feat(Watermark): add Watermark component

src/BootstrapBlazor.Server/Components/Samples/Watermarks.razor

@@ -0,0 +1,50 @@
+@page "/watermark"
+@inject IStringLocalizer<Watermarks> Localizer
+
+<h3>@Localizer["WatermarkTitle"]</h3>
+
+<h4>@Localizer["Watermarkntro"]</h4>
+
+<DemoBlock Title="@Localizer["WatermarkNormalTitle"]" Introduction="@Localizer["WatermarkNormalIntro"]" Name="Normal">
+    <section ignore>
+        <div class="row form-inline g-3">
+            <div class="col-12 col-sm-6">
+                <BootstrapInputGroup>
+                    <BootstrapInputGroupLabel DisplayText="Text"></BootstrapInputGroupLabel>
+                    <BootstrapInput @bind-Value="@_text"></BootstrapInput>
+                </BootstrapInputGroup>
+            </div>
+            <div class="col-12 col-sm-6">
+                <BootstrapInputGroup>
+                    <BootstrapInputGroupLabel DisplayText="FontSize"></BootstrapInputGroupLabel>
+                    <Slider @bind-Value="@_fontSize" Min="12" Max="20"></Slider>
+                </BootstrapInputGroup>
+            </div>
+            <div class="col-12 col-sm-6">
+                <BootstrapInputGroup>
+                    <BootstrapInputGroupLabel DisplayText="Color"></BootstrapInputGroupLabel>
+                    <ColorPicker @bind-Value="@_color" IsSupportOpacity="true"></ColorPicker>
+                </BootstrapInputGroup>
+            </div>
+            <div class="col-12 col-sm-6">
+                <BootstrapInputGroup>
+                    <BootstrapInputGroupLabel DisplayText="Rotate"></BootstrapInputGroupLabel>
+                    <Slider @bind-Value="@_rotate" Min="-180" Max="180"></Slider>
+                </BootstrapInputGroup>
+            </div>
+            <div class="col-12 col-sm-6">
+                <BootstrapInputGroup>
+                    <BootstrapInputGroupLabel DisplayText="Gap"></BootstrapInputGroupLabel>
+                    <Slider @bind-Value="@_gap" Min="0" Max="100"></Slider>
+                </BootstrapInputGroup>
+            </div>
+        </div>
+    </section>
+    <Watermark Text="@_text" FontSize="@_fontSize" Color="@_color" Rotate="@_rotate"
+               Gap="@_gap">
+        <div style="height: 500px; padding-top: 40px; text-align: center;">
+            <p>this is a watermark demo</p>
+            <div>这是 watermark 演示</div>
+        </div>
+    </Watermark>
+</DemoBlock>

src/BootstrapBlazor.Server/Components/Samples/Watermarks.razor.cs

@@ -0,0 +1,22 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the Apache 2.0 License
+// See the LICENSE file in the project root for more information.
+// Maintainer: Argo Zhang([email protected]) Website: https://www.blazor.zone
+
+namespace BootstrapBlazor.Server.Components.Samples;
+
+/// <summary>
+/// Watermarks 组件
+/// </summary>
+public partial class Watermarks
+{
+    private string _text = "BootstrapBlazor";
+
+    private int _fontSize = 16;
+
+    private int _gap = 40;
+
+    private int _rotate = -40;
+
+    private string _color = "#0000004d";
+}

src/BootstrapBlazor.Server/Extensions/MenusLocalizerExtensions.cs

@@ -774,6 +774,12 @@ void AddData(DemoMenuItem item)
                 {
                     Text = Localizer["Waterfall"],
                     Url = "tutorials/waterfall"
+                },
+                new()
+                {
+                    IsNew = true,
+                    Text = Localizer["Watermark"],
+                    Url = "watermark"
                 }
             };
             AddBadge(item);

src/BootstrapBlazor.Server/Locales/en-US.json

@@ -4787,7 +4787,8 @@
     "Player": "Player",
     "RDKit": "RDKit",
     "SmilesDrawer": "SmilesDrawer",
-    "Affix": "Affix"
+    "Affix": "Affix",
+    "Watermark": "Watermark"
   },
   "BootstrapBlazor.Server.Components.Samples.Table.TablesHeader": {
     "TablesHeaderTitle": "Header grouping function",
@@ -6878,5 +6879,11 @@
     "AffixPositionTitle": "Position",
     "AffixPositionIntro": "Use the parameter <code>Position</code> to control whether the top or bottom is fixed",
     "AffixOffsetDesc": "The parameter <code>Position</code> controls whether the top or bottom is fixed, and the <code>Offset</code> value sets the offset to the top or bottom"
+  },
+  "BootstrapBlazor.Server.Components.Samples.Watermarks": {
+    "WatermarkTitle": "Watermark",
+    "Watermarkntro": "Add specific text or patterns to the page",
+    "WatermarkNormalTitle": "Basic usage",
+    "WatermarkNormalIntro": "Use the <code>Text</code> property to set a string to specify the watermark text"
   }
 }

