DebuggableEditor.hh

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#ifndef DEBUGGABLE_EDITOR_HH
#define DEBUGGABLE_EDITOR_HH
 
// Based on:
//     Mini memory editor for Dear ImGui (to embed in your game/tools)
//
//     Get latest version at http://www.github.com/ocornut/imgui_club
//     (See there for documentation and the (old) Changelog).
//
//     Licence: MIT
 
#include "ImGuiPart.hh"
 
#include <imgui.h>
 
#include <optional>
#include <string>
#include <vector>
 
namespace openmsx {
 
class Debuggable;
class ImGuiManager;
class SymbolManager;
 
class DebuggableEditor final : public ImGuiPart
{
        struct Sizes {
                int addrDigitsCount = 0;
                float lineHeight = 0.0f;
                float glyphWidth = 0.0f;
                float hexCellWidth = 0.0f;
                float spacingBetweenMidCols = 0.0f;
                float posHexStart = 0.0f;
                float posAsciiStart = 0.0f;
                float posAsciiEnd = 0.0f;
                float windowWidth = 0.0f;
        };
 
public:
        explicit DebuggableEditor(ImGuiManager& manager_, std::string debuggableName, size_t index);
        [[nodiscard]] std::string_view getDebuggableName() const { return {title.data(), debuggableNameSize}; }
 
        // ImGuiPart
        [[nodiscard]] zstring_view iniName() const override { return title; }
        void save(ImGuiTextBuffer& buf) override;
        void loadLine(std::string_view name, zstring_view value) override;
        void loadEnd() override;
        void paint(MSXMotherBoard* motherBoard) override;
 
public:
        bool open = true;
 
private:
        [[nodiscard]] Sizes calcSizes(unsigned memSize) const;
        [[nodiscard]] std::string formatAddr(const Sizes& s, unsigned addr) const;
        void setStrings(const Sizes& s, Debuggable& debuggable);
        bool setAddr(const Sizes& s, Debuggable& debuggable, unsigned memSize, unsigned addr);
        void scrollAddr(const Sizes& s, Debuggable& debuggable, unsigned memSize, unsigned addr);
 
        void drawContents(const Sizes& s, Debuggable& debuggable, unsigned memSize);
        void drawSearch(const Sizes& s, Debuggable& debuggable, unsigned memSize);
        void parseSearchString(std::string_view str);
        void search(const Sizes& s, Debuggable& debuggable, unsigned memSize);
        [[nodiscard]] bool match(Debuggable& debuggable, unsigned memSize, unsigned addr);
        void drawPreviewLine(const Sizes& s, Debuggable& debuggable, unsigned memSize);
 
private:
        enum AddressMode : int {CURSOR, EXPRESSION};
        enum class SearchType : int {HEX, ASCII};
        enum class SearchHighlight : int {NONE, SINGLE, ALL};
        enum class SearchDirection : int {FWD, BWD};
        enum PreviewEndianess : int {LE, BE};
 
        SymbolManager& symbolManager;
        std::string title; // debuggableName + suffix
        size_t debuggableNameSize;
 
        // Settings
        static constexpr int MAX_COLUMNS = 64;
        int  columns = 16;            // number of columns to display.
        bool showAscii = true;        // display ASCII representation on the right side.
        bool showAddress = true;      // display the address bar (e.g. on small views it can make sense to hide this)
        bool showSearch = false;      // display search functionality
        bool showDataPreview = false; // display a footer previewing the decimal/binary/hex/float representation of the currently selected bytes.
        bool greyOutZeroes = true;    // display null/zero bytes using the TextDisabled color.
        std::string addrExpr;
        std::string searchString;
        unsigned currentAddr = 0;
        int addrMode = CURSOR;
        int searchType = static_cast<int>(SearchType::HEX);
        int searchHighlight = static_cast<int>(SearchHighlight::SINGLE);
        int searchDirection = static_cast<int>(SearchDirection::FWD);
        int previewEndianess = LE;
        ImGuiDataType previewDataType = ImGuiDataType_U8;
 
        static constexpr auto persistentElements = std::tuple{
                PersistentElement   {"open",             &DebuggableEditor::open},
                PersistentElementMax{"columns",          &DebuggableEditor::columns, MAX_COLUMNS + 1},
                PersistentElement   {"showAscii",        &DebuggableEditor::showAscii},
                PersistentElement   {"showAddress",      &DebuggableEditor::showAddress},
                PersistentElement   {"showSearch",       &DebuggableEditor::showSearch},
                PersistentElement   {"showDataPreview",  &DebuggableEditor::showDataPreview},
                PersistentElement   {"greyOutZeroes",    &DebuggableEditor::greyOutZeroes},
                PersistentElement   {"addrExpr",         &DebuggableEditor::addrExpr},
                PersistentElement   {"searchString",     &DebuggableEditor::searchString},
                PersistentElement   {"currentAddr",      &DebuggableEditor::currentAddr},
                PersistentElementMax{"addrMode",         &DebuggableEditor::addrMode, 2},
                PersistentElementMax{"searchType",       &DebuggableEditor::searchType, 2},
                PersistentElementMax{"searchHighlight",  &DebuggableEditor::searchHighlight, 2},
                PersistentElementMax{"searchDirection",  &DebuggableEditor::searchDirection, 2},
                PersistentElementMax{"previewEndianess", &DebuggableEditor::previewEndianess, 2},
                PersistentElementMax{"previewDataType",  &DebuggableEditor::previewDataType, 8}
        };
 
        // [Internal State]
        std::string dataInput;
        std::string addrStr;
        std::optional<std::vector<uint8_t>> searchPattern;
        std::optional<unsigned> searchResult;
        enum EditType { HEX, ASCII };
        EditType dataEditingActive = HEX;
        bool dataEditingTakeFocus = true;
        bool updateAddr = false;
};
 
} // namespace openmsx
 
#endif