✨ Add text editor v2 integration tests

frontend/playwright/data/text-editor/get-file-blank.json

@@ -0,0 +1,58 @@
+{
+  "~:features": {
+    "~#set": [
+      "layout/grid",
+      "styles/v2",
+      "fdata/pointer-map",
+      "fdata/objects-map",
+      "components/v2",
+      "fdata/shape-data-type"
+    ]
+  },
+  "~:permissions": {
+    "~:type": "~:membership",
+    "~:is-owner": true,
+    "~:is-admin": true,
+    "~:can-edit": true,
+    "~:can-read": true,
+    "~:is-logged": true
+  },
+  "~:has-media-trimmed": false,
+  "~:comment-thread-seqn": 0,
+  "~:name": "New File 1",
+  "~:revn": 11,
+  "~:modified-at": "~m1713873823633",
+  "~:id": "~uc7ce0794-0992-8105-8004-38f280443849",
+  "~:is-shared": false,
+  "~:version": 46,
+  "~:project-id": "~uc7ce0794-0992-8105-8004-38e630f7920b",
+  "~:created-at": "~m1713536343369",
+  "~:data": {
+    "~:pages": [
+      "~u66697432-c33d-8055-8006-2c62cc084cad"
+    ],
+    "~:pages-index": {
+      "~u66697432-c33d-8055-8006-2c62cc084cad": {
+        "~#penpot/pointer": [
+          "~ude58c8f6-c5c2-8196-8004-3df9e2e52d88",
+          {
+            "~:created-at": "~m1713873823636"
+          }
+        ]
+      }
+    },
+    "~:id": "~uc7ce0794-0992-8105-8004-38f280443849",
+    "~:options": {
+      "~:components-v2": true
+    },
+    "~:recent-colors": [
+      {
+        "~:color": "#0000ff",
+        "~:opacity": 1,
+        "~:id": null,
+        "~:file-id": null,
+        "~:image": null
+      }
+    ]
+  }
+}

frontend/playwright/data/text-editor/get-file-lorem-ipsum.json

@@ -0,0 +1,345 @@
+{
+  "~:features": {
+    "~#set": [
+      "fdata/path-data",
+      "plugins/runtime",
+      "design-tokens/v1",
+      "layout/grid",
+      "styles/v2",
+      "fdata/pointer-map",
+      "fdata/objects-map",
+      "components/v2",
+      "fdata/shape-data-type",
+      "text-editor/v2"
+    ]
+  },
+  "~:team-id": "~u9e6e22b2-db76-81d6-8006-75d7cdbb8bad",
+  "~:permissions": {
+    "~:type": "~:membership",
+    "~:is-owner": true,
+    "~:is-admin": true,
+    "~:can-edit": true,
+    "~:can-read": true,
+    "~:is-logged": true
+  },
+  "~:has-media-trimmed": false,
+  "~:comment-thread-seqn": 0,
+  "~:name": "Bug 11552",
+  "~:revn": 3,
+  "~:modified-at": "~m1753957736516",
+  "~:vern": 0,
+  "~:id": "~u238a17e0-75ff-8075-8006-934586ea2230",
+  "~:is-shared": false,
+  "~:migrations": {
+    "~#ordered-set": [
+      "legacy-2",
+      "legacy-3",
+      "legacy-5",
+      "legacy-6",
+      "legacy-7",
+      "legacy-8",
+      "legacy-9",
+      "legacy-10",
+      "legacy-11",
+      "legacy-12",
+      "legacy-13",
+      "legacy-14",
+      "legacy-16",
+      "legacy-17",
+      "legacy-18",
+      "legacy-19",
+      "legacy-25",
+      "legacy-26",
+      "legacy-27",
+      "legacy-28",
+      "legacy-29",
+      "legacy-31",
+      "legacy-32",
+      "legacy-33",
+      "legacy-34",
+      "legacy-36",
+      "legacy-37",
+      "legacy-38",
+      "legacy-39",
+      "legacy-40",
+      "legacy-41",
+      "legacy-42",
+      "legacy-43",
+      "legacy-44",
+      "legacy-45",
+      "legacy-46",
+      "legacy-47",
+      "legacy-48",
+      "legacy-49",
+      "legacy-50",
+      "legacy-51",
+      "legacy-52",
+      "legacy-53",
+      "legacy-54",
+      "legacy-55",
+      "legacy-56",
+      "legacy-57",
+      "legacy-59",
+      "legacy-62",
+      "legacy-65",
+      "legacy-66",
+      "legacy-67",
+      "0001-remove-tokens-from-groups",
+      "0002-normalize-bool-content-v2",
+      "0002-clean-shape-interactions",
+      "0003-fix-root-shape",
+      "0003-convert-path-content-v2",
+      "0004-clean-shadow-color",
+      "0005-deprecate-image-type",
+      "0006-fix-old-texts-fills",
+      "0007-clear-invalid-strokes-and-fills-v2",
+      "0008-fix-library-colors-v4",
+      "0009-clean-library-colors",
+      "0009-add-partial-text-touched-flags"
+    ]
+  },
+  "~:version": 67,
+  "~:project-id": "~u9e6e22b2-db76-81d6-8006-75d7cdc30669",
+  "~:created-at": "~m1753957644225",
+  "~:data": {
+    "~:pages": ["~u238a17e0-75ff-8075-8006-934586ea2231"],
+    "~:pages-index": {
+      "~u238a17e0-75ff-8075-8006-934586ea2231": {
+        "~:objects": {
+          "~u00000000-0000-0000-0000-000000000000": {
+            "~#shape": {
+              "~:y": 0,
+              "~:hide-fill-on-export": false,
+              "~:transform": {
+                "~#matrix": {
+                  "~:a": 1.0,
+                  "~:b": 0.0,
+                  "~:c": 0.0,
+                  "~:d": 1.0,
+                  "~:e": 0.0,
+                  "~:f": 0.0
+                }
+              },
+              "~:rotation": 0,
+              "~:name": "Root Frame",
+              "~:width": 0.01,
+              "~:type": "~:frame",
+              "~:points": [
+                {
+                  "~#point": {
+                    "~:x": 0.0,
+                    "~:y": 0.0
+                  }
+                },
+                {
+                  "~#point": {
+                    "~:x": 0.01,
+                    "~:y": 0.0
+                  }
+                },
+                {
+                  "~#point": {
+                    "~:x": 0.01,
+                    "~:y": 0.01
+                  }
+                },
+                {
+                  "~#point": {
+                    "~:x": 0.0,
+                    "~:y": 0.01
+                  }
+                }
+              ],
+              "~:r2": 0,
+              "~:proportion-lock": false,
+              "~:transform-inverse": {
+                "~#matrix": {
+                  "~:a": 1.0,
+                  "~:b": 0.0,
+                  "~:c": 0.0,
+                  "~:d": 1.0,
+                  "~:e": 0.0,
+                  "~:f": 0.0
+                }
+              },
+              "~:r3": 0,
+              "~:r1": 0,
+              "~:id": "~u00000000-0000-0000-0000-000000000000",
+              "~:parent-id": "~u00000000-0000-0000-0000-000000000000",
+              "~:frame-id": "~u00000000-0000-0000-0000-000000000000",
+              "~:strokes": [],
+              "~:x": 0,
+              "~:proportion": 1.0,
+              "~:r4": 0,
+              "~:selrect": {
+                "~#rect": {
+                  "~:x": 0,
+                  "~:y": 0,
+                  "~:width": 0.01,
+                  "~:height": 0.01,
+                  "~:x1": 0,
+                  "~:y1": 0,
+                  "~:x2": 0.01,
+                  "~:y2": 0.01
+                }
+              },
+              "~:fills": [
+                {
+                  "~:fill-color": "#FFFFFF",
+                  "~:fill-opacity": 1
+                }
+              ],
+              "~:flip-x": null,
+              "~:height": 0.01,
+              "~:flip-y": null,
+              "~:shapes": ["~ucc6f0580-449c-8019-8006-9345db077fa0"]
+            }
+          },
+          "~ucc6f0580-449c-8019-8006-9345db077fa0": {
+            "~#shape": {
+              "~:y": 438,
+              "~:transform": {
+                "~#matrix": {
+                  "~:a": 1.0,
+                  "~:b": 0.0,
+                  "~:c": 0.0,
+                  "~:d": 1.0,
+                  "~:e": 0.0,
+                  "~:f": 0.0
+                }
+              },
+              "~:rotation": 0,
+              "~:grow-type": "~:auto-width",
+              "~:content": {
+                "~:type": "root",
+                "~:key": "1s4am1jl24s",
+                "~:children": [
+                  {
+                    "~:type": "paragraph-set",
+                    "~:children": [
+                      {
+                        "~:line-height": "1.2",
