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https://github.com/qpdf/qpdf.git
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930eade6d3
When generating appearance streams for variable text annotations, properly handle the cases of there being no appearance dictionary, no appearance stream, or an appearance stream with no BMC..EMC marker.
875 lines
23 KiB
C++
875 lines
23 KiB
C++
#include <qpdf/QPDFFormFieldObjectHelper.hh>
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#include <qpdf/QTC.hh>
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#include <qpdf/QPDFAcroFormDocumentHelper.hh>
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#include <qpdf/QPDFAnnotationObjectHelper.hh>
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#include <qpdf/QUtil.hh>
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#include <qpdf/Pl_QPDFTokenizer.hh>
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#include <stdlib.h>
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QPDFFormFieldObjectHelper::Members::~Members()
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{
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}
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QPDFFormFieldObjectHelper::Members::Members()
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{
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}
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QPDFFormFieldObjectHelper::QPDFFormFieldObjectHelper(QPDFObjectHandle oh) :
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QPDFObjectHelper(oh),
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m(new Members())
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{
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}
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QPDFFormFieldObjectHelper::QPDFFormFieldObjectHelper() :
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QPDFObjectHelper(QPDFObjectHandle::newNull()),
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m(new Members())
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{
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}
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bool
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QPDFFormFieldObjectHelper::isNull()
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{
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return this->oh.isNull();
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}
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QPDFFormFieldObjectHelper
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QPDFFormFieldObjectHelper::getParent()
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{
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return this->oh.getKey("/Parent"); // may be null
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}
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QPDFObjectHandle
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QPDFFormFieldObjectHelper::getInheritableFieldValue(std::string const& name)
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{
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QPDFObjectHandle node = this->oh;
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QPDFObjectHandle result(node.getKey(name));
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std::set<QPDFObjGen> seen;
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while (result.isNull() && node.hasKey("/Parent"))
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{
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seen.insert(node.getObjGen());
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node = node.getKey("/Parent");
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if (seen.count(node.getObjGen()))
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{
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break;
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}
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result = node.getKey(name);
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if (! result.isNull())
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{
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QTC::TC("qpdf", "QPDFFormFieldObjectHelper non-trivial inheritance");
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}
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}
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return result;
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}
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std::string
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QPDFFormFieldObjectHelper::getInheritableFieldValueAsString(
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std::string const& name)
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{
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QPDFObjectHandle fv = getInheritableFieldValue(name);
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std::string result;
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if (fv.isString())
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{
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result = fv.getUTF8Value();
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}
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return result;
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}
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std::string
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QPDFFormFieldObjectHelper::getInheritableFieldValueAsName(
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std::string const& name)
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{
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QPDFObjectHandle fv = getInheritableFieldValue(name);
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std::string result;
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if (fv.isName())
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{
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result = fv.getName();
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}
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return result;
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}
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std::string
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QPDFFormFieldObjectHelper::getFieldType()
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{
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return getInheritableFieldValueAsName("/FT");
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}
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std::string
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QPDFFormFieldObjectHelper::getFullyQualifiedName()
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{
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std::string result;
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QPDFObjectHandle node = this->oh;
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std::set<QPDFObjGen> seen;
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while ((! node.isNull()) && (seen.count(node.getObjGen()) == 0))
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{
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if (node.getKey("/T").isString())
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{
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if (! result.empty())
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{
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QTC::TC("qpdf", "QPDFFormFieldObjectHelper non-trivial qualified name");
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result = "." + result;
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}
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result = node.getKey("/T").getUTF8Value() + result;
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}
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seen.insert(node.getObjGen());
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node = node.getKey("/Parent");
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}
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return result;
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}
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std::string
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QPDFFormFieldObjectHelper::getPartialName()
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{
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std::string result;
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if (this->oh.getKey("/T").isString())
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{
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result = this->oh.getKey("/T").getUTF8Value();
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}
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return result;
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}
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std::string
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QPDFFormFieldObjectHelper::getAlternativeName()
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{
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if (this->oh.getKey("/TU").isString())
