Allow code panel to be resized

src/App.tsx

@@ -28,6 +28,7 @@ import { pythonGenerator } from 'blockly/python';
 import Header from './reactComponents/Header';
 import * as Menu from './reactComponents/Menu';
 import CodeDisplay from './reactComponents/CodeDisplay';
+import SiderCollapseTrigger from './reactComponents/SiderCollapseTrigger';
 import BlocklyComponent, { BlocklyComponentType } from './reactComponents/BlocklyComponent';
 import ToolboxSettingsModal from './reactComponents/ToolboxSettings';
 import * as Tabs from './reactComponents/Tabs';
@@ -81,7 +82,7 @@ const FULL_HEIGHT = '100%';
 const CODE_PANEL_DEFAULT_SIZE = '25%';
 
 /** Minimum size for code panel. */
-const CODE_PANEL_MIN_SIZE = 80;
+const CODE_PANEL_MIN_SIZE = 100;
 
 /** Background color for testing layout. */
 const LAYOUT_BACKGROUND_COLOR = '#0F0';
@@ -166,7 +167,10 @@ const AppContent: React.FC<AppContentProps> = ({ project, setProject }): React.J
   const [shownPythonToolboxCategories, setShownPythonToolboxCategories] = React.useState<Set<string>>(new Set());
   const [triggerPythonRegeneration, setTriggerPythonRegeneration] = React.useState(0);
   const [leftCollapsed, setLeftCollapsed] = React.useState(false);
-  const [rightCollapsed, setRightCollapsed] = React.useState(false);
+  const [codePanelSize, setCodePanelSize] = React.useState<string | number>(CODE_PANEL_DEFAULT_SIZE);
+  const [codePanelCollapsed, setCodePanelCollapsed] = React.useState(false);
+  const [codePanelExpandedSize, setCodePanelExpandedSize] = React.useState<string | number>(CODE_PANEL_DEFAULT_SIZE);
+  const [codePanelAnimating, setCodePanelAnimating] = React.useState(false);
   const [theme, setTheme] = React.useState('dark');
   const [languageInitialized, setLanguageInitialized] = React.useState(false);
   const [themeInitialized, setThemeInitialized] = React.useState(false);
@@ -378,6 +382,30 @@ const AppContent: React.FC<AppContentProps> = ({ project, setProject }): React.J
     setToolboxSettingsModalIsOpen(false);
   };
 
