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https://github.com/qpdf/qpdf.git
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1013 lines
27 KiB
C++
1013 lines
27 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 <qpdf/QIntC.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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QPDFFormFieldObjectHelper
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QPDFFormFieldObjectHelper::getTopLevelField(bool* is_different)
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{
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auto top_field = this->oh;
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std::set<QPDFObjGen> seen;
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while (top_field.isDictionary() &&
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(! top_field.getKey("/Parent").isNull()))
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{
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top_field = top_field.getKey("/Parent");
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if (is_different)
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{
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*is_different = true;
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}
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auto og = top_field.getObjGen();
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if (seen.count(og))
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{
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break;
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}
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seen.insert(og);
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}
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return QPDFFormFieldObjectHelper(top_field);
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}
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QPDFObjectHandle
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QPDFFormFieldObjectHelper::getFieldFromAcroForm(std::string const& name)
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{
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QPDFObjectHandle result = QPDFObjectHandle::newNull();
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// Fields are supposed to be indirect, so this should work.
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QPDF* q = this->oh.getOwningQPDF();
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if (! q)
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{
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return result;
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}
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auto acroform = q->getRoot().getKey("/AcroForm");
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if (! acroform.isDictionary())
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{
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return result;
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}
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return acroform.getKey(name);
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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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if (! node.isDictionary())
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{
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return QPDFObjectHandle::newNull();
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}
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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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QPDFObjectHandle
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QPDFFormFieldObjectHelper::getDefaultResources()
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{
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return getFieldFromAcroForm("/DR");
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}
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std::string
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QPDFFormFieldObjectHelper::getDefaultAppearance()
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{
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auto value = getInheritableFieldValue("/DA");
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bool looked_in_acroform = false;
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if (! value.isString())
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{
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value = getFieldFromAcroForm("/DA");
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looked_in_acroform = true;
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}
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std::string result;
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if (value.isString())
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{
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QTC::TC("qpdf", "QPDFFormFieldObjectHelper DA present",
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looked_in_acroform ? 0 : 1);
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result = value.getUTF8Value();
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}
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return result;
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}
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int
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QPDFFormFieldObjectHelper::getQuadding()
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{
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QPDFObjectHandle fv = getInheritableFieldValue("/Q");
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bool looked_in_acroform = false;
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if (! fv.isInteger())
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{
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fv = getFieldFromAcroForm("/Q");
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looked_in_acroform = true;
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}
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int result = 0;
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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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looked_in_acroform ? 0 : 1);
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result = QIntC::to_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.getIntValueAsInt() : 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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int n = opt.getArrayNItems();
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for (int 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
|
|
// for. Button fields don't really need them -- see code in
|
|
// QPDFAcroFormDocumentHelper::generateAppearancesIfNeeded.
|
|
if ((ft == "/Tx") || (ft == "/Ch"))
|
|
{
|
|
generateTextAppearance(aoh);
|
|
}
|
|
}
|
|
|
|
class ValueSetter: public QPDFObjectHandle::TokenFilter
|
|
{
|
|
public:
|
|
ValueSetter(std::string const& DA, std::string const& V,
|
|
std::vector<std::string> const& opt, double tf,
|
|
QPDFObjectHandle::Rectangle const& bbox);
|
|
virtual ~ValueSetter()
|
|
{
|
|
}
|
|
virtual void handleToken(QPDFTokenizer::Token const&);
|
|
virtual void handleEOF();
|
|
void writeAppearance();
|
|
|
|
private:
|
|
std::string DA;
|
|
std::string V;
|
|
std::vector<std::string> opt;
|
|
double tf;
|
|
QPDFObjectHandle::Rectangle bbox;
|
|
enum { st_top, st_bmc, st_emc, st_end } state;
|
|
bool replaced;
|
|
};
|
|
|
|
ValueSetter::ValueSetter(std::string const& DA, std::string const& V,
|
|
std::vector<std::string> const& opt, double tf,
|
|
QPDFObjectHandle::Rectangle const& bbox) :
|
|
DA(DA),
|
|
V(V),
|
|
opt(opt),
|
|
tf(tf),
|
|
bbox(bbox),
|
|
state(st_top),
|
|
replaced(false)
|
|
{
|
|
}
|
|
|
|
void
|
|
ValueSetter::handleToken(QPDFTokenizer::Token const& token)
|
|
{
|
|
QPDFTokenizer::token_type_e ttype = token.getType();
|
|
std::string value = token.getValue();
|
|
bool do_replace = false;
|
|
switch (state)
|
|
{
|
|
case st_top:
|
|
writeToken(token);
|
|
if ((ttype == QPDFTokenizer::tt_word) && (value == "BMC"))
|
|
{
|
|
state = st_bmc;
|
|
}
|
|
break;
|
|
|
|
case st_bmc:
|
|
if ((ttype == QPDFTokenizer::tt_space) ||
|
|
(ttype == QPDFTokenizer::tt_comment))
|
|
{
|
|
writeToken(token);
|
|
}
|
|
else
|
|
{
|
|
state = st_emc;
|
|
}
|
|
// fall through to emc
|
|
|
|
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 = QIntC::to_int(found_idx) - 1;
|
|
int wanted_last = QIntC::to_int(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 >= QIntC::to_int(nopt))
|
|
{
|
|
QTC::TC("qpdf", "QPDFFormFieldObjectHelper list last too high");
|
|
if (wanted_first > 0)
|
|
{
|
|
--wanted_first;
|
|
}
|
|
--wanted_last;
|
|
}
|
|
highlight = true;
|
|
highlight_idx = found_idx - QIntC::to_size(wanted_first);
|
|
for (size_t i = QIntC::to_size(wanted_first);
|
|
i <= QIntC::to_size(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 -
|
|
(static_cast<double>(nlines) * tfh)) / 2.0);
|
|
if (highlight)
|
|
{
|
|
write("q\n0.85 0.85 0.85 rg\n" +
|
|
QUtil::double_to_string(bbox.llx) + " " +
|
|
QUtil::double_to_string(
|
|
bbox.lly + dy -
|
|
(tfh * (static_cast<double>(highlight_idx + 1)))) + " " +
|
|
QUtil::double_to_string(bbox.urx - bbox.llx) + " " +
|
|
QUtil::double_to_string(tfh) +
|
|
" re f\nQ\n");
|
|
}
|
|
dy -= tf;
|
|
write("q\nBT\n" + DA + "\n");
|
|
for (size_t i = 0; i < nlines; ++i)
|
|
{
|
|
// We could adjust Tm to translate to the beginning the first
|
|
// line, set TL to tfh, and use T* for each subsequent line,
|
|
// but doing this would require extracting any Tm from DA,
|
|
// which doesn't seem really worth the effort.
