From f36c9e8d52b08253041392b0be9845422adca005 Mon Sep 17 00:00:00 2001
From: Jake Mannens <jake@asger.xyz>
Date: Thu, 7 Sep 2023 09:34:07 +1000
Subject: Improved dialog styling and made dialogs draggable

---
 Pages/Component/Dialog.razor     | 55 ++++++++++----------------------
 Pages/Component/Dialog.razor.css | 24 ++++++++++++--
 Pages/_Host.cshtml               |  1 +
 Program.cs                       |  1 -
 Services/DialogService.cs        | 39 -----------------------
 wwwroot/js/dialog.js             | 68 ++++++++++++++++++++++++++++++++++++++++
 6 files changed, 108 insertions(+), 80 deletions(-)
 delete mode 100644 Services/DialogService.cs
 create mode 100644 wwwroot/js/dialog.js

diff --git a/Pages/Component/Dialog.razor b/Pages/Component/Dialog.razor
index e71ddc6..dbfec49 100644
--- a/Pages/Component/Dialog.razor
+++ b/Pages/Component/Dialog.razor
@@ -1,13 +1,20 @@
-@inject IDialogService dialogService
+@inject IJSRuntime jsRuntime
 @implements IDialog
-@implements IDisposable
 
-<div @onclick=Bump style="@(style)">
+<div
+    class="dialog"
+    onmousedown="dialogMouseDown(event)"
+    style="opacity:0;visibility:hidden;@(heightStyle)"
+    @ref=dialogDiv>
     @if(Title is not null) {
-        <p>@Title</p>
-        <hr/>
+        <div class="titlebar" onmousedown="dialogTitleMouseDown(event)">
+            <p class="title">@Title</p>
+            <hr/>
+        </div>
     }
-    @ChildContent
+    <div class="content">
+        @ChildContent
+    </div>
 </div>
 
 @code {
@@ -26,49 +33,21 @@
         get => visible;
         set {
             visible = value;
-            if(value)
-                Bump();
-            StateHasChanged();
-        }
-    }
-
-    public int? ZIndex {
-        get => zIndex;
-        set {
-            zIndex = value;
-            StateHasChanged();
+            jsRuntime.InvokeVoidAsync(
+                "setDialogVisibility",
+                new object?[] { dialogDiv, value });
         }
     }
 
     private bool visible = false;
 
-    private int? zIndex;
-
     private string? height;
 
-    protected override void OnInitialized() =>
-       dialogService.Register(this);
+    private ElementReference dialogDiv;
 
     public void Show() => Visible = true;
     public void Hide() => Visible = false;
 
-    private void Bump() =>
-        dialogService.BumpZIndex(this);
-
-    private string style =>
-        zIndexStyle +
-        heightStyle +
-        visiblilityStyle;
-
-    private string zIndexStyle =>
-        zIndex is null ? "display:none;" : $"z-index:{zIndex};";
-
     private string heightStyle =>
         $"{(height is null ? "" : $"max-height:{height};")}";
-
-    private string visiblilityStyle =>
-        Visible ? "opacity:1;visibility:visible;" : "opacity:0;visibility:hidden;";
-
-    public void Dispose() =>
-        dialogService.Unregister(this);
 }
diff --git a/Pages/Component/Dialog.razor.css b/Pages/Component/Dialog.razor.css
index dea3d8d..1447407 100644
--- a/Pages/Component/Dialog.razor.css
+++ b/Pages/Component/Dialog.razor.css
@@ -1,11 +1,11 @@
-div {
+div.dialog {
     background:     var(--col-dialog-bg);
     border-radius:  20px;
     box-shadow:     0px 5px 10px 10px rgb(0 0 0 / 25%);
     display:        flex;
     flex-direction: column;
     left:           50%;
-    padding:        20px;
+    padding:        0;
     position:       absolute;
     top:            50%;
     transform:      translate(-50%, -50%);
@@ -13,3 +13,23 @@
     width:          450px;
     z-index:        1000;
 }
+
+hr {
+    margin: 0;
+}
+
+div.titlebar {
+    cursor: grab;
+}
+
+div.titlebar p.title {
+    font-size: 10pt;
+    margin:    0;
+    padding:   10px 20px 10px 20px;
+}
+
+div.content {
+    display:        flex;
+    flex-direction: column;
+    padding:        20px;
+}
diff --git a/Pages/_Host.cshtml b/Pages/_Host.cshtml
index e01b94d..177e2df 100644
--- a/Pages/_Host.cshtml
+++ b/Pages/_Host.cshtml
@@ -12,6 +12,7 @@
     <link href="/styles/global.css" rel="stylesheet" />
     <link href="/favicon.ico" rel="icon" />
     <link href="/manifest.webmanifest" rel="manifest" />
+    <script type="text/javascript" src="/js/dialog.js"></script>
     <component type="typeof(HeadOutlet)" render-mode="ServerPrerendered" />
 </head>
 <body>
diff --git a/Program.cs b/Program.cs
index 494a808..564ab30 100644
--- a/Program.cs
+++ b/Program.cs
@@ -21,7 +21,6 @@ public class Program {
         builder.Services.AddScoped<ITagService, TagService>();
         builder.Services.AddScoped<IMediaService, MediaService>();
         builder.Services.AddSingleton<IUserService, UserService>();
-        builder.Services.AddScoped<IDialogService, DialogService>();
         builder.Services.AddHostedService<OcrService>();
 