src/BootstrapBlazor.Server/Locales/zh-CN.json

@@ -4787,7 +4787,8 @@
     "Player": "播放器 Player",
     "RDKit": "分子式组件 RDKit",
     "SmilesDrawer": "分子式组件 SmilesDrawer",
-    "Affix": "固钉组件 Affix"
+    "Affix": "固钉组件 Affix",
+    "Watermark": "水印组件 Watermark"
   },
   "BootstrapBlazor.Server.Components.Samples.Table.TablesHeader": {
     "TablesHeaderTitle": "表头分组功能",
@@ -6877,5 +6878,11 @@
     "AffixNormalIntro": "固钉默认固定在页面顶部",
     "AffixPositionTitle": "位置与距离",
     "AffixPositionIntro": "通过参数 <code>Position</code> 控制固定顶端还是底端，通过 <code>Offset</code> 值设置到顶端或者底端距离偏移量"
+  },
+  "BootstrapBlazor.Server.Components.Samples.Watermarks": {
+    "WatermarkTitle": "Watermark 水印组件",
+    "Watermarkntro": "在页面上添加文本或图片等水印信息",
+    "WatermarkNormalTitle": "基础用法",
+    "WatermarkNormalIntro": "使用 <code>Text</code> 属性设置一个字符串指定水印内容"
   }
 }

src/BootstrapBlazor.Server/docs.json

@@ -223,7 +223,8 @@
     "player": "Players",
     "rdkit": "Rdkits",
     "smiles-drawer": "SmilesDrawers",
-    "affix": "Affixs"
+    "affix": "Affixs",
+    "watermark": "Watermarks"
   },
   "video": {
     "table": "BV1ap4y1x7Qn?p=1",

src/BootstrapBlazor/BootstrapBlazor.csproj

@@ -1,7 +1,7 @@
-<Project Sdk="Microsoft.NET.Sdk.Razor">
+<Project Sdk="Microsoft.NET.Sdk.Razor">
 
   <PropertyGroup>
-    <Version>9.2.7-beta05</Version>
+    <Version>9.2.7</Version>
   </PropertyGroup>
 
   <ItemGroup>

src/BootstrapBlazor/Components/Watermark/Watermark.razor

@@ -0,0 +1,7 @@
+@namespace BootstrapBlazor.Components
+@inherits BootstrapModuleComponentBase
+@attribute [BootstrapModuleAutoLoader]
+
+<div @attributes="AdditionalAttributes" id="@Id" class="@ClassString">
+    @ChildContent
+</div>

src/BootstrapBlazor/Components/Watermark/Watermark.razor.cs

@@ -0,0 +1,100 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the Apache 2.0 License
+// See the LICENSE file in the project root for more information.
+// Maintainer: Argo Zhang([email protected]) Website: https://www.blazor.zone
+
+namespace BootstrapBlazor.Components;
+
+/// <summary>
+/// Watermark 组件
+/// </summary>
+public partial class Watermark
+{
+    /// <summary>
+    /// 获得/设置 组件内容
+    /// </summary>
+    [Parameter]
+    [EditorRequired]
+    public RenderFragment? ChildContent { get; set; }
+
+    /// <summary>
+    /// 获得/设置 水印文本 默认 BootstrapBlazor
+    /// </summary>
+    [Parameter]
+    public string? Text { get; set; }
+
+    /// <summary>
+    /// 获得/设置 字体大小 默认 null 未设置 默认使用 16px 字体大小 单位 px
+    /// </summary>
+    [Parameter]
+    public int? FontSize { get; set; }
+
+    /// <summary>
+    /// 获得/设置 颜色 默认 null 未设置
+    /// </summary>
+    [Parameter]
+    public string? Color { get; set; }
+
+    /// <summary>
+    /// 获得/设置 水印的旋转角度 默认 null 45°
+    /// </summary>
+    [Parameter]
+    public int? Rotate { get; set; }
+
+    /// <summary>
+    /// 获得/设置 水印元素的 z-index 值 默认 null
+    /// </summary>
+    [Parameter]
+    public int? ZIndex { get; set; }
+
+    /// <summary>
+    /// 获得/设置 水印之间的间距 值 默认 null
+    /// </summary>
+    [Parameter]
+    public int? Gap { get; set; }
+
+    private string? ClassString => CssBuilder.Default("bb-watermark")
+        .AddClassFromAttributes(AdditionalAttributes)
+        .Build();
+
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
+    protected override void OnParametersSet()
+    {
+        base.OnParametersSet();
+
+        Text ??= "BootstrapBlazor";
+    }
+
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
+    /// <param name="firstRender"></param>
+    /// <returns></returns>
+    protected override async Task OnAfterRenderAsync(bool firstRender)
+    {
+        await base.OnAfterRenderAsync(firstRender);
+
+        if (!firstRender)
+        {
+            await InvokeVoidAsync("update", Id, GetOptions());
+        }
+    }
+
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
+    /// <returns></returns>
+    protected override Task InvokeInitAsync() => InvokeVoidAsync("init", Id, GetOptions());
+
+    private object GetOptions() => new
+    {
+        Text,
+        FontSize,
+        Color,
+        Rotate,
+        Gap,
+        ZIndex
+    };
+}