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{
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QTC::TC("qpdf", "QPDFFormFieldObjectHelper TU present");
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return this->oh.getKey("/TU").getUTF8Value();
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}
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QTC::TC("qpdf", "QPDFFormFieldObjectHelper TU absent");
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return getFullyQualifiedName();
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}
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std::string
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QPDFFormFieldObjectHelper::getMappingName()
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{
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if (this->oh.getKey("/TM").isString())
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{
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QTC::TC("qpdf", "QPDFFormFieldObjectHelper TM present");
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return this->oh.getKey("/TM").getUTF8Value();
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}
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QTC::TC("qpdf", "QPDFFormFieldObjectHelper TM absent");
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return getAlternativeName();
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}
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QPDFObjectHandle
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QPDFFormFieldObjectHelper::getValue()
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{
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return getInheritableFieldValue("/V");
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}
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std::string
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QPDFFormFieldObjectHelper::getValueAsString()
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{
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return getInheritableFieldValueAsString("/V");
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}
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QPDFObjectHandle
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QPDFFormFieldObjectHelper::getDefaultValue()
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{
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return getInheritableFieldValue("/DV");
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}
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std::string
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QPDFFormFieldObjectHelper::getDefaultValueAsString()
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{
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return getInheritableFieldValueAsString("/DV");
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}
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std::string
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QPDFFormFieldObjectHelper::getDefaultAppearance()
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{
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return getInheritableFieldValueAsString("/DA");
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}
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int
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QPDFFormFieldObjectHelper::getQuadding()
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{
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int result = 0;
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QPDFObjectHandle fv = getInheritableFieldValue("/Q");
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if (fv.isInteger())
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{
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QTC::TC("qpdf", "QPDFFormFieldObjectHelper Q present");
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result = static_cast<int>(fv.getIntValue());
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}
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return result;
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}
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int
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QPDFFormFieldObjectHelper::getFlags()
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{
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QPDFObjectHandle f = getInheritableFieldValue("/Ff");
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return f.isInteger() ? f.getIntValue() : 0;
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}
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bool
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QPDFFormFieldObjectHelper::isText()
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{
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return (getFieldType() == "/Tx");
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}
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bool
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QPDFFormFieldObjectHelper::isCheckbox()
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{
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return ((getFieldType() == "/Btn") &&
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((getFlags() & (ff_btn_radio | ff_btn_pushbutton)) == 0));
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}
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bool
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QPDFFormFieldObjectHelper::isRadioButton()
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{
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return ((getFieldType() == "/Btn") &&
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((getFlags() & ff_btn_radio) == ff_btn_radio));
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}
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bool
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QPDFFormFieldObjectHelper::isPushbutton()
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{
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return ((getFieldType() == "/Btn") &&
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((getFlags() & ff_btn_pushbutton) == ff_btn_pushbutton));
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}
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bool
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QPDFFormFieldObjectHelper::isChoice()
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{
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return (getFieldType() == "/Ch");
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}
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std::vector<std::string>
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QPDFFormFieldObjectHelper::getChoices()
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{
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std::vector<std::string> result;
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if (! isChoice())
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{
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return result;
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}
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QPDFObjectHandle opt = getInheritableFieldValue("/Opt");
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if (opt.isArray())
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{
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size_t n = opt.getArrayNItems();
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for (size_t i = 0; i < n; ++i)
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{
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QPDFObjectHandle item = opt.getArrayItem(i);
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if (item.isString())
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{
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result.push_back(item.getUTF8Value());
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}
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}
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}
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return result;
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}
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void
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QPDFFormFieldObjectHelper::setFieldAttribute(
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std::string const& key, QPDFObjectHandle value)
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{
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this->oh.replaceKey(key, value);
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}
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void
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QPDFFormFieldObjectHelper::setFieldAttribute(
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std::string const& key, std::string const& utf8_value)
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{
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this->oh.replaceKey(key, QPDFObjectHandle::newUnicodeString(utf8_value));
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}
