Make text editor a bit more useful, and resizable

Signed-off-by: falkTX <falktx@falktx.com>

plugins/Cardinal/plugin.json

@@ -80,7 +80,7 @@
       "slug": "TextEditor",
       "disabled": false,
       "name": "Text Editor",
-      "description": "A embed text editor inside Cardinal",
+      "description": "An embed text editor inside Cardinal",
       "tags": [
         "Utility"
       ]

plugins/Cardinal/src/ImGuiTextEditor.cpp

@@ -25,40 +25,20 @@
 #include "ImGuiTextEditor.hpp"
 #include "DearImGuiColorTextEditor/TextEditor.h"
 
+#include <fstream>
+
 // --------------------------------------------------------------------------------------------------------------------
 
 struct ImGuiTextEditor::PrivateData {
-    ImGuiTextEditor* const self;
     TextEditor editor;
     std::string file;
-
-    explicit PrivateData(ImGuiTextEditor* const s)
-        : self(s)
-    {
-        // https://github.com/BalazsJako/ColorTextEditorDemo/blob/master/main.cpp
-
-        editor.SetLanguageDefinition(TextEditor::LanguageDefinition::CPlusPlus());
-        editor.SetText(""
-        "// Welcome to a real text editor inside Cardinal\n"
-        "\n"
-        "#define I_AM_A_MACRO\n"
-        "\n"
-        "int and_i_am_a_variable;\n"
-        "\n"
-        "/* look ma, a comment! */\n"
-        "int such_highlight_much_wow() { return 1337; }\n"
-        );
-        editor.SetCursorPosition(TextEditor::Coordinates(8, 0));
-    }
-
-    DISTRHO_DECLARE_NON_COPYABLE(PrivateData)
 };
 
 // --------------------------------------------------------------------------------------------------------------------
 
 ImGuiTextEditor::ImGuiTextEditor()
     : ImGuiWidget(),
-      pData(new PrivateData(this)) {}
+      pData(new PrivateData) {}
 
 ImGuiTextEditor::~ImGuiTextEditor()
 {
@@ -67,8 +47,35 @@ ImGuiTextEditor::~ImGuiTextEditor()
 
 // --------------------------------------------------------------------------------------------------------------------
 
+bool ImGuiTextEditor::setFile(const std::string& file)
+{
+    std::ifstream f(file);
+
+    if (! f.good())
+    {
+        pData->file.clear();
+        return false;
+    }
+
+    pData->file = file;
+    pData->editor.SetText(std::string((std::istreambuf_iterator<char>(f)), std::istreambuf_iterator<char>()));
+    return true;
+}
+
+void ImGuiTextEditor::setFileWithKnownText(const std::string& file, const std::string& text)
+{
+    pData->file = file;
+    pData->editor.SetText(text);
+}
+
+std::string ImGuiTextEditor::getFile() const
+{
+    return pData->file;
+}
+
 void ImGuiTextEditor::setText(const std::string& text)
 {
+    pData->file.clear();
     pData->editor.SetText(text);
 }
 
@@ -79,6 +86,7 @@ std::string ImGuiTextEditor::getText() const
 
 void ImGuiTextEditor::setTextLines(const std::vector<std::string>& lines)
 {
+    pData->file.clear();
     pData->editor.SetTextLines(lines);
 }
 

plugins/Cardinal/src/ImGuiTextEditor.hpp

@@ -38,6 +38,10 @@ struct ImGuiTextEditor : ImGuiWidget
     ImGuiTextEditor();
     ~ImGuiTextEditor() override;
 
+    bool setFile(const std::string& file);
+    void setFileWithKnownText(const std::string& file, const std::string& text);
+    std::string getFile() const;
+
    /**
       Methods from internal TextEdit.
     */

plugins/Cardinal/src/TextEditor.cpp

@@ -26,66 +26,198 @@
 
 // --------------------------------------------------------------------------------------------------------------------
 
