[View] Fix page range updating.

Examples: There is only 1 page in the document There are 5 pages, then exclude 1, then 3 There are 5 pages, then exclude 5, then 3 Co-Authored-By: Kira Sagalakova <k.sagalakova@omp.ru>

[View] Fix page range updating.
Examples: There is only 1 page in the document There are 5 pages, then exclude 1, then 3 There are 5 pages, then exclude 5, then 3 Co-Authored-By: Kira Sagalakova <k.sagalakova@omp.ru>
d11f83ff · OMP Education · k.sagalakova · bf1f9e7e · d11f83ff · d11f83ff
--- a/plugin/src/documentmapper.cpp
+++ b/plugin/src/documentmapper.cpp
@@ -46,6 +46,34 @@ void removeFromMiddle(int index,
        specialRangeIndexes.erase(it);
    } else {
        auto prevRange = *it;
+        if (index - it->first == 1) {
+            specialIndexes.insert(it->first);
+            specialRangeIndexes[index + 1] = prevRange.second;
+            auto removingIt = std::find_if(specialRangeIndexes.begin(),
+                                           specialRangeIndexes.end(),
+                                           [prevRange](const std::pair<int, int> &t) -> bool {
+                                               return prevRange.first == t.first
+                                                      && prevRange.second == t.second;
+                                           });
+            if (removingIt != specialRangeIndexes.end())
+                specialRangeIndexes.erase(removingIt);
+            return;
+        }
+
+        if (it->second - index == 1) {
+            specialIndexes.insert(it->second);
+            specialRangeIndexes[prevRange.first] = index - 1;
+            auto removingIt = std::find_if(specialRangeIndexes.begin(),
+                                           specialRangeIndexes.end(),
+                                           [prevRange](const std::pair<int, int> &t) -> bool {
+                                               return prevRange.first == t.first
+                                                      && prevRange.second == t.second;
+                                           });
+            if (removingIt != specialRangeIndexes.end())
+                specialRangeIndexes.erase(removingIt);
+            return;
+        }
+
        specialRangeIndexes[prevRange.first] = index - 1;
        specialRangeIndexes[index + 1] = prevRange.second;
    }

--- a/plugin/src/pdfview.cpp
+++ b/plugin/src/pdfview.cpp
@@ -610,7 +610,12 @@ void PdfView::setDocumentProvider(BaseDocument *documentProvider)
            m_count = m_documentProvider->count();
            if (m_pageNumberComponent) {
                std::set<int> pageIndexes;
-                std::map<int, int> indexIntervals = {std::pair(0, m_count - 1)};
+                std::map<int, int> indexIntervals;
+                if (m_count > 1)
+                    indexIntervals = {std::pair(0, m_count - 1)};
+                else
+                    pageIndexes = {m_count - 1};
+
                if (m_pageRange.isEmpty())
                    m_mapper->setSpecialPageIndexes(indexIntervals, pageIndexes);
            }