fix multiline width calculation & feat: multiline tooltips support

src/graphics/core/Font.cpp

@@ -38,11 +38,11 @@ bool Font::isPrintableChar(uint codepoint) const {
     }
 }
 
-int Font::calcWidth(const std::wstring& text, size_t length) const {
+int Font::calcWidth(std::wstring_view text, size_t length) const {
     return calcWidth(text, 0, length);
 }
 
-int Font::calcWidth(const std::wstring& text, size_t offset, size_t length) const {
+int Font::calcWidth(std::wstring_view text, size_t offset, size_t length) const {
     return std::min(text.length()-offset, length) * glyphInterval;
 }
 

src/graphics/core/Font.hpp

@@ -56,14 +56,14 @@ public:
     /// @param text selected text
     /// @param length max substring length (default: no limit)
     /// @return pixel width of the substring 
-    int calcWidth(const std::wstring& text, size_t length=-1) const;
+    int calcWidth(std::wstring_view text, size_t length=-1) const;
 
     /// @brief Calculate text width in pixels
     /// @param text selected text
     /// @param offset start of the substring
     /// @param length max substring length
     /// @return pixel width of the substring
-    int calcWidth(const std::wstring& text, size_t offset, size_t length) const;
+    int calcWidth(std::wstring_view text, size_t offset, size_t length) const;
 
     /// @brief Check if character is visible (non-whitespace)
     /// @param codepoint character unicode codepoint