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void
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QPDFFormFieldObjectHelper::setV(
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QPDFObjectHandle value, bool need_appearances)
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{
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if (getFieldType() == "/Btn")
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{
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if (isCheckbox())
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{
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bool okay = false;
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if (value.isName())
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{
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std::string name = value.getName();
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if ((name == "/Yes") || (name == "/Off"))
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{
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okay = true;
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setCheckBoxValue((name == "/Yes"));
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}
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}
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if (! okay)
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{
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this->oh.warnIfPossible(
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"ignoring attempt to set a checkbox field to a"
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" value of other than /Yes or /Off");
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}
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}
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else if (isRadioButton())
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{
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if (value.isName())
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{
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setRadioButtonValue(value);
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}
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else
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{
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this->oh.warnIfPossible(
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"ignoring attempt to set a radio button field to"
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" an object that is not a name");
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}
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}
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else if (isPushbutton())
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{
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this->oh.warnIfPossible(
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"ignoring attempt set the value of a pushbutton field");
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}
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return;
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}
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if (value.isString())
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{
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setFieldAttribute(
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"/V", QPDFObjectHandle::newUnicodeString(value.getUTF8Value()));
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}
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else
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{
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setFieldAttribute("/V", value);
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}
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if (need_appearances)
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{
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QPDF* qpdf = this->oh.getOwningQPDF();
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if (! qpdf)
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{
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throw std::logic_error(
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"QPDFFormFieldObjectHelper::setV called with"
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" need_appearances = true on an object that is"
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" not associated with an owning QPDF");
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}
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QPDFAcroFormDocumentHelper(*qpdf).setNeedAppearances(true);
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}
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}
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void
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QPDFFormFieldObjectHelper::setV(
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std::string const& utf8_value, bool need_appearances)
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{
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setV(QPDFObjectHandle::newUnicodeString(utf8_value),
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need_appearances);
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}
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void
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QPDFFormFieldObjectHelper::setRadioButtonValue(QPDFObjectHandle name)
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{
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// Set the value of a radio button field. This has the following
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// specific behavior:
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// * If this is a radio button field that has a parent that is
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// also a radio button field and has no explicit /V, call itself
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// on the parent
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// * If this is a radio button field with children, set /V to the
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// given value. Then, for each child, if the child has the
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// specified value as one of its keys in the /N subdictionary of
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// its /AP (i.e. its normal appearance stream dictionary), set
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// /AS to name; otherwise, if /Off is a member, set /AS to /Off.
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// Note that we never turn on /NeedAppearances when setting a
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// radio button field.
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QPDFObjectHandle parent = this->oh.getKey("/Parent");
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if (parent.isDictionary() && parent.getKey("/Parent").isNull())
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{
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QPDFFormFieldObjectHelper ph(parent);
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if (ph.isRadioButton())
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{
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// This is most likely one of the individual buttons. Try
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// calling on the parent.
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QTC::TC("qpdf", "QPDFFormFieldObjectHelper set parent radio button");
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ph.setRadioButtonValue(name);
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return;
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}
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}
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QPDFObjectHandle kids = this->oh.getKey("/Kids");
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if (! (isRadioButton() && parent.isNull() && kids.isArray()))
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{
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this->oh.warnIfPossible("don't know how to set the value"
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" of this field as a radio button");
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return;
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}
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setFieldAttribute("/V", name);
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int nkids = kids.getArrayNItems();
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for (int i = 0; i < nkids; ++i)
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{
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QPDFObjectHandle kid = kids.getArrayItem(i);
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QPDFObjectHandle AP = kid.getKey("/AP");
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QPDFObjectHandle annot;
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if (AP.isNull())
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{
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// The widget may be below. If there is more than one,
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// just find the first one.
