improved hyperlink implementation

- hyperlinks to cells and ranges are complete
- hyperlink::display is now set as well as the cell value (in excel these can be different)
-- if a cell is empty, display is equal to value text
-- if a cell has a value, display can be just about anything
- This version copies excel in that display is completely ignored once value is set
- All hyperlink tests are now part of the cell test suite (not the worksheet test suite which the majority were previously located)

include/xlnt/cell/cell.hpp

@@ -262,26 +262,21 @@ public:
     /// </summary>
     class hyperlink hyperlink() const;
 
-    /// <summary>
-    /// Adds a hyperlink to this cell pointing to the URL of the given value.
-    /// </summary>
-    void hyperlink(const std::string &url);
-
     /// <summary>
     /// Adds a hyperlink to this cell pointing to the URI of the given value and sets
     /// the text value of the cell to the given parameter.
     /// </summary>
-    void hyperlink(const std::string &url, const std::string &display);
+    void hyperlink(const std::string &url, const std::string &display = "");
 
     /// <summary>
     /// Adds an internal hyperlink to this cell pointing to the given cell.
     /// </summary>
-    void hyperlink(xlnt::cell target);
+    void hyperlink(xlnt::cell target, const std::string& display = "");
 
     /// <summary>
     /// Adds an internal hyperlink to this cell pointing to the given range.
     /// </summary>
-    void hyperlink(xlnt::range target);
+    void hyperlink(xlnt::range target, const std::string& display = "");
 
     /// <summary>
     /// Returns true if this cell has a hyperlink set.

include/xlnt/cell/hyperlink.hpp

@@ -44,12 +44,22 @@ class XLNT_API hyperlink
 public:
     bool external() const;
     class relationship relationship() const;
+    // external target
     std::string url() const;
+    // internal target
     std::string target_range() const;
+
+    bool has_display() const;
     void display(const std::string &value);
-    std::string display() const;
+    const std::string& display() const;
+
+    bool has_tooltip() const;
     void tooltip(const std::string &value);
-    std::string tooltip() const;
+    const std::string& tooltip() const;
+
+    bool has_location() const;
+    void location(const std::string &value);
+    const std::string& location() const;
 
 private:
     friend class cell;

source/cell/cell.cpp

@@ -372,7 +372,7 @@ hyperlink cell::hyperlink() const
     return xlnt::hyperlink(&d_->hyperlink_.get());
 }
 
-void cell::hyperlink(const std::string &url)
+void cell::hyperlink(const std::string &url, const std::string &display)
 {
     if (url.empty() || std::find(url.begin(), url.end(), ':') == url.end())
     {
@@ -388,7 +388,8 @@ void cell::hyperlink(const std::string &url)
     auto relationships = manifest.relationships(ws.path(), relationship_type::hyperlink);
     auto relation = std::find_if(relationships.cbegin(), relationships.cend(),
         [&url](xlnt::relationship rel) { return rel.target().path().string() == url; });
-    if (relation != relationships.end()) {
+    if (relation != relationships.end())
+    {
         d_->hyperlink_.get().relationship = *relation;
     }
     else
@@ -400,29 +401,20 @@ void cell::hyperlink(const std::string &url)
             target_mode::external);
         // TODO: make manifest::register_relationship return the created relationship instead of rel id
         d_->hyperlink_.get().relationship = manifest.relationship(ws.path(), rel_id);
-    }   
-    
-    if (!has_value()) // hyperlink on an empty cell sets the value to the hyperlink string
+    }
+    // if a value is already present, the display string is ignored
+    if (has_value())
     {
-        value(url);
+        d_->hyperlink_.get().display.set(to_string());
+    }
+    else
+    {
+        d_->hyperlink_.get().display.set(display.empty() ? url : display);
+        value(hyperlink().display());
     }
 }
 
