Taipy extension assets

docs/userman/gui/extension/accessing_assets.md

@@ -0,0 +1,187 @@
+# Accessing the library assets
+
+In certain scenarios, you might want to enrich your user interface by displaying a small image alongside text.
+For example, when using a caption control to represent a company name along with its logo,
+adding an image can enhance visual context and usability.
+
+Traditionally, in HTML, you would use an `img` tag with the `src` attribute pointing to the image’s file path.
+However, directly referencing resources in this way can expose your application to potential security vulnerabilities,
+such as unauthorized access or malicious resource requests.
+
+To mitigate these risks, Taipy introduces the `ElementLibrary.get_resource()^` method.
+This method acts as a secure gateway for resource handling,
+allowing the application to validate and filter resource requests based on predefined settings.
+It ensures that only authorized and properly configured files are served, protecting your application while maintaining
+functionality.
+
+## Declaring element {data-source="gui:doc/extension/example_library/example_library.py#L62"}
+
+In this section, we will create a new element that displays a logo image alongside a text caption. This visual element
+will utilize the `(ElementLibrary.)get_resource()^` method to securely access the image file on the server.
+
+```python title="example_library.py"
+import base64
+
+from taipy.gui.extension import Element, ElementLibrary, ElementProperty, PropertyType
+
+
+class ExampleLibrary(ElementLibrary):
+    def __init__(self) -> None:
+        # Initialize the set of visual elements for this extension library
+        logo_path = self.get_resource("assets/logo.png")
+        with open(logo_path, "rb") as f:
+            logo_base64 = base64.b64encode(f.read()).decode("utf-8")
+
+        self.elements = {
+            "logo_with_text": Element(
+                "text",
+                {
+                    "text": ElementProperty(PropertyType.string),
+                    "logo_path": ElementProperty(PropertyType.string, default_value=logo_base64),
+                },
+            )
+        }
+```
+
+The detailed explanation of the code is as follows:
+
+- The `(ElementLibrary.)get_resource()^`
+method retrieves the absolute path to the logo image file on your local file system.
+This means the file is not accessible from the front-end.
+To make the file accessible via the web, you should use the `(ElementLibrary.)get_resource_url()^` method instead.
+- The `logo_with_text` element includes two properties: `text` and `logo_path`.
+- The `text` property has the type `PropertyType.string^`, meaning it holds a string value.
+- The `logo_path` property has the type `PropertyType.string^`, meaning it holds a string value.
+  The `default_value` parameter is set to the base64-encoded image file, which is used as the default value for the property.
+
+## Creating the React component {data-source="gui:doc/extension/example_library/front-end/src/LogoWithText.tsx"}
+```tsx title="LogoWithText.tsx"
+import React from "react";
+import { useDynamicProperty } from "taipy-gui";
+
+interface CaptionProps {
+    text: string;
+    defaultText: string;
+    logoPath: string;
+}
+
+const styles = {
+    container: {
+        display: "flex",
+        alignItems: "center",
+    },
+    logo: {
+        width: "4em",
+        height: "4em",
+        marginRight: "10px",
+    },
+};
+
+const LogoWithText = ({ text, defaultText, logoPath }: CaptionProps) => {
+    const value = useDynamicProperty(text, defaultText, "");
+
+    return (
+        <div style={styles.container}>
+            <img
+                src={`data:image/png;base64,${logoPath}`}
+                alt="LogoWithText"
+                style={styles.logo}
+            />
+            <div>{value}</div>
+        </div>
+    );
+};
+
+export default LogoWithText;
+```
+
+## Exporting the React component {data-source="gui:doc/extension/example_library/front-end/src/index.ts"}
+
+When the component is entirely defined, it must be exported by the library's JavaScript bundle.
+This is done by adding the export directive in the file *<project dir>/<package dir>front-end/src/index.ts*.
+
+```ts title="index.ts"
+import LogoWithText from "./LogoWithText";
+
+export { LogoWithText };
+```
+
+## Using the element {data-source="gui:doc/extension/logo_with_text.py"}
+
+```python title="logo_with_text.py"
+name = "Taipy"
+
+page = """
+<|{name}|logo_with_text|>
+"""
+```
+
+When you run this application, the page displays the element like this:
+<figure>
+    <img src="../logo_with_text-d.png" class="visible-dark"/>
+    <img src="../logo_with_text-l.png" class="visible-light"/>
+    <figcaption>Logo with text</figcaption>
+</figure>
+
+# Additional resources {data-source="gui:doc/extension/example_library/example_library.py#L92"}
+
+Beside the `ElementLibrary.get_resource()^` method, Taipy provides other methods to manage resources securely.
+One of them is the `ElementLibrary.get_scripts()^` method, which allows you to include JavaScript files in your application.
+This method ensures that only authorized scripts are loaded, protecting your application from potential security threats.
+
+The code snippet below illustrates how to use the `(ElementLibrary.)get_scripts()^` method to include a JavaScript file that adds animation to your application’s logo.
+This snippet should be placed within your extension library class, where you override the `(ElementLibrary.)get_scripts()^` method to return a list of script paths.
+
+```python title="example_library.py"
+    def get_scripts(self) -> list[str]:
+        return [
+            "front-end/dist/exampleLibrary.js",
+            "front-end/scripts/logoAnimation.js",
+        ]
+```
+
+## Custom Javascript file {data-source="gui:doc/extension/example_library/front-end/scripts/logoAnimation.js"}
+
+By adding this custom script to your extension library, it will be included in the application bundle.
+When the application is run, the script will be executed, adding animation to the logo image.
+
+```js title="logoAnimation.js"
+const style = document.createElement('style');
+style.innerHTML = `
+@keyframes logoAnimation {
+    from {
+        transform: scale(1);
+    }
+    to {
+        transform: scale(1.5);
+    }
+}
+
+.logo-animate {
+    animation: logoAnimation 2s infinite alternate;
+}
+`;
+document.head.appendChild(style);
+
+document.addEventListener("DOMContentLoaded", () => {
+    const checkForElement = setInterval(() => {
+        const logoImage = document.querySelector('img[alt="LogoWithText"]');
+        if (logoImage) {
+            logoImage.classList.add('logo-animate');
+            clearInterval(checkForElement);
+        }
+    }, 100);
+});
+```
+
+<figure>
+    <img src="../animation_logo_with_text-l.gif" class="visible-light" alt="Logo with Animation">
+    <img src="../animation_logo_with_text-d.gif" class="visible-dark" alt="Logo with Animation">
+    <figcaption>Logo with Animation</figcaption>
+</figure>
+
+!!! info
+    Keep in mind that there will be a delay between the page loading and the component rendering.
+    The script will execute only after the page has fully loaded and the component has been rendered.
+
+