+// defaults
+#define DEFAULT_LANG "C++"
+#define DEFAULT_TEXT "" \
+"// Welcome to a real text editor inside Cardinal\n\n"  \
+"#define I_AM_A_MACRO\n\n"                              \
+"int and_i_am_a_variable;\n\n"                          \
+"/* look ma, a comment! */\n"                           \
+"int such_highlight_much_wow() { return 1337; }\n"
+#define DEFAULT_WIDTH 30
+
+// utils
+static const TextEditor::LanguageDefinition& getLangFromString(const std::string& lang)
+{
+    if (lang == "AngelScript")
+        return TextEditor::LanguageDefinition::AngelScript();
+    if (lang == "C")
+        return TextEditor::LanguageDefinition::C();
+    if (lang == "C++")
+        return TextEditor::LanguageDefinition::CPlusPlus();
+    if (lang == "GLSL")
+        return TextEditor::LanguageDefinition::GLSL();
+    if (lang == "HLSL")
+        return TextEditor::LanguageDefinition::HLSL();
+    if (lang == "Lua")
+        return TextEditor::LanguageDefinition::Lua();
+    if (lang == "SQL")
+        return TextEditor::LanguageDefinition::SQL();
+
+    static const TextEditor::LanguageDefinition none;
+    return none;
+}
+
 struct TextEditorModule : Module {
-    enum ParamIds {
-        NUM_PARAMS
-    };
-    enum InputIds {
-        NUM_INPUTS
-    };
-    enum OutputIds {
-        NUM_OUTPUTS
-    };
-    enum LightIds {
-        NUM_LIGHTS
-    };
+    std::string file;
+    std::string lang = DEFAULT_LANG;
+    std::string text = DEFAULT_TEXT;
+    int width = DEFAULT_WIDTH;
+#ifndef HEADLESS
+    WeakPtr<ImGuiTextEditor> widgetPtr;
+#endif
 
-    TextEditorModule()
+    json_t* dataToJson() override
     {
-        config(NUM_PARAMS, NUM_INPUTS, NUM_OUTPUTS, NUM_LIGHTS);
+        json_t* rootJ = json_object();
+        json_object_set_new(rootJ, "filepath", json_string(file.c_str()));
+        json_object_set_new(rootJ, "lang", json_string(lang.c_str()));
+        json_object_set_new(rootJ, "text", json_string(text.c_str()));
+        json_object_set_new(rootJ, "width", json_integer(width));
+        return rootJ;
     }
 
-    ~TextEditorModule() override
+    void dataFromJson(json_t* const rootJ) override
     {
+        if (json_t* const widthJ = json_object_get(rootJ, "width"))
+            width = json_integer_value(widthJ);
+
+        if (json_t* const langJ = json_object_get(rootJ, "lang"))
+        {
+            lang = json_string_value(langJ);
+#ifndef HEADLESS
+            // if (ImGuiTextEditor* const widget = widgetPtr)
+               // widget->SetLanguageDefinition(getLangFromString(lang));
+#endif
+        }
+
+        if (json_t* const filepathJ = json_object_get(rootJ, "filepath"))
+        {
+            const char* const filepath = json_string_value(filepathJ);
+
+            if (filepath[0] != '\0')
+            {
+                std::ifstream f(filepath);
+
+                if (f.good())
+                {
+                    file = filepath;
+                    text = std::string((std::istreambuf_iterator<char>(f)), std::istreambuf_iterator<char>());
+#ifndef HEADLESS
+                    if (ImGuiTextEditor* const widget = widgetPtr)
+                        widget->setFileWithKnownText(file, text);
+#endif
+                    return;
+                }
+            }
+        }
+
+        if (json_t* const textJ = json_object_get(rootJ, "text"))
+        {
+            text = json_string_value(textJ);
+#ifndef HEADLESS
+            if (ImGuiTextEditor* const widget = widgetPtr)
+                widget->setText(text);
+#endif
+        }
     }
 
-    void process(const ProcessArgs&) override
+    bool loadFileFromMenuAction(const char* const filepath)
     {
-    }
+        std::ifstream f(filepath);
 
-    DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(TextEditorModule)
+        if (f.good())
+        {
+            file = filepath;
+            text = std::string((std::istreambuf_iterator<char>(f)), std::istreambuf_iterator<char>());
+            return true;
+        }
+
+        return false;
+    }
 };
 
+#ifndef HEADLESS
 // --------------------------------------------------------------------------------------------------------------------
 
-#ifndef HEADLESS
-struct TextEditorWidget : ImGuiTextEditor
-{
-    TextEditorWidget() : ImGuiTextEditor() {}
+struct TextEditorLangSelectItem : MenuItem {
+    TextEditorModule* const module;
+    ImGuiTextEditor* const widget;
+
+    TextEditorLangSelectItem(TextEditorModule* const textEditorModule,
+                             ImGuiTextEditor* const textEditorWidget,
+                             const char* const textToUse)
+        : module(textEditorModule),
+          widget(textEditorWidget)
+    {
+        text = textToUse;
+    }
 
