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Fix code formatting of QPDF::pushInheritedAttributesToPageInternal
This commit is contained in:
m-holger
parent
0356bcecc5
commit
903a86643a
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@ -168,111 +168,109 @@ QPDF::pushInheritedAttributesToPageInternal(
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bool allow_changes,
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bool warn_skipped_keys)
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{
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// Make a list of inheritable keys. Only the keys /MediaBox,
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// /CropBox, /Resources, and /Rotate are inheritable
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// attributes. Push this object onto the stack of pages nodes
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// that have values for this attribute.
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// Make a list of inheritable keys. Only the keys /MediaBox,
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// /CropBox, /Resources, and /Rotate are inheritable
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// attributes. Push this object onto the stack of pages nodes
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// that have values for this attribute.
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std::set<std::string> inheritable_keys;
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for (auto const& key: cur_pages.getKeys()) {
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if ((key == "/MediaBox") || (key == "/CropBox") ||
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(key == "/Resources") || (key == "/Rotate")) {
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if (!allow_changes) {
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throw QPDFExc(
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qpdf_e_internal,
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this->m->file->getName(),
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this->m->last_object_description,
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this->m->file->getLastOffset(),
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"optimize detected an "
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"inheritable attribute when called "
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"in no-change mode");
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}
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std::set<std::string> inheritable_keys;
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for (auto const& key: cur_pages.getKeys()) {
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if ((key == "/MediaBox") || (key == "/CropBox") ||
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(key == "/Resources") || (key == "/Rotate")) {
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if (!allow_changes) {
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throw QPDFExc(
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qpdf_e_internal,
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this->m->file->getName(),
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this->m->last_object_description,
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this->m->file->getLastOffset(),
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"optimize detected an "
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"inheritable attribute when called "
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"in no-change mode");
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}
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// This is an inheritable resource
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inheritable_keys.insert(key);
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QPDFObjectHandle oh = cur_pages.getKey(key);
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QTC::TC(
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"qpdf",
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"QPDF opt direct pages resource",
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oh.isIndirect() ? 0 : 1);
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if (!oh.isIndirect()) {
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if (!oh.isScalar()) {
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// Replace shared direct object non-scalar
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// resources with indirect objects to avoid
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// copying large structures around.
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cur_pages.replaceKey(key, makeIndirectObject(oh));
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oh = cur_pages.getKey(key);
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} else {
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// It's okay to copy scalars.
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QTC::TC("qpdf", "QPDF opt inherited scalar");
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}
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}
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key_ancestors[key].push_back(oh);
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if (key_ancestors[key].size() > 1) {
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QTC::TC("qpdf", "QPDF opt key ancestors depth > 1");
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}
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// Remove this resource from this node. It will be
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// reattached at the page level.
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cur_pages.removeKey(key);
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} else if (!((key == "/Type") || (key == "/Parent") ||
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(key == "/Kids") || (key == "/Count"))) {
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// Warn when flattening, but not if the key is at the top
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// level (i.e. "/Parent" not set), as we don't change these;
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// but flattening removes intermediate /Pages nodes.
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if ((warn_skipped_keys) && (cur_pages.hasKey("/Parent"))) {
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QTC::TC("qpdf", "QPDF unknown key not inherited");
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setLastObjectDescription(
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"Pages object", cur_pages.getObjGen());
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warn(
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qpdf_e_pages,
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this->m->last_object_description,
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0,
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("Unknown key " + key +
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" in /Pages object"
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" is being discarded as a result of"
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" flattening the /Pages tree"));
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// This is an inheritable resource
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inheritable_keys.insert(key);
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QPDFObjectHandle oh = cur_pages.getKey(key);
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QTC::TC(
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"qpdf",
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"QPDF opt direct pages resource",
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oh.isIndirect() ? 0 : 1);
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if (!oh.isIndirect()) {
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if (!oh.isScalar()) {
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// Replace shared direct object non-scalar
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// resources with indirect objects to avoid
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// copying large structures around.
