From c7452166e089f35f5c9babf8b1f8ef5f68ffbbdd Mon Sep 17 00:00:00 2001
From: Joscha <joscha@plugh.de>
Date: Wed, 12 Feb 2025 12:54:45 +0100
Subject: [PATCH] Implement node movement and copying

---
 gdn-app/src/components/CNote.vue            |  29 +++
 gdn-app/src/components/CNoteChildEditor.vue |   9 +-
 gdn-app/src/components/CNoteEditor.vue      |  19 +-
 gdn-app/src/stores/notes.ts                 |  23 +++
 gdn-app/src/stores/pinned.ts                | 188 ++++++++++++++++++++
 gdn-app/src/stores/ui.ts                    |   1 -
 6 files changed, 260 insertions(+), 9 deletions(-)
 create mode 100644 gdn-app/src/stores/pinned.ts

diff --git a/gdn-app/src/components/CNote.vue b/gdn-app/src/components/CNote.vue
index 434f296..ca28302 100644
--- a/gdn-app/src/components/CNote.vue
+++ b/gdn-app/src/components/CNote.vue
@@ -137,6 +137,29 @@ function onInsertEditorFinish(text: string): void {
 
   onInsertEditorClose();
 }
+
+function onInsertEditorMove(): void {
+  if (!ui.pinned) return;
+  if (insertIndex.value === undefined) return;
+
+  if (ui.pinned.parentId) {
+    notes.removeChild(ui.pinned.parentId, ui.pinned.segment);
+  }
+
+  notes.addChild(segment.id, ui.pinned.segment.id, insertIndex.value);
+
+  onInsertEditorClose();
+  ui.unsetPinned();
+}
+
+function onInsertEditorCopy(): void {
+  if (!ui.pinned) return;
+  if (insertIndex.value === undefined) return;
+
+  notes.addChild(segment.id, ui.pinned.segment.id, insertIndex.value);
+
+  onInsertEditorClose();
+}
 </script>
 
 <template>
@@ -236,8 +259,11 @@ function onInsertEditorFinish(text: string): void {
     <div v-if="open || insertIndex !== undefined" class="flex flex-col pl-2">
       <CNoteChildEditor
         v-if="insertIndex === 0"
+        :move-and-copy="ui.pinned !== undefined"
         @close="onInsertEditorClose"
         @finish="onInsertEditorFinish"
+        @move="onInsertEditorMove"
+        @copy="onInsertEditorCopy"
       />
 
       <template v-for="(child, index) of children" :key="child.fmt()">
@@ -245,8 +271,11 @@ function onInsertEditorFinish(text: string): void {
 
         <CNoteChildEditor
           v-if="insertIndex === index + 1"
+          :move-and-copy="ui.pinned !== undefined"
           @close="onInsertEditorClose"
           @finish="onInsertEditorFinish"
+          @move="onInsertEditorMove"
+          @copy="onInsertEditorCopy"
         />
       </template>
     </div>
diff --git a/gdn-app/src/components/CNoteChildEditor.vue b/gdn-app/src/components/CNoteChildEditor.vue
index f908be7..89f2c82 100644
--- a/gdn-app/src/components/CNoteChildEditor.vue
+++ b/gdn-app/src/components/CNoteChildEditor.vue
@@ -2,8 +2,12 @@
 import { RiAddLine } from "@remixicon/vue";
 import CNoteEditor from "./CNoteEditor.vue";
 
+const { moveAndCopy = false } = defineProps<{
+  moveAndCopy?: boolean;
+}>();
+
 const emit = defineEmits<{
-  (e: "close"): void;
+  (e: "close" | "move" | "copy"): void;
   (e: "finish", text: string): void;
 }>();
 </script>
@@ -16,8 +20,11 @@ const emit = defineEmits<{
 
     <CNoteEditor
       class="flex-1"
+      :move-and-copy
       @close="() => emit('close')"
       @finish="(text) => emit('finish', text)"
+      @move="() => emit('move')"
+      @copy="() => emit('copy')"
     />
   </div>
 </template>
diff --git a/gdn-app/src/components/CNoteEditor.vue b/gdn-app/src/components/CNoteEditor.vue
index 908504a..8974f77 100644
--- a/gdn-app/src/components/CNoteEditor.vue
+++ b/gdn-app/src/components/CNoteEditor.vue
@@ -1,14 +1,15 @@
 <script setup lang="ts">
-import { RiCheckLine, RiCloseLine } from "@remixicon/vue";
+import { RiCheckLine, RiCloseLine, RiFileCopyLine, RiFileTransferLine } from "@remixicon/vue";
 import { onMounted, ref, useTemplateRef } from "vue";
 import CNoteButton from "./CNoteButton.vue";
 