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QPDFObjectHandle grandkids = kid.getKey("/Kids");
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if (grandkids.isArray())
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{
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int ngrandkids = grandkids.getArrayNItems();
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for (int j = 0; j < ngrandkids; ++j)
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{
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QPDFObjectHandle grandkid = grandkids.getArrayItem(j);
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AP = grandkid.getKey("/AP");
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if (! AP.isNull())
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{
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QTC::TC("qpdf", "QPDFFormFieldObjectHelper radio button grandkid widget");
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annot = grandkid;
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break;
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}
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}
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}
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}
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else
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{
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annot = kid;
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}
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if (! annot.isInitialized())
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{
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QTC::TC("qpdf", "QPDFObjectHandle broken radio button");
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this->oh.warnIfPossible(
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"unable to set the value of this radio button");
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continue;
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}
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if (AP.isDictionary() &&
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AP.getKey("/N").isDictionary() &&
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AP.getKey("/N").hasKey(name.getName()))
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{
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QTC::TC("qpdf", "QPDFFormFieldObjectHelper turn on radio button");
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annot.replaceKey("/AS", name);
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}
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else
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{
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QTC::TC("qpdf", "QPDFFormFieldObjectHelper turn off radio button");
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annot.replaceKey("/AS", QPDFObjectHandle::newName("/Off"));
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}
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}
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}
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void
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QPDFFormFieldObjectHelper::setCheckBoxValue(bool value)
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{
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// Set /AS to /Yes or /Off in addition to setting /V.
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QPDFObjectHandle name =
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QPDFObjectHandle::newName(value ? "/Yes" : "/Off");
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setFieldAttribute("/V", name);
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QPDFObjectHandle AP = this->oh.getKey("/AP");
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QPDFObjectHandle annot;
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if (AP.isNull())
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{
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// The widget may be below. If there is more than one, just
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// find the first one.
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QPDFObjectHandle kids = this->oh.getKey("/Kids");
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if (kids.isArray())
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{
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int nkids = kids.getArrayNItems();
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for (int i = 0; i < nkids; ++i)
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{
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QPDFObjectHandle kid = kids.getArrayItem(i);
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AP = kid.getKey("/AP");
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if (! AP.isNull())
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{
