_Name: public QPDFValue
     static std::shared_ptr<QPDFObject> create(std::string const& name);
     std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
     std::string unparse() override;
-    JSON getJSON(int json_version) override;
     void writeJSON(int json_version, JSON::Writer& p) override;
  
     // Put # into strings with characters unsuitable for name token
@@ -18,7 +18,6 @@ class QPDF_Null: public QPDFValue
         std::string var_descr);
     std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
     std::string unparse() override;
-    JSON getJSON(int json_version) override;
     void writeJSON(int json_version, JSON::Writer& p) override;
  
   private:
@@ -10,7 +10,6 @@ class QPDF_Operator: public QPDFValue
     static std::shared_ptr<QPDFObject> create(std::string const& val);
     std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
     std::string unparse() override;
-    JSON getJSON(int json_version) override;
     void writeJSON(int json_version, JSON::Writer& p) override;
     std::string
     getStringValue() const override
@@ -12,7 +12,6 @@ class QPDF_Real: public QPDFValue
     create(double value, int decimal_places, bool trim_trailing_zeroes);
     std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
     std::string unparse() override;
-    JSON getJSON(int json_version) override;
     void writeJSON(int json_version, JSON::Writer& p) override;
     std::string
     getStringValue() const override
@@ -10,7 +10,6 @@ class QPDF_Reserved: public QPDFValue
     static std::shared_ptr<QPDFObject> create();
     std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
     std::string unparse() override;
-    JSON getJSON(int json_version) override;
     void writeJSON(int json_version, JSON::Writer& p) override;
  
   private:
@@ -25,7 +25,6 @@ class QPDF_Stream: public QPDFValue
         size_t length);
     std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
     std::string unparse() override;
-    JSON getJSON(int json_version) override;
     void writeJSON(int json_version, JSON::Writer& p) override;
     void setDescription(
         QPDF*, std::shared_ptr<QPDFValue::Description>& description, qpdf_offset_t offset) override;
@@ -16,7 +16,6 @@ class QPDF_String: public QPDFValue
     std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
     std::string unparse() override;
     std::string unparse(bool force_binary);
-    JSON getJSON(int json_version) override;
     void writeJSON(int json_version, JSON::Writer& p) override;
     std::string getUTF8Val() const;
     std::string
@@ -10,7 +10,6 @@ class QPDF_Unresolved: public QPDFValue
     static std::shared_ptr<QPDFObject> create(QPDF* qpdf, QPDFObjGen const& og);
     std::shared_ptr<QPDFObject> copy(bool shallow = false) override;
     std::string unparse() override;
-    JSON getJSON(int json_version) override;
     void writeJSON(int json_version, JSON::Writer& p) override;
  
   private: