Various fixes for pattern editor (#2561)

- Fix for vertical scroll bar being too far to the left.
- Fix constructor not initializing from const char pointer properly
- maxcolumn not being set for console text lines causing crashes on
empty pattern evaluation
- A replacement using replace all is now undone in one step.
- Find/replace no longer need to have enter or return key to accept
text. You can use arrows or shortcuts.
- More efficient search replace implementation with plans to add even
faster.
- Tooltips added to find/replace window
- Providers now save both horizontal and vertical scroll positions when
switching to another one and restore them when switching back. This is
independent to the cursor position which is also saved.
- Pattern editor no longer takes focus when changing providers via a tab
click. This has the effect that menus won't change by just clicking on a
tab.
- Small fixes and code refactoring.

(cherry picked from commit 1676342e28)

plugins/ui/include/ui/text_editor.hpp

@@ -114,23 +114,23 @@ namespace hex::ui {
             Coordinates m_cursorPosition;
         };
 
+        class UndoRecord;
+        class UndoAction;
+        using UndoBuffer = std::vector<UndoAction>;
+        using UndoRecords = std::vector<UndoRecord>;
+
         class FindReplaceHandler {
         public:
             FindReplaceHandler();
             using Matches = std::vector<EditorState>;
             Matches &getMatches() { return m_matches; }
-            bool findNext(TextEditor *editor);
+            bool findNext(TextEditor *editor, u64 &byteIndex);
             u32 findMatch(TextEditor *editor, i32 index);
             bool replace(TextEditor *editor, bool right);
             bool replaceAll(TextEditor *editor);
             std::string &getFindWord() { return m_findWord; }
 
-            void setFindWord(TextEditor *editor, const std::string &findWord) {
-                if (findWord != m_findWord) {
-                    findAllMatches(editor, findWord);
-                    m_findWord = findWord;
-                }
-            }
+            void setFindWord(TextEditor *editor, const std::string &findWord);
 
             std::string &getReplaceWord() { return m_replaceWord; }
             void setReplaceWord(const std::string &replaceWord) { m_replaceWord = replaceWord; }
@@ -139,37 +139,16 @@ namespace hex::ui {
             u32 findPosition(TextEditor *editor, Coordinates pos, bool isNext);
             bool getMatchCase() const { return m_matchCase; }
 
-            void setMatchCase(TextEditor *editor, bool matchCase) {
-                if (matchCase != m_matchCase) {
-                    m_matchCase = matchCase;
-                    m_optionsChanged = true;
-                    findAllMatches(editor, m_findWord);
-                }
-            }
+            void setMatchCase(TextEditor *editor, bool matchCase);
 
             bool getWholeWord() const { return m_wholeWord; }
-            void setWholeWord(TextEditor *editor, bool wholeWord) {
-                if (wholeWord != m_wholeWord) {
-                    m_wholeWord = wholeWord;
-                    m_optionsChanged = true;
-                    findAllMatches(editor, m_findWord);
-                }
-            }
+            void setWholeWord(TextEditor *editor, bool wholeWord);
 
             bool getFindRegEx() const { return m_findRegEx; }
-            void setFindRegEx(TextEditor *editor, bool findRegEx) {
-                if (findRegEx != m_findRegEx) {
-                    m_findRegEx = findRegEx;
-                    m_optionsChanged = true;
-                    findAllMatches(editor, m_findWord);
-                }
-            }
-
-            void resetMatches() {
-                m_matches.clear();
-                m_findWord = "";
-            }
+            void setFindRegEx(TextEditor *editor, bool findRegEx);
 
+            void resetMatches();
+            UndoRecords m_undoBuffer;
         private:
             std::string m_findWord;
             std::string m_replaceWord;
@@ -299,7 +278,7 @@ namespace hex::ui {
             enum class LinePart { Chars, Utf8, Colors, Flags };
 
