diff options
Diffstat (limited to 'libqpdf/QPDF_pages.cc')
| -rw-r--r-- | libqpdf/QPDF_pages.cc | 178 |
1 files changed, 80 insertions, 98 deletions
diff --git a/libqpdf/QPDF_pages.cc b/libqpdf/QPDF_pages.cc index 032809e2..065be7e7 100644 --- a/libqpdf/QPDF_pages.cc +++ b/libqpdf/QPDF_pages.cc @@ -2,9 +2,9 @@ #include <assert.h> +#include <qpdf/QPDFExc.hh> #include <qpdf/QTC.hh> #include <qpdf/QUtil.hh> -#include <qpdf/QPDFExc.hh> // In support of page manipulation APIs, these methods internally // maintain state about pages in a pair of data structures: all_pages, @@ -53,25 +53,21 @@ QPDF::getAllPages() { // Note that pushInheritedAttributesToPage may also be used to // initialize this->m->all_pages. - if (this->m->all_pages.empty()) - { + if (this->m->all_pages.empty()) { std::set<QPDFObjGen> visited; std::set<QPDFObjGen> seen; QPDFObjectHandle pages = getRoot().getKey("/Pages"); bool warned = false; bool changed_pages = false; - while (pages.isDictionary() && pages.hasKey("/Parent")) - { - if (seen.count(pages.getObjGen())) - { + while (pages.isDictionary() && pages.hasKey("/Parent")) { + if (seen.count(pages.getObjGen())) { // loop -- will be detected again and reported later break; } // Files have been found in the wild where /Pages in the // catalog points to the first page. Try to work around // this and similar cases with this heuristic. - if (! warned) - { + if (!warned) { getRoot().warnIfPossible( "document page tree root (root -> /Pages) doesn't point" " to the root of the page tree; attempting to correct"); @@ -81,8 +77,7 @@ QPDF::getAllPages() changed_pages = true; pages = pages.getKey("/Parent"); } - if (changed_pages) - { + if (changed_pages) { getRoot().replaceKey("/Pages", pages); } seen.clear(); @@ -92,37 +87,34 @@ QPDF::getAllPages() } void -QPDF::getAllPagesInternal(QPDFObjectHandle cur_node, - std::vector<QPDFObjectHandle>& result, - std::set<QPDFObjGen>& visited, - std::set<QPDFObjGen>& seen) +QPDF::getAllPagesInternal( + QPDFObjectHandle cur_node, + std::vector<QPDFObjectHandle>& result, + std::set<QPDFObjGen>& visited, + std::set<QPDFObjGen>& seen) { QPDFObjGen this_og = cur_node.getObjGen(); - if (visited.count(this_og) > 0) - { + if (visited.count(this_og) > 0) { throw QPDFExc( - qpdf_e_pages, this->m->file->getName(), - this->m->last_object_description, 0, + qpdf_e_pages, + this->m->file->getName(), + this->m->last_object_description, + 0, "Loop detected in /Pages structure (getAllPages)"); } visited.insert(this_og); std::string wanted_type; - if (cur_node.hasKey("/Kids")) - { + if (cur_node.hasKey("/Kids")) { wanted_type = "/Pages"; QPDFObjectHandle kids = cur_node.getKey("/Kids"); int n = kids.getArrayNItems(); - for (int i = 0; i < n; ++i) - { + for (int i = 0; i < n; ++i) { QPDFObjectHandle kid = kids.getArrayItem(i); - if (! kid.isIndirect()) - { + if (!kid.isIndirect()) { QTC::TC("qpdf", "QPDF handle direct page object"); kid = makeIndirectObject(kid); kids.setArrayItem(i, kid); - } - else if (seen.count(kid.getObjGen())) - { + } else if (seen.count(kid.getObjGen())) { // Make a copy of the page. This does the same as // shallowCopyPage in QPDFPageObjectHelper. QTC::TC("qpdf", "QPDF resolve duplicated page object"); @@ -131,21 +123,19 @@ QPDF::getAllPagesInternal(QPDFObjectHandle cur_node, } getAllPagesInternal(kid, result, visited, seen); } - } - else - { + } else { wanted_type = "/Page"; seen.insert(this_og); result.push_back(cur_node); } - if (! cur_node.isDictionaryOfType(wanted_type)) - { - warn(QPDFExc(qpdf_e_damaged_pdf, this->m->file->getName(), - "page tree node", - this->m->file->getLastOffset(), - "/Type key should be " + wanted_type + - " but is not; overriding")); + if (!cur_node.isDictionaryOfType(wanted_type)) { + warn(QPDFExc( + qpdf_e_damaged_pdf, + this->m->file->getName(), + "page tree node", + this->m->file->getLastOffset(), + "/Type key should be " + wanted_type + " but is not; overriding")); cur_node.replaceKey("/Type", QPDFObjectHandle::newName(wanted_type)); } visited.erase(this_og); @@ -171,8 +161,7 @@ QPDF::flattenPagesTree() // If not already done, flatten the /Pages structure and // initialize pageobj_to_pages_pos. - if (! this->m->pageobj_to_pages_pos.empty()) - { + if (!this->m->pageobj_to_pages_pos.empty()) { return; } @@ -183,8 +172,7 @@ QPDF::flattenPagesTree() QPDFObjectHandle pages = getRoot().getKey("/Pages"); size_t const len = this->m->all_pages.size(); - for (size_t pos = 0; pos < len; ++pos) - { + for (size_t pos = 0; pos < len; ++pos) { // Populate pageobj_to_pages_pos and fix parent pointer. There // should be no duplicates at this point because // pushInheritedAttributesToPage calls getAllPages which @@ -195,35 +183,34 @@ QPDF::flattenPagesTree() pages.replaceKey("/Kids", QPDFObjectHandle::newArray(this->m->all_pages)); // /Count has not changed - if (pages.getKey("/Count").getUIntValue() != len) - { + if (pages.getKey("/Count").getUIntValue() != len) { throw std::runtime_error("/Count is wrong after flattening pages tree"); } } void -QPDF::insertPageobjToPage(QPDFObjectHandle const& obj, int pos, - bool check_duplicate) +QPDF::insertPageobjToPage( + QPDFObjectHandle const& obj, int pos, bool check_duplicate) { QPDFObjGen og(obj.getObjGen()); - if (check_duplicate) - { - if (! this->m->pageobj_to_pages_pos.insert( - std::make_pair(og, pos)).second) - { + if (check_duplicate) { + if (!this->m->pageobj_to_pages_pos.insert(std::make_pair(og, pos)) + .second) { // The library never calls insertPageobjToPage in a way // that causes this to happen. - setLastObjectDescription("page " + QUtil::int_to_string(pos) + - " (numbered from zero)", - og.getObj(), og.getGen()); - throw QPDFExc(qpdf_e_pages, this->m->file->getName(), - this->m->last_object_description, 0, - "duplicate page reference found;" - " this would cause loss of data"); + setLastObjectDescription( + "page " + QUtil::int_to_string(pos) + " (numbered from zero)", + og.getObj(), + og.getGen()); + throw QPDFExc( + qpdf_e_pages, + this->m->file->getName(), + this->m->last_object_description, + 0, + "duplicate page reference found;" + " this would cause loss of data"); } - } - else - { + } else { this->m->pageobj_to_pages_pos[og] = pos; } } @@ -236,45 +223,41 @@ QPDF::insertPage(QPDFObjectHandle newpage, int pos) flattenPagesTree(); - if (! newpage.isIndirect()) - { + if (!newpage.isIndirect()) { QTC::TC("qpdf", "QPDF insert non-indirect page"); newpage = makeIndirectObject(newpage); - } - else if (newpage.getOwningQPDF() != this) - { + } else if (newpage.getOwningQPDF() != this) { QTC::TC("qpdf", "QPDF insert foreign page"); newpage.getOwningQPDF()->pushInheritedAttributesToPage(); newpage = copyForeignObject(newpage); - } - else - { + } else { QTC::TC("qpdf", "QPDF insert indirect page"); } - QTC::TC("qpdf", "QPDF insert page", - (pos == 0) ? 0 : // insert at beginning - (pos == QIntC::to_int(this->m->all_pages.size())) ? 