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DocDiff application: detect moved pages

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Jakub Melka
2021-09-19 19:46:02 +02:00
parent 3e327f8201
commit c00939f536
6 changed files with 186 additions and 6 deletions
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18
Pdf4QtLib/sources/pdfalgorithmlcs.h
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@ -30,7 +30,7 @@ public:
enum SequenceItemFlag
{
None = 0x0000,
MovedLeft = 0x0001, ///< Item has been moved from this position (is present in sequence no. 1)
MovedLeft = 0x0001, ///< Item has been moved from this position (is present in a sequence no. 1)
MovedRight = 0x0002, ///< Item has been moved to this position (is present in a sequence no. 2)
Moved = 0x0004, ///< Index of item has been changed
Added = 0x0008, ///< Item has been added to a sequence no. 2
@ -56,6 +56,7 @@ public:
bool isAdded() const { return flags.testFlag(Added); }
bool isRemoved() const { return flags.testFlag(Removed); }
bool isReplaced() const { return flags.testFlag(Replaced); }
bool isModified() const { return isAdded() || isRemoved() || isReplaced(); }
void markMovedLeft() { flags.setFlag(MovedLeft); }
void markMovedRight() { flags.setFlag(MovedRight); }
@ -64,7 +65,11 @@ public:
void markRemoved() { flags.setFlag(Removed); }
void markReplaced() { flags.setFlag(Replaced); }
};
using Sequence = std::vector<SequenceItem>;
using Sequence = typename std::vector<SequenceItem>;
using SequenceIterator = typename Sequence::iterator;
using SequenceItemRange = typename std::pair<SequenceIterator, SequenceIterator>;
using SequenceItemRanges = typename std::vector<SequenceItemRange>;
/// Marks a sequence with set of flags representing added/removed/replaced/moved
/// items. Moved items sequences must be sorted.
@ -74,6 +79,15 @@ public:
static void markSequence(Sequence& sequence,
const std::vector<size_t>& movedItemsLeft,
const std::vector<size_t>& movedItemsRight);
/// Returns item ranges, which should be checked - for example,
/// for text modification.
/// \param sequence Sequence
static SequenceItemRanges getModifiedRanges(Sequence& sequence);
/// Collect flags from given item range
/// \param range Range
static SequenceItemFlags collectFlags(const SequenceItemRange& range);
};
/// Algorithm for computing longest common subsequence, on two sequences