-void cell::hyperlink(const std::string &url, const std::string &display)
-{
-    if (!display.empty()) // if the display string isn't empty use that
-    {
-        value(display);
-    }
-    else // empty display string sets the value to the link text
-    {
-        value(url);
-    }
-    hyperlink(url);
-    d_->hyperlink_.get().display = display;
-}
-
-void cell::hyperlink(xlnt::cell target)
+void cell::hyperlink(xlnt::cell target, const std::string& display)
 {
     // TODO: should this computed value be a method on a cell?
     const auto cell_address = target.worksheet().title() + "!" + target.reference().to_string();
@@ -430,11 +422,19 @@ void cell::hyperlink(xlnt::cell target)
     d_->hyperlink_ = detail::hyperlink_impl();
     d_->hyperlink_.get().relationship = xlnt::relationship("", relationship_type::hyperlink,
         uri(""), uri(cell_address), target_mode::internal);
-    d_->hyperlink_.get().display = cell_address;
-    value(cell_address);
+    // if a value is already present, the display string is ignored
+    if (has_value())
+    {
+        d_->hyperlink_.get().display.set(to_string());
+    }
+    else
+    {
+        d_->hyperlink_.get().display.set(display.empty() ? cell_address : display);
+        value(hyperlink().display());
+    }
 }
 
-void cell::hyperlink(xlnt::range target)
+void cell::hyperlink(xlnt::range target, const std::string &display)
 {
     // TODO: should this computed value be a method on a cell?
     const auto range_address = target.worksheet().title() + "!" + target.reference().to_string();
@@ -442,8 +442,17 @@ void cell::hyperlink(xlnt::range target)
     d_->hyperlink_ = detail::hyperlink_impl();
     d_->hyperlink_.get().relationship = xlnt::relationship("", relationship_type::hyperlink,
         uri(""), uri(range_address), target_mode::internal);
-    d_->hyperlink_.get().display = range_address;
-    value(range_address);
+    
+    // if a value is already present, the display string is ignored
+    if (has_value())
+    {
+        d_->hyperlink_.get().display.set(to_string());
+    }
+    else
+    {
+        d_->hyperlink_.get().display.set(display.empty() ? range_address : display);
+        value(hyperlink().display());
+    }
 }
 
 void cell::formula(const std::string &formula)
@@ -828,8 +837,11 @@ void cell::value(const std::string &value_string, bool infer_type)
 
 void cell::clear_format()
 {
-    format().d_->references -= format().d_->references > 0 ? 1 : 0;
-    d_->format_.clear();
+    if (d_->format_.is_set())
+    {
+        format().d_->references -= format().d_->references > 0 ? 1 : 0;
+        d_->format_.clear();
+    }
 }
 
 void cell::clear_style()

source/cell/hyperlink.cpp

@@ -67,24 +67,49 @@ bool hyperlink::external() const
     return d_->relationship.target_mode() == target_mode::external;
 }
 
-void hyperlink::display(const std::string &value)
+bool hyperlink::has_display() const
 {
-    d_->display = value;
+    return d_->display.is_set();
 }
 
-std::string hyperlink::display() const
+void hyperlink::display(const std::string &value)
 {
-    return d_->display;
+    d_->display.set(value);
+}
+
+const std::string& hyperlink::display() const
+{
+    return d_->display.get();
+}
+
+bool hyperlink::has_tooltip() const
+{
+    return d_->tooltip.is_set();
 }
 
 void hyperlink::tooltip(const std::string &value)
 {
-    d_->tooltip = value;
+    d_->tooltip.set(value);
 }
 
-std::string hyperlink::tooltip() const
+const std::string& hyperlink::tooltip() const
 {
-    return d_->tooltip;
+    return d_->tooltip.get();
+}
+
+bool hyperlink::has_location() const
+{
+    return d_->location.is_set();
+}
+
+void hyperlink::location(const std::string &value)
+{
+    d_->location.set(value);
+}
+
+const std::string &hyperlink::location() const
+{
+    return d_->location.get();
 }
 