+  /** Toggles the code panel between collapsed and expanded states. */
+  const toggleCodePanelCollapse = (): void => {
+    setCodePanelAnimating(true);
+
+    if (codePanelCollapsed) {
+      // Expand to previous size
+      setCodePanelSize(codePanelExpandedSize);
+      setCodePanelCollapsed(false);
+    } else {
+      // Collapse to minimum size - convert current size to pixels for storage
+      const currentSizePx = typeof codePanelSize === 'string'
+        ? (parseFloat(codePanelSize) / 100) * window.innerWidth
+        : codePanelSize;
+      setCodePanelExpandedSize(currentSizePx);
+      setCodePanelSize(CODE_PANEL_MIN_SIZE);
+      setCodePanelCollapsed(true);
+    }
+
+    // Reset animation flag after transition completes
+    setTimeout(() => {
+      setCodePanelAnimating(false);
+    }, 200);
+  };
+
   /** Handles toolbox settings modal OK with updated categories. */
   const handleToolboxSettingsConfirm = (updatedShownCategories: Set<string>): void => {
     setToolboxSettingsModalIsOpen(false);
@@ -618,6 +646,8 @@ const AppContent: React.FC<AppContentProps> = ({ project, setProject }): React.J
               collapsible
               collapsed={leftCollapsed}
               onCollapse={(collapsed: boolean) => setLeftCollapsed(collapsed)}
+              trigger={null}
+              style={{ position: 'relative' }}
             >
               <Menu.Component
                 storage={storage}
@@ -629,6 +659,10 @@ const AppContent: React.FC<AppContentProps> = ({ project, setProject }): React.J
                 theme={theme}
                 setTheme={setTheme}
               />
+              <SiderCollapseTrigger
+                collapsed={leftCollapsed}
+                onToggle={() => setLeftCollapsed(!leftCollapsed)}
+              />
             </Sider>
             <Antd.Layout>
               <Tabs.Component
@@ -642,8 +676,8 @@ const AppContent: React.FC<AppContentProps> = ({ project, setProject }): React.J
                 setProject={setProject}
                 storage={storage}
               />
-              <Antd.Layout>
-                <Content>
+              <div style={{ display: 'flex', height: FULL_HEIGHT }}>
+                <Content style={{ flex: 1, height: '100%' }}>
                   {modulePaths.current.map((modulePath) => (
                     <BlocklyComponent
                       key={modulePath}
@@ -654,22 +688,69 @@ const AppContent: React.FC<AppContentProps> = ({ project, setProject }): React.J
                     />
                   ))}
                 </Content>
-                <Sider
-                  collapsible
-                  reverseArrow={true}
-                  collapsed={rightCollapsed}
-                  collapsedWidth={CODE_PANEL_MIN_SIZE}
-                  width={CODE_PANEL_DEFAULT_SIZE}
-                  onCollapse={(collapsed: boolean) => setRightCollapsed(collapsed)}
+                <div
+                  style={{
+                    width: typeof codePanelSize === 'string' ? codePanelSize : `${codePanelSize}px`,
+                    minWidth: CODE_PANEL_MIN_SIZE,
+                    height: '100%',
+                    borderLeft: '1px solid #d9d9d9',
+                    position: 'relative',
+                    transition: codePanelAnimating ? 'width 0.2s ease' : 'none'
+                  }}
                 >
+                  <div
+                    style={{
+                      position: 'absolute',
+                      left: 0,
+                      top: 0,
+                      width: '4px',
+                      height: '100%',
+                      cursor: 'ew-resize',
+                      backgroundColor: 'transparent',
+                      zIndex: 10,
+                      transform: 'translateX(-2px)'
+                    }}
+                    onMouseDown={(e) => {
+                      e.preventDefault();
+                      const startX = e.clientX;
+                      const startWidth = codePanelSize;
+
+                      const handleMouseMove = (e: MouseEvent) => {
+                        const deltaX = startX - e.clientX;
+                        // Convert startWidth to number if it's a percentage
+                        const startWidthPx = typeof startWidth === 'string' 
+                          ? (parseFloat(startWidth) / 100) * window.innerWidth
+                          : startWidth;
+                        const newWidth = Math.max(CODE_PANEL_MIN_SIZE, startWidthPx + deltaX);
+                        setCodePanelSize(newWidth);
+                        // Update expanded size if not at minimum
+                        if (newWidth > CODE_PANEL_MIN_SIZE) {
+                          setCodePanelExpandedSize(newWidth);
+                          setCodePanelCollapsed(false);
+                        } else {
+                          setCodePanelCollapsed(true);
+                        }
+                      };
+
+                      const handleMouseUp = () => {
+                        document.removeEventListener('mousemove', handleMouseMove);
+                        document.removeEventListener('mouseup', handleMouseUp);
+                      };
+
+                      document.addEventListener('mousemove', handleMouseMove);
+                      document.addEventListener('mouseup', handleMouseUp);
+                    }}
+                  />
                   <CodeDisplay
                     generatedCode={generatedCode}
                     messageApi={messageApi}
                     setAlertErrorMessage={setAlertErrorMessage}
                     theme={theme}
+                    isCollapsed={codePanelCollapsed}
+                    onToggleCollapse={toggleCodePanelCollapse}
                   />
-                </Sider>
-              </Antd.Layout>
+                </div>
+              </div>
             </Antd.Layout>
           </Antd.Layout>
         </Antd.Layout>

src/i18n/locales/en/translation.json

@@ -43,6 +43,8 @@
     "BLOCKS": "Blocks",
     "CODE": "Code",
     "COPY": "Copy",
+    "COLLAPSE": "Collapse",
+    "EXPAND": "Expand",
     "FAILED_TO_RENAME_PROJECT": "Failed to rename project",
     "FAILED_TO_COPY_PROJECT": "Failed to copy project",
     "FAILED_TO_CREATE_PROJECT": "Failed to create a new project.",

src/i18n/locales/es/translation.json

@@ -40,6 +40,8 @@
     "BLOCKS": "Bloques",
     "CODE": "Código",
     "COPY": "Copiar",
+    "COLLAPSE": "Colapsar",
+    "EXPAND": "Expandir",
     "FAILED_TO_RENAME_PROJECT": "Error al renombrar proyecto",
     "FAILED_TO_COPY_PROJECT": "Error al copiar proyecto",
     "FAILED_TO_CREATE_PROJECT": "Error al crear un nuevo proyecto.",

src/i18n/locales/he/translation.json

@@ -43,6 +43,8 @@
   "BLOCKS": "בלוקים",
   "CODE": "קוד",
   "COPY": "העתק",
+  "COLLAPSE": "כווץ",
+  "EXPAND": "הרחב",
     "FAILED_TO_RENAME_PROJECT": "נכשל בשינוי שם הפרויקט",
     "FAILED_TO_COPY_PROJECT": "נכשל בהעתקת הפרויקט",
     "FAILED_TO_CREATE_PROJECT": "נכשל ביצירת פרויקט חדש.",