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cur_pages.replaceKey(key, makeIndirectObject(oh));
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oh = cur_pages.getKey(key);
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} else {
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// It's okay to copy scalars.
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QTC::TC("qpdf", "QPDF opt inherited scalar");
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}
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}
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key_ancestors[key].push_back(oh);
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if (key_ancestors[key].size() > 1) {
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QTC::TC("qpdf", "QPDF opt key ancestors depth > 1");
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}
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// Remove this resource from this node. It will be
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// reattached at the page level.
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cur_pages.removeKey(key);
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} else if (!((key == "/Type") || (key == "/Parent") ||
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(key == "/Kids") || (key == "/Count"))) {
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// Warn when flattening, but not if the key is at the top
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// level (i.e. "/Parent" not set), as we don't change these;
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// but flattening removes intermediate /Pages nodes.
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if ((warn_skipped_keys) && (cur_pages.hasKey("/Parent"))) {
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QTC::TC("qpdf", "QPDF unknown key not inherited");
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setLastObjectDescription("Pages object", cur_pages.getObjGen());
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warn(
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qpdf_e_pages,
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this->m->last_object_description,
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0,
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("Unknown key " + key +
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" in /Pages object"
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" is being discarded as a result of"
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" flattening the /Pages tree"));
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}
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}
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}
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// Process descendant nodes.
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for (auto& kid: cur_pages.getKey("/Kids").aitems()) {
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if (kid.isDictionaryOfType("/Pages")) {
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pushInheritedAttributesToPageInternal(
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kid, key_ancestors, allow_changes, warn_skipped_keys);
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} else {
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// Add all available inheritable attributes not present in
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// this object to this object.
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for (auto const& iter: key_ancestors) {
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std::string const& key = iter.first;
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if (!kid.hasKey(key)) {
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QTC::TC("qpdf", "QPDF opt resource inherited");
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kid.replaceKey(key, iter.second.back());
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} else {
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QTC::TC(
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"qpdf", "QPDF opt page resource hides ancestor");
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}
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}
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}
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}
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// For each inheritable key, pop the stack. If the stack
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// becomes empty, remove it from the map. That way, the
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// invariant that the list of keys in key_ancestors is exactly
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// those keys for which inheritable attributes are available.
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if (!inheritable_keys.empty()) {
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QTC::TC("qpdf", "QPDF opt inheritable keys");
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for (auto const& key: inheritable_keys) {
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key_ancestors[key].pop_back();
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if (key_ancestors[key].empty()) {
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QTC::TC("qpdf", "QPDF opt erase empty key ancestor");
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key_ancestors.erase(key);
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}
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}
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// Process descendant nodes.
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for (auto& kid: cur_pages.getKey("/Kids").aitems()) {
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if (kid.isDictionaryOfType("/Pages")) {
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pushInheritedAttributesToPageInternal(
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kid, key_ancestors, allow_changes, warn_skipped_keys);
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} else {
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QTC::TC("qpdf", "QPDF opt no inheritable keys");
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// Add all available inheritable attributes not present in
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// this object to this object.
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for (auto const& iter: key_ancestors) {
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std::string const& key = iter.first;
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if (!kid.hasKey(key)) {
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QTC::TC("qpdf", "QPDF opt resource inherited");
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kid.replaceKey(key, iter.second.back());
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} else {
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QTC::TC("qpdf", "QPDF opt page resource hides ancestor");
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}
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}
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}
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}
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// For each inheritable key, pop the stack. If the stack
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// becomes empty, remove it from the map. That way, the
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// invariant that the list of keys in key_ancestors is exactly
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// those keys for which inheritable attributes are available.
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if (!inheritable_keys.empty()) {
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QTC::TC("qpdf", "QPDF opt inheritable keys");
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for (auto const& key: inheritable_keys) {
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key_ancestors[key].pop_back();
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if (key_ancestors[key].empty()) {
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QTC::TC("qpdf", "QPDF opt erase empty key ancestor");
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key_ancestors.erase(key);
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}
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}
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} else {
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QTC::TC("qpdf", "QPDF opt no inheritable keys");
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}
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}
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void
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