src/BootstrapBlazor/Components/Watermark/Watermark.razor.js

@@ -0,0 +1,130 @@
+import Data from "../../modules/data.js"
+
+export function init(id, options) {
+    const el = document.getElementById(id);
+    if (el === null) {
+        return;
+    }
+    const watermark = { el, options };
+    createWatermark(watermark);
+
+    const observer = ob => {
+        ob.observe(el, {
+            childList: true,
+            attributes: true,
+            subtree: true
+        });
+    }
+
+    const observerCallback = records => {
+        ob.disconnect();
+        updateWatermark(records, watermark);
+        observer(ob);
+    };
+
+    const ob = new MutationObserver(observerCallback);
+    observer(ob);
+    watermark.ob = ob;
+
+    Data.set(id, watermark);
+}
+
+export function update(id, options) {
+    const watermark = Data.get(id);
+    watermark.options = options;
+
+    createWatermark(watermark);
+}
+
+export function dispose(id) {
+    const watermark = Data.get(id);
+    Data.remove(id);
+
+    if (watermark) {
+        const { ob } = watermark;
+        ob.disconnect();
+
+        delete watermark.ob;
+    }
+}
+
+const updateWatermark = (records, watermark) => {
+    for (const record of records) {
+        for (const dom of record.removedNodes) {
+            if (dom.classList.contains('bb-watermark-bg')) {
+                createWatermark(watermark);
+                return;
+            }
+        }
+
+        if (record.target.classList.contains('bb-watermark-bg')) {
+            createWatermark(watermark);
+            return;
+        }
+    }
+}
+
+const createWatermark = watermark => {
+    const { el, options } = watermark;
+    const defaults = {
+        gap: 40,
+        fontSize: 16,
+        text: 'BootstrapBlazor',
+        rotate: -40,
+        color: '#0000004d'
+    };
+
+    for (const key in options) {
+        if (options[key] === void 0 || options[key] === null) {
+            delete options[key];
+        }
+    }
+
+    const bg = getWatermark({ ...defaults, ...options });
+    const div = document.createElement('div');
+    const { base64, styleSize } = bg;
+    div.style.backgroundImage = `url(${base64})`;
+    div.style.backgroundSize = `${styleSize}px ${styleSize}px`;
+    div.style.backgroundRepeat = 'repeat';
+    div.style.pointerEvents = 'none';
+    div.style.opacity = '1';
+    div.style.position = 'absolute';
+    div.style.inset = '0';
+    div.style.zIndex = '999';
+    div.classList.add("bb-watermark-bg");
+
+    const mark = el.querySelector('.bb-watermark-bg');
+    if (mark) {
+        mark.remove();
+    }
+    el.appendChild(div);
+}
+
+const getWatermark = props => {
+    const canvas = document.createElement('canvas');
+    const devicePixelRatio = window.devicePixelRatio || 1;
+
+    const fontSize = props.fontSize * devicePixelRatio;
+    const font = fontSize + 'px serif';
+    const ctx = canvas.getContext('2d');
+
+    ctx.font = font;
+    const { width } = ctx.measureText(props.text);
+    const canvasSize = Math.max(100, width) + props.gap * devicePixelRatio;
+    canvas.width = canvasSize;
+    canvas.height = canvasSize;
+    ctx.translate(canvas.width / 2, canvas.height / 2);
+
+    ctx.rotate((Math.PI / 180) * props.rotate);
+    ctx.fillStyle = props.color;
+    ctx.font = font;
+    ctx.textAlign = 'center';
+    ctx.textBaseline = 'middle';
+
+    ctx.fillText(props.text, 0, 0);
+    return {
+        base64: canvas.toDataURL(),
+        size: canvasSize,
+        styleSize: canvasSize / devicePixelRatio,
+    };
+}

src/BootstrapBlazor/Components/Watermark/Watermark.razor.scss

@@ -0,0 +1,3 @@
+.bb-watermark {
+    position: relative;
+}