             Line() : m_chars(""), m_colors(""), m_flags(""), m_colorized(false), m_lineMaxColumn(-1) {}
-            explicit Line(const char *line) { Line(std::string(line)); }
+            explicit Line(const char *line) : Line(std::string(line)) {}
             explicit Line(const std::string &line) : m_chars(line), m_colors(std::string(line.size(), 0x00)), m_flags(std::string(line.size(), 0x00)), m_colorized(false), m_lineMaxColumn(maxColumn()) {}
             Line(const Line &line) : m_chars(std::string(line.m_chars)), m_colors(std::string(line.m_colors)), m_flags(std::string(line.m_flags)), m_colorized(line.m_colorized), m_lineMaxColumn(line.m_lineMaxColumn) {}
             Line(Line &&line) noexcept : m_chars(std::move(line.m_chars)), m_colors(std::move(line.m_colors)), m_flags(std::move(line.m_flags)), m_colorized(line.m_colorized), m_lineMaxColumn(line.m_lineMaxColumn) {}
@@ -400,11 +379,11 @@ namespace hex::ui {
             UndoRecord() {}
             ~UndoRecord() {}
             UndoRecord( const std::string &added,
-                        const TextEditor::Range addedRange,
+                        const Range addedRange,
                         const std::string &removed,
-                        const TextEditor::Range removedRange,
-                        TextEditor::EditorState &before,
-                        TextEditor::EditorState &after);
+                        const Range removedRange,
+                        EditorState &before,
+                        EditorState &after);
 
             void undo(TextEditor *editor);
             void redo(TextEditor *editor);
@@ -417,7 +396,18 @@ namespace hex::ui {
             EditorState m_after;
         };
 
-        typedef std::vector<UndoRecord> UndoBuffer;
+        class UndoAction {
+        public:
+            UndoAction() {}
+            ~UndoAction() {}
+            explicit UndoAction(const UndoRecords &records) : m_records(records) {}
+            void undo(TextEditor *editor);
+            void redo(TextEditor *editor);
+        private:
+            UndoRecords m_records;
+        };
+
+
 
         struct MatchedBracket {
             bool m_active = false;
@@ -511,8 +501,8 @@ namespace hex::ui {
         void backspace();
         bool canUndo();
         bool canRedo() const;
-        void undo(i32 steps = 1);
-        void redo(i32 steps = 1);
+        void undo();
+        void redo();
         void copy();
         void cut();
         void paste();
@@ -559,8 +549,10 @@ namespace hex::ui {
         void moveEnd(bool select = false);
         void moveToMatchedBracket(bool select = false);
         void setScrollY();
+        void setScroll(ImVec2 scroll);
+        ImVec2 getScroll() const { return m_scroll; }
         Coordinates getCursorPosition()  { return setCoordinates(m_state.m_cursorPosition); }
-        void setCursorPosition(const Coordinates &position);
+        void setCursorPosition(const Coordinates &position, bool scrollToCursor = true);
         void setCursorPosition();
     private:
         Coordinates setCoordinates(const Coordinates &value);
@@ -591,8 +583,8 @@ namespace hex::ui {
         void clearRaiseContextMenu() { m_raiseContextMenu = false; }
         TextEditor *getSourceCodeEditor();
         bool isEmpty() const;
+        void addUndo(UndoRecords &value);
     private:
-        void addUndo(UndoRecord &value);
         TextEditor::PaletteIndex getColorIndexFromFlags(Line::Flags flags);
         void handleKeyboardInputs();
         void handleMouseInputs();
@@ -662,7 +654,9 @@ namespace hex::ui {
         std::vector<std::string> m_defines;
         TextEditor *m_sourceCodeEditor = nullptr;
         float m_shiftedScrollY = 0;
+        ImVec2 m_scroll=ImVec2(0, 0);
         float m_scrollYIncrement = 0.0F;
+        bool m_setScroll = false;
         bool m_setScrollY = false;
         float m_numberOfLinesDisplayed = 0;
         float m_lastClick = -1.0F;