 } // namespace xlnt

source/detail/implementations/hyperlink_impl.hpp

@@ -26,15 +26,18 @@
 #include <string>
 
 #include <xlnt/packaging/relationship.hpp>
+#include <xlnt/utils/optional.hpp>
 
 namespace xlnt {
 namespace detail {
 
+// [serialised]
 struct hyperlink_impl
 {
     xlnt::relationship relationship;
-    std::string tooltip;
-    std::string display;
+    xlnt::optional<std::string> location;
+    xlnt::optional<std::string> tooltip;
+    xlnt::optional<std::string> display;
 };
 
 inline bool operator==(const hyperlink_impl &lhs, const hyperlink_impl &rhs)

tests/cell/cell_test_suite.cpp

@@ -37,11 +37,13 @@
 #include <xlnt/styles/protection.hpp>
 #include <xlnt/styles/style.hpp>
 #include <xlnt/worksheet/worksheet.hpp>
+#include <xlnt/worksheet/range.hpp>
 #include <xlnt/utils/date.hpp>
 #include <xlnt/utils/datetime.hpp>
 #include <xlnt/utils/time.hpp>
 #include <xlnt/utils/timedelta.hpp>
 
+
 class cell_test_suite : public test_suite
 {
 public:
@@ -665,13 +667,60 @@ private:
     {
         xlnt::workbook wb;
         auto cell = wb.active_sheet().cell("A1");
+        cell.value(123);
         xlnt_assert(!cell.has_hyperlink());
         xlnt_assert_throws(cell.hyperlink(), xlnt::invalid_attribute);
         xlnt_assert_throws(cell.hyperlink("notaurl"), xlnt::invalid_parameter);
         xlnt_assert_throws(cell.hyperlink(""), xlnt::invalid_parameter);
-        cell.hyperlink("http://example.com");
+        // link without optional display
+        const std::string link1("http://example.com");
+        cell.hyperlink(link1);
         xlnt_assert(cell.has_hyperlink());
-        xlnt_assert_equals(cell.hyperlink().relationship().target().to_string(), "http://example.com");
+        xlnt_assert(cell.hyperlink().external());
+        xlnt_assert_equals(cell.hyperlink().url(), link1);
+        xlnt_assert_equals(cell.hyperlink().relationship().target().to_string(), link1);
+        xlnt_assert_equals(cell.hyperlink().display(), link1);
+        // link with display 
+        const std::string link2("http://example2.com");
+        const std::string display_txt("notaurl");
+        cell.hyperlink(link2, display_txt);
+        xlnt_assert(cell.has_hyperlink());
+        xlnt_assert(cell.hyperlink().external());
+        xlnt_assert_equals(cell.hyperlink().url(), link2);
+        xlnt_assert_equals(cell.hyperlink().relationship().target().to_string(), link2);
+        xlnt_assert_equals(cell.hyperlink().display(), display_txt);
+        // cell overload without display
+        const std::string cell_target_str("A2");
+        auto cell_target = wb.active_sheet().cell(cell_target_str);
+        std::string link3 = wb.active_sheet().title() + '!' + cell_target_str; // Sheet1!A2
+        cell.hyperlink(cell_target);
+        xlnt_assert(cell.has_hyperlink());
+        xlnt_assert(!cell.hyperlink().external());
+        xlnt_assert_equals(cell.hyperlink().target_range(), link3);
+        xlnt_assert_equals(cell.hyperlink().display(), link3);
+        // cell overload with display
+        cell.hyperlink(cell_target, display_txt);
+        xlnt_assert(cell.has_hyperlink());
+        xlnt_assert(!cell.hyperlink().external());
+        xlnt_assert_equals(cell.hyperlink().target_range(), link3);
+        xlnt_assert_equals(cell.hyperlink().display(), display_txt);
+        // range overload without display
+        const std::string range_target_str("A2:A5");
+        xlnt::range range_target(wb.active_sheet(), xlnt::range_reference(range_target_str));
+        std::string link4 = wb.active_sheet().title() + '!' + range_target_str; // Sheet1!A2:A5
+        cell.hyperlink(range_target);
+        xlnt_assert(cell.has_hyperlink());
+        xlnt_assert(!cell.hyperlink().external());
+        xlnt_assert_equals(cell.hyperlink().target_range(), link4);
+        xlnt_assert_equals(cell.hyperlink().display(), link4);
+        // range overload with display
+        cell.hyperlink(range_target, display_txt);
+        xlnt_assert(cell.has_hyperlink());
+        xlnt_assert(!cell.hyperlink().external());
+        xlnt_assert_equals(cell.hyperlink().target_range(), link4);
+        xlnt_assert_equals(cell.hyperlink().display(), display_txt);
+        // value not touched
+        xlnt_assert_equals(cell.value<int>(), 123);
     }
 