docs/userman/gui/extension/dynamic_element/index.md

@@ -355,5 +355,5 @@ Here are the sections that address the different use cases that your custom
 element may need:
 
 - [Scalar properties](scalar_props.md)
-- [Tabular data properties](../extension_tabular_data)
+- [Tabular data properties](../tabular_data)
 

docs/userman/gui/extension/index.md

@@ -230,7 +230,7 @@ make your way from one example to the next.
 - [Custom static elements](static_element.md)
 - [Custom dynamic elements](dynamic_element/index.md)
 - [Using scalar properties](dynamic_element/scalar_props.md)
-- [Using List of Values](extension_list_of_values.md)
-- [Using tabular data](extension_tabular_data.md)
-- [Accessing assets](extension_assets.md)
+- [Using List of Values](list_of_values.md)
+- [Using tabular data](tabular_data.md)
+- [Accessing assets](accessing_assets.md)
 - [Packaging an element library](extension_packaging.md)

mkdocs.yml_template

@@ -100,8 +100,9 @@ nav:
         - "Dynamic Elements":
           - userman/gui/extension/dynamic_element/index.md
           - "Scalar properties": userman/gui/extension/dynamic_element/scalar_props.md
-        - "List of Values Elements": userman/gui/extension/extension_list_of_values.md
-        - "Tabular Elements": userman/gui/extension/extension_tabular_data.md
+        - "List of Values Elements": userman/gui/extension/list_of_values.md
+        - "Tabular Elements": userman/gui/extension/tabular_data.md
+        - "Accessing assets": userman/gui/extension/accessing_assets.md
 
     - "Scenario features":
       - "Data integration":