-const { initialText = "" } = defineProps<{
+const { initialText = "", moveAndCopy = false } = defineProps<{
   initialText?: string;
+  moveAndCopy?: boolean;
 }>();
 
 const emit = defineEmits<{
-  (e: "close"): void;
+  (e: "close" | "move" | "copy"): void;
   (e: "finish", text: string): void;
 }>();
 
@@ -56,13 +57,17 @@ function onKeyPress(ev: KeyboardEvent): void {
       @click.stop
     ></textarea>
 
-    <div class="flex h-6 items-center">
+    <div class="flex h-6 items-center gap-0.5">
+      <CNoteButton v-if="moveAndCopy">
+        <RiFileTransferLine size="16px" @click.stop="emit('move')" />
+      </CNoteButton>
+      <CNoteButton v-if="moveAndCopy">
+        <RiFileCopyLine size="16px" @click.stop="emit('copy')" />
+      </CNoteButton>
+      <div v-if="moveAndCopy" class="w-0.5"></div>
       <CNoteButton @click.stop="emit('finish', text)">
         <RiCheckLine size="16px" />
       </CNoteButton>
-    </div>
-
-    <div class="flex h-6 items-center">
       <CNoteButton @click.stop="emit('close')">
         <RiCloseLine size="16px" />
       </CNoteButton>
diff --git a/gdn-app/src/stores/notes.ts b/gdn-app/src/stores/notes.ts
index 8896393..6257853 100644
--- a/gdn-app/src/stores/notes.ts
+++ b/gdn-app/src/stores/notes.ts
@@ -1,3 +1,4 @@
+import { Segment } from "@/lib/path";
 import { defineStore } from "pinia";
 import { computed, ref } from "vue";
 
@@ -41,10 +42,32 @@ export const useNotesStore = defineStore("notes", () => {
     notes.value.clear();
   }
 