-    DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(TextEditorWidget)
+    void onAction(const event::Action &e) override
+    {
+        module->lang = text;
+        // widget->SetLanguageDefinition(getLangFromString(text));
+    }
+};
+
+struct TextEditorLangSelectMenu : Menu {
+    TextEditorLangSelectMenu(TextEditorModule* const module, ImGuiTextEditor* const widget)
+    {
+        addChild(new TextEditorLangSelectItem(module, widget, "None"));
+        addChild(new TextEditorLangSelectItem(module, widget, "AngelScript"));
+        addChild(new TextEditorLangSelectItem(module, widget, "C"));
+        addChild(new TextEditorLangSelectItem(module, widget, "C++"));
+        addChild(new TextEditorLangSelectItem(module, widget, "GLSL"));
+        addChild(new TextEditorLangSelectItem(module, widget, "HLSL"));
+        addChild(new TextEditorLangSelectItem(module, widget, "Lua"));
+        addChild(new TextEditorLangSelectItem(module, widget, "SQL"));
+    }
+};
+
+struct TextEditorLangSelectMenuItem : MenuItem {
+    TextEditorModule* const module;
+    ImGuiTextEditor* const widget;
+
+    TextEditorLangSelectMenuItem(TextEditorModule* const textEditorModule, ImGuiTextEditor* const textEditorWidget)
+        : module(textEditorModule),
+          widget(textEditorWidget)
+    {
+        text = "Syntax Highlight";
+    }
+
+    void onAction(const event::Action &e) override
+    {
+        // TODO
+        // new TextEditorLangSelectMenu(module, widget);
+    }
 };
 
 // --------------------------------------------------------------------------------------------------------------------
 
 struct TextEditorLoadFileItem : MenuItem {
-    TextEditorWidget* widget = nullptr;
+    TextEditorModule* const module;
+    ImGuiTextEditor* const widget;
+
+    TextEditorLoadFileItem(TextEditorModule* const textEditorModule, ImGuiTextEditor* const textEditorWidget)
+        : module(textEditorModule),
+          widget(textEditorWidget)
+    {
+        text = "Load File";
+    }
 
     void onAction(const event::Action &e) override
     {
-        WeakPtr<TextEditorWidget> widget = this->widget;
-        async_dialog_filebrowser(false, nullptr, "Load File", [widget](char* path)
+        TextEditorModule* const module = this->module;;
+        WeakPtr<ImGuiTextEditor> widget = this->widget;
+
+        async_dialog_filebrowser(false, nullptr, text.c_str(), [module, widget](char* path)
         {
             if (path)
             {
-                if (widget)
+                if (module->loadFileFromMenuAction(path))
                 {
-                    std::ifstream f(path);
-                    if (f.good())
-                    {
-                        const std::string str((std::istreambuf_iterator<char>(f)), std::istreambuf_iterator<char>());
-                        widget->setText(str);
-                    }
+                    if (widget)
+                        widget->setFileWithKnownText(module->file, module->text);
                 }
                 free(path);
             }
@@ -95,35 +227,144 @@ struct TextEditorLoadFileItem : MenuItem {
 
 // --------------------------------------------------------------------------------------------------------------------
 
+/**
+ * Code adapted from VCVRack's Blank.cpp
+ * Copyright (C) 2016-2021 VCV.
+ *
+ * This program is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 3 of
+ * the License, or (at your option) any later version.
+ */
+
+struct ModuleResizeHandle : OpaqueWidget {
+    TextEditorModule* const module;
+    ModuleWidget* const widget;
+    const bool right;
+    Vec dragPos;
+    Rect originalBox;
+
+    ModuleResizeHandle(TextEditorModule* const textEditorModule, ModuleWidget* const moduleWidget, const bool r)
+        : module(textEditorModule),
+          widget(moduleWidget),
+          right(r)
+    {
+        box.size = Vec(RACK_GRID_WIDTH * 1, RACK_GRID_HEIGHT);
+    }
+
+    void onDragStart(const DragStartEvent& e) override
+    {
+        if (e.button != GLFW_MOUSE_BUTTON_LEFT)
+            return;
+
+        dragPos = APP->scene->rack->getMousePos();
+        originalBox = widget->box;
+    }
+
+    void onDragMove(const DragMoveEvent& e) override
+    {
+        static const float kMinWidth = 10 * RACK_GRID_WIDTH;
+
+        Vec newDragPos = APP->scene->rack->getMousePos();
+        float deltaX = newDragPos.x - dragPos.x;
+
+        Rect newBox = originalBox;
+        Rect oldBox = widget->box;
+        if (right) {
+            newBox.size.x += deltaX;
+            newBox.size.x = std::fmax(newBox.size.x, kMinWidth);
+            newBox.size.x = std::round(newBox.size.x / RACK_GRID_WIDTH) * RACK_GRID_WIDTH;
+        }
+        else {
+            newBox.size.x -= deltaX;
+            newBox.size.x = std::fmax(newBox.size.x, kMinWidth);
+            newBox.size.x = std::round(newBox.size.x / RACK_GRID_WIDTH) * RACK_GRID_WIDTH;
+            newBox.pos.x = originalBox.pos.x + originalBox.size.x - newBox.size.x;
+        }
+
+        // Set box and test whether it's valid
+        widget->box = newBox;
+        if (!APP->scene->rack->requestModulePos(widget, newBox.pos)) {
+            widget->box = oldBox;
+        }
+        module->width = std::round(widget->box.size.x / RACK_GRID_WIDTH);
+    }
+
+    void draw(const DrawArgs& args) override
+    {
+        for (float x = 5.0; x <= 10.0; x += 5.0)
+        {
+            nvgBeginPath(args.vg);
+            const float margin = 5.0;
+            nvgMoveTo(args.vg, x + 0.5, margin + 0.5);
+            nvgLineTo(args.vg, x + 0.5, box.size.y - margin + 0.5);
+            nvgStrokeWidth(args.vg, 1.0);
+            nvgStrokeColor(args.vg, nvgRGBAf(0.5, 0.5, 0.5, 0.5));
+            nvgStroke(args.vg);
+        }
+    }
+};
+
+// --------------------------------------------------------------------------------------------------------------------
+
 struct TextEditorModuleWidget : ModuleWidget {
-    TextEditorWidget* textEditorWidget = nullptr;
+    TextEditorModule* textEditorModule = nullptr;
+    ImGuiTextEditor* textEditorWidget = nullptr;
+    Widget* panelBorder;
+    ModuleResizeHandle* rightHandle;
 