         var app = builder.Build();
diff --git a/Services/DialogService.cs b/Services/DialogService.cs
deleted file mode 100644
index 5967d95..0000000
--- a/Services/DialogService.cs
+++ /dev/null
@@ -1,39 +0,0 @@
-using HyperBooru.Pages.Component;
-
-namespace HyperBooru.Services;
-
-public interface IDialogService {
-    public void Register(Dialog dialog);
-    public void Unregister(Dialog dialog);
-    public void BumpZIndex(Dialog dialog);
-}
-
-public class DialogService : IDialogService {
-    private const int MinZLevel = 900;
-
-    private List<Dialog> dialogs = new();
-
-    public void Register(Dialog dialog) {
-        if(!dialogs.Contains(dialog))
-            dialogs.Add(dialog);
-
-        dialog.ZIndex = dialogs.Count() - 1 + MinZLevel;
-    }
-
-    public void Unregister(Dialog dialog) {
-        dialogs.Remove(dialog);
-        for(int i = 0; i < dialogs.Count(); i++)
-            dialogs[i].ZIndex = i + MinZLevel;
-    }
-
-    public void BumpZIndex(Dialog dialog) {
-        if(!dialogs.Contains(dialog))
-            return;
-
-        dialogs.Remove(dialog);
-        dialogs.Add(dialog);
-
-        for(int i = 0; i < dialogs.Count(); i++)
-            dialogs[i].ZIndex = i + MinZLevel;
-    }
-}
\ No newline at end of file
diff --git a/wwwroot/js/dialog.js b/wwwroot/js/dialog.js
new file mode 100644
index 0000000..065014a
--- /dev/null
+++ b/wwwroot/js/dialog.js
@@ -0,0 +1,68 @@
+function dialogMouseDown(e) {
+    bumpDialog(e.currentTarget);
+}
+
+function dialogTitleMouseDown(e) {
+    e = e || window.event;
+    e.preventDefault();
+    var element = e.currentTarget.parentElement;
+    var ds = element.dataset;
+    ds.lastX  = e.clientX;
+    ds.lastY  = e.clientY;
+
+    window.dragDialog    = element;
+    document.onmouseup   = dragMouseUp;
+    document.onmousemove = dragMouseMove;
+}
+
+function dragMouseUp() {
+    window.dragDialog    = null;
+    document.onmouseup   = null;
+    document.onmousemove = null;
+}
+
+function dragMouseMove(e) {
+    e = e || window.event;
+    e.preventDefault();
+    var element = window.dragDialog;
+    var ds = element.dataset;
+    deltaX = ds.lastX - e.clientX;
+    deltaY = ds.lastY - e.clientY;
+    ds.lastX = e.clientX;
+    ds.lastY = e.clientY;
+    element.style.left = (element.offsetLeft - deltaX) + 'px';
+    element.style.top  = (element.offsetTop  - deltaY) + 'px';
+}
+
+function setDialogVisibility(element, visible) {
+    if(visible) {
+        element.style.left       = null;
+        element.style.top        = null;
+        element.style.opacity    = 1;
+        element.style.visibility = 'visible';
+        bumpDialog(element);
+
+        var input = element.querySelector('input[type="text"]');
+        if(input) {
+            setTimeout(() => input.focus(), 100);
+        }
+    } else {
+        element.style.opacity    = 0;
+        element.style.visibility = 'hidden';
+    }
+}
+
+function bumpDialog(element) {
+    var dialogs = Array
+        .from(document.querySelectorAll('div.dialog'))
+        .map(e => ({ zIndex: parseInt(e.style.zIndex), element: e }))
+        .sort((a, b) => a.zIndex - b.zIndex)
+        .map(d => d.element)
+        .filter(e => e != element);
+
+    dialogs.push(element);
+
+    var z = 900;
+    for(var d of dialogs)
+        d.style.zIndex = z++;
+}
-- 
cgit v1.3