     void test_comment()

tests/workbook/serialization_test_suite.cpp

@@ -575,7 +575,7 @@ public:
 
         std::vector<std::uint8_t> destination;
         source_workbook.save(destination);
-        source_workbook.save("temp.xlsx");
+        source_workbook.save("temp" + source.filename());
 
 #ifdef _MSC_VER
         std::ifstream source_stream(source.wstring(), std::ios::binary);

tests/worksheet/worksheet_test_suite.cpp

@@ -50,7 +50,6 @@ public:
         register_test(test_remove_named_range_bad);
         register_test(test_cell_alternate_coordinates);
         register_test(test_cell_range_name);
-        register_test(test_hyperlink_value);
         register_test(test_rows);
         register_test(test_no_rows);
         register_test(test_no_cols);
@@ -225,50 +224,6 @@ public:
         xlnt_assert(c_range_coord[0][0] == c_cell);
     }
 
-    void test_hyperlink_value()
-    {
-        xlnt::workbook wb;
-        auto ws = wb.active_sheet();
-        std::string test_link = "http://test.com";
-        xlnt::cell_reference test_cell("A1");
-        ws.cell(test_cell).hyperlink(test_link);
-        // when a hyperlink is added to an empty cell, the display text becomes == to the link
-        xlnt_assert_equals(ws.cell(test_cell).hyperlink().url(), test_link);
-        xlnt_assert_equals(ws.cell(test_cell).value<std::string>(), test_link);
-        // if the display value changes, the hyperlink remains the same
-        std::string test_string = "test";
-        ws.cell(test_cell).value(test_string);
-        xlnt_assert_equals(test_string, ws.cell(test_cell).value<std::string>());
-        xlnt_assert_equals(ws.cell(test_cell).hyperlink().url(), test_link);
-        // changing the link doesn't change the cell value
-        std::string test_link2 = "http://test-123.com";
-        ws.cell(test_cell).hyperlink(test_link2);
-        xlnt_assert_equals(test_string, ws.cell(test_cell).value<std::string>());
-        xlnt_assert_equals(ws.cell(test_cell).hyperlink().url(), test_link2);
-        // and we can edit both value and hyperlink together
-        std::string test_string3 = "123test";
-        std::string test_link3 = "http://123-test.com";
-        ws.cell(test_cell).hyperlink(test_link3, test_string3);
-        xlnt_assert_equals(test_string3, ws.cell(test_cell).value<std::string>());
-        xlnt_assert_equals(ws.cell(test_cell).hyperlink().url(), test_link3);
-        // hyperlinks can also be applied to cells with non-string values
-        int numeric_test_val = 123;
-        std::string test_link4 = "http://test-numeric.com";
-        xlnt::cell_reference numeric_test_cell("B1");
-        ws.cell(numeric_test_cell).value(numeric_test_val);
-        ws.cell(numeric_test_cell).hyperlink(test_link4);
-        xlnt_assert_equals(ws.cell(numeric_test_cell).hyperlink().url(), test_link4);
-        xlnt_assert_equals(ws.cell(numeric_test_cell).value<int>(), numeric_test_val);
-        // and there should be no issues if two cells use the same hyperlink
-        ws.cell(numeric_test_cell).hyperlink(test_link3); // still in use on 'A1'
-        // 'A1'
-        xlnt_assert_equals(test_string3, ws.cell(test_cell).value<std::string>());
-        xlnt_assert_equals(ws.cell(test_cell).hyperlink().url(), test_link3);
-        // 'B1'
-        xlnt_assert_equals(ws.cell(numeric_test_cell).hyperlink().url(), test_link3);
-        xlnt_assert_equals(ws.cell(numeric_test_cell).value<int>(), numeric_test_val);
-    }
-
     void test_rows()
     {
         xlnt::workbook wb;