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QTC::TC("qpdf", "QPDFFormFieldObjectHelper checkbox kid widget");
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annot = kid;
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break;
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}
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}
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}
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}
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else
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{
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annot = this->oh;
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}
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if (! annot.isInitialized())
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{
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QTC::TC("qpdf", "QPDFObjectHandle broken checkbox");
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this->oh.warnIfPossible(
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"unable to set the value of this checkbox");
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return;
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}
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QTC::TC("qpdf", "QPDFFormFieldObjectHelper set checkbox AS");
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annot.replaceKey("/AS", name);
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}
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void
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QPDFFormFieldObjectHelper::generateAppearance(QPDFAnnotationObjectHelper& aoh)
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{
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std::string ft = getFieldType();
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// Ignore field types we don't know how to generate appearances
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// for. Button fields don't really need them -- see code in
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// QPDFAcroFormDocumentHelper::generateAppearancesIfNeeded.
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if ((ft == "/Tx") || (ft == "/Ch"))
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{
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generateTextAppearance(aoh);
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}
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}
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class ValueSetter: public QPDFObjectHandle::TokenFilter
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{
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public:
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ValueSetter(std::string const& DA, std::string const& V,
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std::vector<std::string> const& opt, double tf,
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QPDFObjectHandle::Rectangle const& bbox);
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virtual ~ValueSetter()
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{
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}
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virtual void handleToken(QPDFTokenizer::Token const&);
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virtual void handleEOF();
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void writeAppearance();
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private:
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std::string DA;
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std::string V;
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std::vector<std::string> opt;
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double tf;
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QPDFObjectHandle::Rectangle bbox;
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enum { st_top, st_bmc, st_emc, st_end } state;
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bool replaced;
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};
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ValueSetter::ValueSetter(std::string const& DA, std::string const& V,
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std::vector<std::string> const& opt, double tf,
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QPDFObjectHandle::Rectangle const& bbox) :
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DA(DA),
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V(V),
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opt(opt),
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tf(tf),
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bbox(bbox),
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state(st_top),
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replaced(false)
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{
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}