|
|
if (i == 0)
|
|
{
|
|
write(QUtil::double_to_string(bbox.llx + static_cast<double>(dx)) +
|
|
" " +
|
|
QUtil::double_to_string(bbox.lly + static_cast<double>(dy)) +
|
|
" Td\n");
|
|
}
|
|
else
|
|
{
|
|
write("0 " + QUtil::double_to_string(-tfh) + " Td\n");
|
|
}
|
|
write(QPDFObjectHandle::newString(lines.at(i)).unparse() + " Tj\n");
|
|
}
|
|
write("ET\nQ\nEMC");
|
|
}
|
|
|
|
class TfFinder: public QPDFObjectHandle::TokenFilter
|
|
{
|
|
public:
|
|
TfFinder();
|
|
virtual ~TfFinder()
|
|
{
|
|
}
|
|
virtual void handleToken(QPDFTokenizer::Token const&);
|
|
double getTf();
|
|
std::string getFontName();
|
|
std::string getDA();
|
|
|
|
private:
|
|
double tf;
|
|
size_t tf_idx;
|
|
std::string font_name;
|
|
double last_num;
|
|
size_t last_num_idx;
|
|
std::string last_name;
|
|
std::vector<std::string> DA;
|
|
};
|
|
|
|
TfFinder::TfFinder() :
|
|
tf(11.0),
|
|
tf_idx(0),
|
|
last_num(0.0),
|
|
last_num_idx(0)
|
|
{
|
|
}
|
|
|
|
void
|
|
TfFinder::handleToken(QPDFTokenizer::Token const& token)
|
|
{
|
|
QPDFTokenizer::token_type_e ttype = token.getType();
|
|
std::string value = token.getValue();
|
|
DA.push_back(token.getRawValue());
|
|
switch (ttype)
|
|
{
|
|
case QPDFTokenizer::tt_integer:
|
|
case QPDFTokenizer::tt_real:
|
|
last_num = strtod(value.c_str(), 0);
|
|
last_num_idx = DA.size() - 1;
|
|
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;
|
|
}
|
|
tf_idx = last_num_idx;
|
|
font_name = last_name;
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
double
|
|
TfFinder::getTf()
|
|
{
|
|
return this->tf;
|
|
}
|
|
|
|
std::string
|
|
TfFinder::getDA()
|
|
{
|
|
std::string result;
|
|
size_t n = this->DA.size();
|
|
for (size_t i = 0; i < n; ++i)
|
|
{
|
|
std::string cur = this->DA.at(i);
|
|
if (i == tf_idx)
|
|
{
|
|
double delta = strtod(cur.c_str(), 0) - this->tf;
|
|
if ((delta > 0.001) || (delta < -0.001))
|
|
{
|
|
// tf doesn't match the font size passed to Tf, so
|
|
// substitute.
|
|
QTC::TC("qpdf", "QPDFFormFieldObjectHelper fallback Tf");
|
|
cur = QUtil::double_to_string(tf);
|
|
}
|
|
}
|
|
result += cur;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
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();
|
|
DA = tff.getDA();
|
|
|
|
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);
|
|
bool found_font_in_dr = false;
|
|
if (! font.isInitialized())
|
|
{
|
|
QPDFObjectHandle dr = getDefaultResources();
|
|
font = getFontFromResource(dr, font_name);
|
|
found_font_in_dr = (font.isInitialized() && font.isDictionary());
|
|
}
|
|
if (found_font_in_dr && resources.isDictionary())
|
|
{
|
|
QTC::TC("qpdf", "QPDFFormFieldObjectHelper get font from /DR");
|
|
if (resources.isIndirect())
|
|
{
|
|
resources = resources.getOwningQPDF()->makeIndirectObject(
|
|
resources.shallowCopy());
|
|
AS.getDict().replaceKey("/Resources", resources);
|
|
}
|
|
// Use mergeResources to force /Font to be local
|
|
resources.mergeResources(
|
|
QPDFObjectHandle::parse("<< /Font << >> >>"));
|
|
resources.getKey("/Font").replaceKey(font_name, font);
|
|
}
|
|
|
|
if (font.isInitialized() &&
|
|
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));
|
|
}
|