1 : // at end - 2); // insert in middle + QTC::TC( + "qpdf", + "QPDF insert page", + (pos == 0) ? 0 : // insert at beginning + (pos == QIntC::to_int(this->m->all_pages.size())) ? 1 + : // at end + 2); // insert in middle auto og = newpage.getObjGen(); - if (this->m->pageobj_to_pages_pos.count(og)) - { + if (this->m->pageobj_to_pages_pos.count(og)) { QTC::TC("qpdf", "QPDF resolve duplicated page in insert"); newpage = makeIndirectObject(QPDFObjectHandle(newpage).shallowCopy()); } QPDFObjectHandle pages = getRoot().getKey("/Pages"); QPDFObjectHandle kids = pages.getKey("/Kids"); - assert ((pos >= 0) && (QIntC::to_size(pos) <= this->m->all_pages.size())); + assert((pos >= 0) && (QIntC::to_size(pos) <= this->m->all_pages.size())); newpage.replaceKey("/Parent", pages); kids.insertItem(pos, newpage); int npages = kids.getArrayNItems(); pages.replaceKey("/Count", QPDFObjectHandle::newInteger(npages)); this->m->all_pages.insert(this->m->all_pages.begin() + pos, newpage); - for (int i = pos + 1; i < npages; ++i) - { + for (int i = pos + 1; i < npages; ++i) { insertPageobjToPage(this->m->all_pages.at(toS(i)), i, false); } insertPageobjToPage(newpage, pos, true); @@ -284,10 +267,13 @@ void QPDF::removePage(QPDFObjectHandle page) { int pos = findPage(page); // also ensures flat /Pages - QTC::TC("qpdf", "QPDF remove page", - (pos == 0) ? 0 : // remove at beginning - (pos == QIntC::to_int(this->m->all_pages.size() - 1)) ? 1 : // end - 2); // remove in middle + QTC::TC( + "qpdf", + "QPDF remove page", + (pos == 0) ? 0 : // remove at beginning + (pos == QIntC::to_int(this->m->all_pages.size() - 1)) ? 1 + : // end + 2); // remove in middle QPDFObjectHandle pages = getRoot().getKey("/Pages"); QPDFObjectHandle kids = pages.getKey("/Kids"); @@ -297,19 +283,16 @@ QPDF::removePage(QPDFObjectHandle page) pages.replaceKey("/Count", QPDFObjectHandle::newInteger(npages)); this->m->all_pages.erase(this->m->all_pages.begin() + pos); this->m->pageobj_to_pages_pos.erase(page.getObjGen()); - for (int i = pos; i < npages; ++i) - { + for (int i = pos; i < npages; ++i) { insertPageobjToPage(this->m->all_pages.at(toS(i)), i, false); } } void -QPDF::addPageAt(QPDFObjectHandle newpage, bool before, - QPDFObjectHandle refpage) +QPDF::addPageAt(QPDFObjectHandle newpage, bool before, QPDFObjectHandle refpage) { int refpos = findPage(refpage); - if (! before) - { + if (!before) { ++refpos; } insertPage(newpage, refpos); @@ -318,12 +301,9 @@ QPDF::addPageAt(QPDFObjectHandle newpage, bool before, void QPDF::addPage(QPDFObjectHandle newpage, bool first) { - if (first) - { + if (first) { insertPage(newpage, 0); - } - else - { + } else { insertPage( newpage, getRoot().getKey("/Pages").getKey("/Count").getIntValueAsInt()); @@ -342,13 +322,15 @@ QPDF::findPage(QPDFObjGen const& og) flattenPagesTree(); std::map<QPDFObjGen, int>::iterator it = this->m->pageobj_to_pages_pos.find(og); - if (it == this->m->pageobj_to_pages_pos.end()) - { + if (it == this->m->pageobj_to_pages_pos.end()) { QTC::TC("qpdf", "QPDF_pages findPage not found"); setLastObjectDescription("page object", og.getObj(), og.getGen()); - throw QPDFExc(qpdf_e_pages, this->m->file->getName(), - this->m->last_object_description, 0, - "page object not referenced in /Pages tree"); + throw QPDFExc( + qpdf_e_pages, + this->m->file->getName(), + this->m->last_object_description, + 0, + "page object not referenced in /Pages tree"); } return (*it).second; } |