add textbox:indexByPos and :lineY methods

src/graphics/ui/elements/Container.hpp

@@ -37,7 +37,9 @@ namespace gui {
         virtual void scrolled(int value) override;
         virtual void setScrollable(bool flag);
         void listenInterval(float interval, OnTimeOut callback, int repeat=-1);
-        virtual glm::vec2 getContentOffset() override {return glm::vec2(0.0f, scroll);};
+        virtual glm::vec2 getContentOffset() const override {
+            return glm::vec2(0.0f, scroll);
+        };
         virtual void setSize(const glm::vec2& size) override;
         virtual int getScrollStep() const;
         virtual void setScrollStep(int step);

src/graphics/ui/elements/TextBox.cpp

@@ -671,6 +671,11 @@ int TextBox::calcIndexAt(int x, int y) const {
     );
 }
 
+int TextBox::getLineYOffset(int line) const {
+    if (rawTextCache.fontId == 0) return 0;
+    return label->getLineYOffset(line) + getContentOffset().y;
+}
+
 static inline std::wstring get_alphabet(wchar_t c) {
     std::wstring alphabet {c};
     if ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z') || c == '_') {

src/graphics/ui/elements/TextBox.hpp

@@ -74,7 +74,6 @@ namespace gui {
 
         size_t normalizeIndex(int index);
 
-        int calcIndexAt(int x, int y) const;
         void setTextOffset(uint x);
         bool eraseSelected();
         void resetSelection();
@@ -186,6 +185,9 @@ namespace gui {
         /// @return line position in text
         virtual size_t getLinePos(uint line) const;
 
+        int calcIndexAt(int x, int y) const;
+        int getLineYOffset(int line) const;
+
         /// @brief Check text with validator set with setTextValidator
         /// @return true if text is valid
         virtual bool validate();

src/graphics/ui/elements/UINode.hpp

@@ -267,7 +267,7 @@ namespace gui {
         virtual glm::vec4 calcColor() const;
 
         /// @brief Get inner content offset. Used for scroll
-        virtual glm::vec2 getContentOffset() {return glm::vec2(0.0f);};
+        virtual glm::vec2 getContentOffset() const {return glm::vec2(0.0f);};
         /// @brief Calculate screen position of the element
         virtual glm::vec2 calcPos() const;
         virtual void setPos(const glm::vec2& pos);

src/logic/scripting/lua/libs/libgui.cpp

@@ -178,6 +178,24 @@ static int l_get_line_at(lua::State* L) {
     return 0;
 }
 
+static int l_get_index_by_pos(lua::State* L) {
+    auto node = get_document_node(L, 1);
+    auto position = lua::tovec2(L, 2);
+    if (auto box = dynamic_cast<TextBox*>(node.node.get())) {
+        return lua::pushinteger(L, box->calcIndexAt(position.x, position.y));
+    }
+    return 0;
+}
+
+static int l_get_line_y(lua::State* L) {
+    auto node = get_document_node(L, 1);
+    auto line = lua::tointeger(L, 2);
+    if (auto box = dynamic_cast<TextBox*>(node.node.get())) {
+        return lua::pushinteger(L, box->getLineYOffset(line));
+    }
+    return 0;
+}
+
 static int l_get_line_pos(lua::State* L) {
     auto node = get_document_node(L, 1);
     auto line = lua::tointeger(L, 2);
@@ -509,6 +527,12 @@ static int p_get_focused(UINode* node, lua::State* L) {
 static int p_get_line_at(UINode*, lua::State* L) {
     return lua::pushcfunction(L, l_get_line_at);
 }
+static int p_get_index_by_pos(UINode*, lua::State* L) {
+    return lua::pushcfunction(L, l_get_index_by_pos);
+}
+static int p_get_line_y(UINode*, lua::State* L) {
+    return lua::pushcfunction(L, l_get_line_y);
+}
 static int p_get_line_pos(UINode*, lua::State* L) {
     return lua::pushcfunction(L, l_get_line_pos);
 }
@@ -619,6 +643,8 @@ static int l_gui_getattr(lua::State* L) {
             {"edited", p_get_edited},
             {"lineNumbers", p_get_line_numbers},
             {"lineAt", p_get_line_at},
+            {"indexByPos", p_get_index_by_pos},
+            {"lineY", p_get_line_y},
             {"linePos", p_get_line_pos},
             {"syntax", p_get_syntax},
             {"markup", p_get_markup},