     TextEditorModuleWidget(TextEditorModule* const module)
     {
         setModule(module);
-        setPanel(APP->window->loadSvg(asset::plugin(pluginInstance, "res/Ildaeil.svg")));
+        addChild(panelBorder = new PanelBorder);
+        addChild(rightHandle = new ModuleResizeHandle(module, this, true));
+        addChild(new ModuleResizeHandle(module, this, false));
 
         if (module != nullptr)
         {
-            textEditorWidget = new TextEditorWidget();
-            textEditorWidget->box.pos = Vec(2 * RACK_GRID_WIDTH, 0);
-            textEditorWidget->box.size = Vec(box.size.x - 2 * RACK_GRID_WIDTH, box.size.y);
+            box.size = Vec(RACK_GRID_WIDTH * module->width, RACK_GRID_HEIGHT);
+            textEditorModule = module;
+            textEditorWidget = new ImGuiTextEditor();
+            textEditorWidget->setFileWithKnownText(module->file, module->text);
+            textEditorWidget->box.pos = Vec(RACK_GRID_WIDTH, 0);
+            textEditorWidget->box.size = Vec((module->width - 2) * RACK_GRID_WIDTH, box.size.y);
             addChild(textEditorWidget);
         }
+        else
+        {
+            box.size = Vec(RACK_GRID_WIDTH * DEFAULT_WIDTH, RACK_GRID_HEIGHT);
+        }
+    }
 
-        addChild(createWidget<ScrewBlack>(Vec(0, 0)));
-        addChild(createWidget<ScrewBlack>(Vec(0, RACK_GRID_HEIGHT - RACK_GRID_WIDTH)));
-        addChild(createWidget<ScrewBlack>(Vec(RACK_GRID_WIDTH, 0)));
-        addChild(createWidget<ScrewBlack>(Vec(RACK_GRID_WIDTH, RACK_GRID_HEIGHT - RACK_GRID_WIDTH)));
+    void appendContextMenu(Menu *menu) override
+    {
+        menu->addChild(new MenuSeparator);
+        menu->addChild(new TextEditorLoadFileItem(textEditorModule, textEditorWidget));
+        // TODO
+        // menu->addChild(new TextEditorLangSelectMenuItem(textEditorModule, textEditorWidget));
     }
 
-    void appendContextMenu(Menu *menu) override {
-        menu->addChild(new MenuEntry);
+    void step() override
+    {
+        if (textEditorModule)
+        {
+            box.size.x = textEditorModule->width * RACK_GRID_WIDTH;
+            textEditorWidget->box.size.x = (textEditorModule->width - 2) * RACK_GRID_WIDTH;
+        }
+
+        panelBorder->box.size = box.size;
+        rightHandle->box.pos.x = box.size.x - rightHandle->box.size.x;
 
-        TextEditorLoadFileItem* loadFileItem = new TextEditorLoadFileItem;
-        loadFileItem->text = "Load File";
-        loadFileItem->widget = textEditorWidget;
-        menu->addChild(loadFileItem);
+        ModuleWidget::step();
+    }
+
+    void draw(const DrawArgs& args) override
+    {
+        nvgBeginPath(args.vg);
+        nvgRect(args.vg, 0.0, 0.0, box.size.x, box.size.y);
+        nvgFillColor(args.vg, nvgRGB(0x20, 0x20, 0x20));
+        nvgFill(args.vg);
+        ModuleWidget::draw(args);
     }
 
     DISTRHO_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR(TextEditorModuleWidget)