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void
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ValueSetter::handleToken(QPDFTokenizer::Token const& token)
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{
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QPDFTokenizer::token_type_e ttype = token.getType();
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std::string value = token.getValue();
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bool do_replace = false;
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switch (state)
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{
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case st_top:
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writeToken(token);
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if ((ttype == QPDFTokenizer::tt_word) && (value == "BMC"))
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{
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state = st_bmc;
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}
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break;
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case st_bmc:
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if ((ttype == QPDFTokenizer::tt_space) ||
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(ttype == QPDFTokenizer::tt_comment))
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{
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writeToken(token);
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}
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else
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{
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state = st_emc;
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}
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// fall through to emc
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case st_emc:
|
|
if ((ttype == QPDFTokenizer::tt_word) && (value == "EMC"))
|
|
{
|
|
do_replace = true;
|
|
state = st_end;
|
|
}
|
|
break;
|
|
|
|
case st_end:
|
|
writeToken(token);
|
|
break;
|
|
}
|
|
if (do_replace)
|
|
{
|
|
writeAppearance();
|
|
}
|
|
}
|
|
|
|
void
|
|
ValueSetter::handleEOF()
|
|
{
|
|
if (! this->replaced)
|
|
{
|
|
QTC::TC("qpdf", "QPDFFormFieldObjectHelper replaced BMC at EOF");
|
|
write("/Tx BMC\n");
|
|
writeAppearance();
|
|
}
|
|
}
|
|
|
|
void
|
|
ValueSetter::writeAppearance()
|
|
{
|
|
this->replaced = true;
|
|
|
|
// This code does not take quadding into consideration because
|
|
// doing so requires font metric information, which we don't
|
|
// have in many cases.
|
|
|
|
double tfh = 1.2 * tf;
|
|
int dx = 1;
|
|
|
|
// Write one or more lines, centered vertically, possibly with
|
|
// one row highlighted.
|
|
|
|
size_t max_rows = static_cast<size_t>((bbox.ury - bbox.lly) / tfh);
|
|
bool highlight = false;
|
|
size_t highlight_idx = 0;
|
|
|
|
std::vector<std::string> lines;
|
|
if (opt.empty() || (max_rows < 2))
|
|
{
|
|
lines.push_back(V);
|
|
}
|
|
else
|
|
{
|
|
// Figure out what rows to write
|
|
size_t nopt = opt.size();
|
|
size_t found_idx = 0;
|
|
bool found = false;
|
|
for (found_idx = 0; found_idx < nopt; ++found_idx)
|
|
{
|
|
if (opt.at(found_idx) == V)
|
|
{
|
|
found = true;
|
|
break;
|
|
}
|
|
}
|
|
if (found)
|
|
{
|
|
// Try to make the found item the second one, but
|
|
// adjust for under/overflow.
|
|
int wanted_first = found_idx - 1;
|
|
int wanted_last = found_idx + max_rows - 2;
|
|
QTC::TC("qpdf", "QPDFFormFieldObjectHelper list found");
|
|
while (wanted_first < 0)
|
|
{
|
|
QTC::TC("qpdf", "QPDFFormFieldObjectHelper list first too low");
|
|
++wanted_first;
|
|
++wanted_last;
|
|
}
|
|
while (wanted_last >= static_cast<int>(nopt))
|
|
{
|
|
QTC::TC("qpdf", "QPDFFormFieldObjectHelper list last too high");
|
|
if (wanted_first > 0)
|
|
{
|
|
--wanted_first;
|
|
}
|
|
--wanted_last;
|
|
}
|
|
highlight = true;
|
|
highlight_idx = found_idx - wanted_first;
|
|
for (int i = wanted_first; i <= wanted_last; ++i)
|
|
{
|
|
lines.push_back(opt.at(i));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
QTC::TC("qpdf", "QPDFFormFieldObjectHelper list not found");
|
|
// include our value and the first n-1 rows
|
|
highlight_idx = 0;
|
|
highlight = true;
|
|
lines.push_back(V);
|
|
for (size_t i = 0; ((i < nopt) && (i < (max_rows - 1))); ++i)
|
|
{
|
|
lines.push_back(opt.at(i));
|
|
}
|
|
}
|
|
}
|
|
|
|
// Write the lines centered vertically, highlighting if needed
|
|
size_t nlines = lines.size();
|
|
double dy = bbox.ury - ((bbox.ury - bbox.lly - (nlines * tfh)) / 2.0);
|
|
write(DA + "\nq\n");
|
|
if (highlight)
|
|
{
|
|
write("q\n0.85 0.85 0.85 rg\n" +
|
|
QUtil::int_to_string(bbox.llx) + " " +
|
|
QUtil::double_to_string(bbox.lly + dy -
|
|
(tfh * (highlight_idx + 1))) + " " +
|
|
QUtil::int_to_string(bbox.urx - bbox.llx) + " " +
|
|
QUtil::double_to_string(tfh) +
|
|
" re f\nQ\n");
|
|
}
|
|
dy += 0.2 * tf;
|
|
for (size_t i = 0; i < nlines; ++i)