+  function addChild(id: string, childId: string, index: number): void {
+    const note = getNote(id);
+    if (!note) return;
+
+    note.children.splice(index, 0, childId);
+  }
+
+  function removeChild(id: string, segment: Segment): void {
+    const note = getNote(id);
+    if (!note) return;
+
+    let index = note.children.indexOf(segment.id);
+    for (let i = 0; i < segment.iteration; i++) {
+      index = note.children.indexOf(segment.id, index + 1);
+    }
+
+    if (index < 0) return;
+    note.children.splice(index, 1);
+  }
+
   return {
     getNote,
     getParents,
     createNote,
     clearNotes,
+    addChild,
+    removeChild,
   };
 });
diff --git a/gdn-app/src/stores/pinned.ts b/gdn-app/src/stores/pinned.ts
new file mode 100644
index 0000000..865728e
--- /dev/null
+++ b/gdn-app/src/stores/pinned.ts
@@ -0,0 +1,188 @@
+import { Segment, Path as UiPath } from "@/lib/path";
+import { defineStore } from "pinia";
+import { ref, watchEffect } from "vue";
+
+interface HistoryEntry {
+  anchorId: string;
+  focusPath: UiPath;
+  openPaths: Set<string>;
+}
+
+type Mode =
+  | { type: "focus" }
+  | { type: "edit"; path: UiPath }
+  | { type: "insert"; path: UiPath; index: number };
+
+export const usePinnedStore = defineStore("pinned", () => {
+  const history = ref<HistoryEntry[]>([]);
+
+  // Managed by history
+  const anchorId = ref<string>();
+  const focusPath = ref<UiPath>(new UiPath());
+  const openPaths = ref<Set<string>>(new Set());
+
+  const mode = ref<Mode>({ type: "focus" });
+  const pinned = ref<{ segment: Segment; parentId?: string }>();
+
+  // Ensure the currently focused note is visible.
+  watchEffect(() => {
+    if (mode.value.type === "insert") {
+      for (const ancestor of mode.value.path.ancestors()) {
+        setOpen(ancestor, true);
+      }
+    } else {
+      // The node pointed to by the path itself doesn't need to be unfolded.
+      for (const ancestor of focusPath.value.ancestors().slice(1)) {
+        setOpen(ancestor, true);
+      }
+    }
+  });
+
+  ///////////////////////////////////
+  // History and anchor management //
+  ///////////////////////////////////
+
+  function pushAnchorId(id: string): void {
+    if (anchorId.value) {
+      history.value.push({
+        anchorId: anchorId.value,
+        focusPath: focusPath.value,
+        openPaths: openPaths.value,
+      });
+    }
+
+    anchorId.value = id;
+    focusPath.value = new UiPath();
+    openPaths.value = new Set();
+
+    mode.value = { type: "focus" };
+  }
+
+  function popAnchorId(): void {
+    // Temporary solution until I implement some UI for anchorId===undefined
+    if (history.value.length === 0) return;
+
+    const entry = history.value.pop();
+    if (entry) {
+      anchorId.value = entry.anchorId;
+      focusPath.value = entry.focusPath;
+      openPaths.value = entry.openPaths;
+    } else {
+      anchorId.value = undefined;
+      focusPath.value = new UiPath();
+      openPaths.value = new Set();
+    }
+
+    mode.value = { type: "focus" };
+  }
+
+  ///////////////////////////////
+  // Mode and focus management //
+  ///////////////////////////////
+
+  function isFocused(path: UiPath): boolean {
+    return mode.value.type === "focus" && focusPath.value.eq(path);
+  }
+
+  function isEditing(path: UiPath): boolean {
+    return mode.value.type === "edit" && mode.value.path.eq(path);
+  }
+
+  function getInsertIndex(path: UiPath): number | undefined {
+    if (mode.value.type !== "insert") return;
+    if (!mode.value.path.eq(path)) return;
+    if (mode.value.index < 0) return;
+    return mode.value.index;
+  }
+
+  function focus(): void {
+    mode.value = { type: "focus" };
+  }
+
+  function focusOn(path: UiPath): void {
+    focus();
+    focusPath.value = path;
+  }
+
+  function edit(path: UiPath): void {
+    mode.value = { type: "edit", path };
+  }
+
+  function insertAt(path: UiPath, index: number): void {
+    mode.value = { type: "insert", path, index };
+  }
+
+  //////////////////
+  // Node folding //
+  //////////////////
+
+  function isOpen(path: UiPath): boolean {
+    return openPaths.value.has(path.fmt());
+  }
+
+  function setOpen(path: UiPath, value: boolean): void {
+    // Don't update openPaths unnecessarily.
+    // Just in case vue itself doesn't debounce Set operations.
+    if (value && !isOpen(path)) {
+      openPaths.value.add(path.fmt());
+    } else if (!value && isOpen(path)) {
+      // Move the focusPath if necessary
+      if (path.isPrefixOf(focusPath.value)) focusPath.value = path;
+
+      openPaths.value.delete(path.fmt());
+    }
+  }
+
+  function toggleOpen(path: UiPath): void {
+    setOpen(path, !isOpen(path));
+  }
+
+  /////////////
+  // Pinning //
+  /////////////
+
+  function isPinned(segment: Segment, parentId?: string): boolean {
+    if (!pinned.value) return false;
+    return pinned.value.segment.eq(segment) && pinned.value.parentId === parentId;
+  }
+
+  function setPinned(segment: Segment, parentId?: string): void {
+    pinned.value = { segment, parentId };
+  }
+
+  function unsetPinned(): void {
+    pinned.value = undefined;
+  }
+
+  return {
+    history,
+    anchorId,
+    focusPath,
+    openPaths,
+    mode,
+    pinned,
+
+    // History and anchor management
+    pushAnchorId,
+    popAnchorId,
+
+    // Mode and focus management
+    isFocused,
+    isEditing,
+    getInsertIndex,
+    focus,
+    focusOn,
+    edit,
+    insertAt,
+
+    // Node folding
+    isOpen,
+    setOpen,
+    toggleOpen,
+
+    // Pinning
+    isPinned,
+    setPinned,
+    unsetPinned,
+  };
+});
diff --git a/gdn-app/src/stores/ui.ts b/gdn-app/src/stores/ui.ts
index 338d6f4..0d31f68 100644
--- a/gdn-app/src/stores/ui.ts
+++ b/gdn-app/src/stores/ui.ts
@@ -91,7 +91,6 @@ export const useUiStore = defineStore("ui", () => {
   function getInsertIndex(path: UiPath): number | undefined {
     if (mode.value.type !== "insert") return;
     if (!mode.value.path.eq(path)) return;
-    if (mode.value.index < 0) return;
     return mode.value.index;
   }