src/reactComponents/CodeDisplay.tsx

@@ -22,6 +22,7 @@ import * as Antd from 'antd';
 import * as React from 'react';
 import { CopyOutlined as CopyIcon } from '@ant-design/icons';
 import { Prism as SyntaxHighlighter } from 'react-syntax-highlighter';
+import SiderCollapseTrigger from './SiderCollapseTrigger';
 import { dracula, oneLight } from 'react-syntax-highlighter/dist/esm/styles/prism';
 
 import type { MessageInstance } from 'antd/es/message/interface';
@@ -36,6 +37,8 @@ interface CodeDisplayProps {
   theme: string;
   messageApi: MessageInstance;
   setAlertErrorMessage: StringFunction;
+  isCollapsed?: boolean;
+  onToggleCollapse?: () => void;
 }
 
 /** Success message for copy operation. */
@@ -110,10 +113,26 @@ export default function CodeDisplay(props: CodeDisplayProps): React.JSX.Element
     </SyntaxHighlighter>
   );
 
+  /** Renders the collapse/expand trigger at the bottom center of the panel. */
+  const renderCollapseTrigger = (): React.JSX.Element | null => {
+    if (!props.onToggleCollapse) return null;
+
+    return (
+      <SiderCollapseTrigger
+        collapsed={props.isCollapsed || false}
+        onToggle={props.onToggleCollapse}
+        isRightPanel={true}
+      />
+    );
+  };
+
   return (
-    <Antd.Flex vertical gap="small" style={{ height: '100%' }}>
-      {renderHeader()}
-      {renderCodeBlock()}
-    </Antd.Flex>
+    <div style={{ height: '100%', position: 'relative' }}>
+      <Antd.Flex vertical gap="small" style={{ height: '100%' }}>
+        {renderHeader()}
+        {renderCodeBlock()}
+      </Antd.Flex>
+      {renderCollapseTrigger()}
+    </div>
   );
 }

src/reactComponents/SiderCollapseTrigger.tsx

@@ -0,0 +1,82 @@
+/**
+ * @license
+ * Copyright 2025 Porpoiseful LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/**
+ * @author [email protected] (Alan Smith)
+ */
+import * as React from 'react';
+import * as Antd from 'antd';
+import { LeftOutlined, RightOutlined } from '@ant-design/icons';
+import { useTranslation } from 'react-i18next';
+
+/** Props for the SiderCollapseTrigger component. */
+interface SiderCollapseTriggerProps {
+  collapsed: boolean;
+  onToggle: () => void;
+  isRightPanel?: boolean;
+}
+
+/**
+ * Custom collapse trigger for Sider that matches the right panel's appearance.
+ */
+export default function SiderCollapseTrigger(props: SiderCollapseTriggerProps): React.JSX.Element {
+  const { token } = Antd.theme.useToken();
+  const { t } = useTranslation();
+  const [isHovered, setIsHovered] = React.useState(false);
+
+  return (
+    <div
+      style={{
+        position: 'absolute',
+        bottom: 0,
+        left: '50%',
+        transform: 'translateX(-50%)',
+        backgroundColor: isHovered ? token.colorBgTextHover : token.colorBgContainer,
+        border: `1px solid ${token.colorBorder}`,
+        borderBottom: 'none',
+        borderRadius: '6px 6px 0 0',
+        padding: '2px 6px',
+        cursor: 'pointer',
+        display: 'flex',
+        alignItems: 'center',
+        justifyContent: 'center',
+        minWidth: '24px',
+        height: '22px',
+        color: isHovered ? token.colorText : token.colorTextSecondary,
+        transition: 'all 0.2s',
+        zIndex: 1,
+      }}
+      onClick={props.onToggle}
+      onMouseEnter={() => setIsHovered(true)}
+      onMouseLeave={() => setIsHovered(false)}
+    >
+      <Antd.Tooltip title={props.collapsed ? t("EXPAND") : t("COLLAPSE")}>
+        {props.isRightPanel ? (
+          // Right panel: reversed arrows
+          props.collapsed ? 
+            <LeftOutlined style={{ fontSize: '12px', color: 'inherit' }} /> : 
+            <RightOutlined style={{ fontSize: '12px', color: 'inherit' }} />
+        ) : (
+          // Left panel: normal arrows
+          props.collapsed ? 
+            <RightOutlined style={{ fontSize: '12px', color: 'inherit' }} /> : 
+            <LeftOutlined style={{ fontSize: '12px', color: 'inherit' }} />
+        )}
+      </Antd.Tooltip>
+    </div>
+  );
+}