|
|
{
|
|
dy -= tfh;
|
|
write("BT\n" +
|
|
QUtil::int_to_string(bbox.llx + dx) + " " +
|
|
QUtil::double_to_string(bbox.lly + dy) + " Td\n" +
|
|
QPDFObjectHandle::newString(lines.at(i)).unparse() +
|
|
" Tj\nET\n");
|
|
}
|
|
write("Q\nEMC");
|
|
}
|
|
|
|
class TfFinder: public QPDFObjectHandle::TokenFilter
|
|
{
|
|
public:
|
|
TfFinder();
|
|
virtual ~TfFinder()
|
|
{
|
|
}
|
|
virtual void handleToken(QPDFTokenizer::Token const&);
|
|
double getTf();
|
|
std::string getFontName();
|
|
|
|
private:
|
|
double tf;
|
|
std::string font_name;
|
|
double last_num;
|
|
std::string last_name;
|
|
};
|
|
|
|
TfFinder::TfFinder() :
|
|
tf(11.0),
|
|
last_num(0.0)
|
|
{
|
|
}
|
|
|
|
void
|
|
TfFinder::handleToken(QPDFTokenizer::Token const& token)
|
|
{
|
|
QPDFTokenizer::token_type_e ttype = token.getType();
|
|
std::string value = token.getValue();
|
|
switch (ttype)
|
|
{
|
|
case QPDFTokenizer::tt_integer:
|
|
case QPDFTokenizer::tt_real:
|
|
last_num = strtod(value.c_str(), 0);
|
|
break;
|
|
|
|
case QPDFTokenizer::tt_name:
|
|
last_name = value;
|
|
break;
|
|
|
|
case QPDFTokenizer::tt_word:
|
|
if ((value == "Tf") &&
|
|
(last_num > 1.0) &&
|
|
(last_num < 1000.0))
|
|
{
|
|
// These ranges are arbitrary but keep us from doing
|
|
// insane things or suffering from over/underflow
|
|
tf = last_num;
|
|
}
|
|
font_name = last_name;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
double
|
|
TfFinder::getTf()
|
|
{
|
|
return this->tf;
|
|
}
|
|
|
|
std::string
|
|
TfFinder::getFontName()
|
|
{
|
|
return this->font_name;
|
|
}
|
|
|
|
QPDFObjectHandle
|
|
QPDFFormFieldObjectHelper::getFontFromResource(
|
|
QPDFObjectHandle resources, std::string const& name)
|
|
{
|
|
QPDFObjectHandle result;
|
|
if (resources.isDictionary() &&
|
|
resources.getKey("/Font").isDictionary() &&
|
|
resources.getKey("/Font").hasKey(name))
|
|
{
|
|
result = resources.getKey("/Font").getKey(name);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
void
|
|
QPDFFormFieldObjectHelper::generateTextAppearance(
|
|
QPDFAnnotationObjectHelper& aoh)
|
|
{
|
|
QPDFObjectHandle AS = aoh.getAppearanceStream("/N");
|
|
if (AS.isNull())
|
|
{
|
|
QTC::TC("qpdf", "QPDFFormFieldObjectHelper create AS from scratch");
|
|
QPDFObjectHandle::Rectangle rect = aoh.getRect();
|
|
QPDFObjectHandle::Rectangle bbox(
|
|
0, 0, rect.urx - rect.llx, rect.ury - rect.lly);
|
|
QPDFObjectHandle dict = QPDFObjectHandle::parse(
|
|
"<< /Resources << /ProcSet [ /PDF /Text ] >>"
|
|
" /Type /XObject /Subtype /Form >>");
|
|
dict.replaceKey("/BBox", QPDFObjectHandle::newFromRectangle(bbox));
|
|
AS = QPDFObjectHandle::newStream(
|
|
this->oh.getOwningQPDF(), "/Tx BMC\nEMC\n");
|
|
AS.replaceDict(dict);
|
|
QPDFObjectHandle AP = aoh.getAppearanceDictionary();
|
|
if (AP.isNull())
|
|
{
|
|
QTC::TC("qpdf", "QPDFFormFieldObjectHelper create AP from scratch");
|
|
aoh.getObjectHandle().replaceKey(
|
|
"/AP", QPDFObjectHandle::newDictionary());
|
|
AP = aoh.getAppearanceDictionary();
|
|
}
|
|
AP.replaceKey("/N", AS);
|
|
}
|
|
if (! AS.isStream())
|
|
{
|
|
aoh.getObjectHandle().warnIfPossible(
|
|
"unable to get normal appearance stream for update");
|
|
return;
|
|
}
|
|
QPDFObjectHandle bbox_obj = AS.getDict().getKey("/BBox");
|
|
if (! bbox_obj.isRectangle())
|
|
{
|
|
aoh.getObjectHandle().warnIfPossible(
|
|
"unable to get appearance stream bounding box");
|
|
return;
|
|
}
|
|
QPDFObjectHandle::Rectangle bbox = bbox_obj.getArrayAsRectangle();
|
|
std::string DA = getDefaultAppearance();
|
|
std::string V = getValueAsString();
|
|
std::vector<std::string> opt;
|
|
if (isChoice() && ((getFlags() & ff_ch_combo) == 0))
|
|
{
|
|
opt = getChoices();
|
|
}
|
|
|
|
TfFinder tff;
|
|
Pl_QPDFTokenizer tok("tf", &tff);
|
|
tok.write(QUtil::unsigned_char_pointer(DA.c_str()), DA.length());
|
|
tok.finish();
|
|
double tf = tff.getTf();
|
|
|
|
std::string (*encoder)(std::string const&, char) = &QUtil::utf8_to_ascii;
|
|
std::string font_name = tff.getFontName();
|
|
if (! font_name.empty())
|
|
{
|
|
// See if the font is encoded with something we know about.
|
|
QPDFObjectHandle resources = AS.getDict().getKey("/Resources");
|
|
QPDFObjectHandle font = getFontFromResource(resources, font_name);
|
|
if (! font.isInitialized())
|
|
{
|
|
QPDFObjectHandle dr = getInheritableFieldValue("/DR");
|
|
font = getFontFromResource(dr, font_name);
|
|
}
|
|
if (font.isDictionary() &&
|
|
font.getKey("/Encoding").isName())
|
|
{
|
|
std::string encoding = font.getKey("/Encoding").getName();
|
|
if (encoding == "/WinAnsiEncoding")
|
|
{
|
|
QTC::TC("qpdf", "QPDFFormFieldObjectHelper WinAnsi");
|
|
encoder = &QUtil::utf8_to_win_ansi;
|
|
}
|
|
else if (encoding == "/MacRomanEncoding")
|
|
{
|
|
encoder = &QUtil::utf8_to_mac_roman;
|
|
}
|
|
}
|
|
}
|
|
|
|
V = (*encoder)(V, '?');
|
|
for (size_t i = 0; i < opt.size(); ++i)
|
|
{
|
|
opt.at(i) = (*encoder)(opt.at(i), '?');
|
|
}
|
|
|
|
AS.addTokenFilter(new ValueSetter(DA, V, opt, tf, bbox));
|
|
}
|