+                        "~:font-style": "normal",
+                        "~:children": [
+                          {
+                            "~:line-height": "1.2",
+                            "~:font-style": "normal",
+                            "~:typography-ref-id": null,
+                            "~:text-transform": "none",
+                            "~:font-id": "sourcesanspro",
+                            "~:key": "13p0zwl2yhc",
+                            "~:font-size": "14",
+                            "~:font-weight": "400",
+                            "~:typography-ref-file": null,
+                            "~:font-variant-id": "regular",
+                            "~:text-decoration": "none",
+                            "~:letter-spacing": "0",
+                            "~:fills": [
+                              {
+                                "~:fill-color": "#000000",
+                                "~:fill-opacity": 1
+                              }
+                            ],
+                            "~:font-family": "sourcesanspro",
+                            "~:text": "Lorem ipsum"
+                          }
+                        ],
+                        "~:typography-ref-id": null,
+                        "~:text-transform": "none",
+                        "~:text-align": "left",
+                        "~:font-id": "sourcesanspro",
+                        "~:key": "20hf3kmyoub",
+                        "~:font-size": "14",
+                        "~:font-weight": "400",
+                        "~:typography-ref-file": null,
+                        "~:text-direction": "ltr",
+                        "~:type": "paragraph",
+                        "~:font-variant-id": "regular",
+                        "~:text-decoration": "none",
+                        "~:letter-spacing": "0",
+                        "~:fills": [
+                          {
+                            "~:fill-color": "#000000",
+                            "~:fill-opacity": 1
+                          }
+                        ],
+                        "~:font-family": "sourcesanspro"
+                      }
+                    ]
+                  }
+                ],
+                "~:vertical-align": "top"
+              },
+              "~:hide-in-viewer": false,
+              "~:name": "Lorem ipsum",
+              "~:width": 77,
+              "~:type": "~:text",
+              "~:points": [
+                {
+                  "~#point": {
+                    "~:x": 404,
+                    "~:y": 438
+                  }
+                },
+                {
+                  "~#point": {
+                    "~:x": 481,
+                    "~:y": 438
+                  }
+                },
+                {
+                  "~#point": {
+                    "~:x": 481,
+                    "~:y": 455
+                  }
+                },
+                {
+                  "~#point": {
+                    "~:x": 404,
+                    "~:y": 455
+                  }
+                }
+              ],
+              "~:transform-inverse": {
+                "~#matrix": {
+                  "~:a": 1.0,
+                  "~:b": 0.0,
+                  "~:c": 0.0,
+                  "~:d": 1.0,
+                  "~:e": 0.0,
+                  "~:f": 0.0
+                }
+              },
+              "~:id": "~ucc6f0580-449c-8019-8006-9345db077fa0",
+              "~:parent-id": "~u00000000-0000-0000-0000-000000000000",
+              "~:frame-id": "~u00000000-0000-0000-0000-000000000000",
+              "~:x": 404,
+              "~:selrect": {
+                "~#rect": {
+                  "~:x": 404,
+                  "~:y": 438,
+                  "~:width": 77,
+                  "~:height": 17,
+                  "~:x1": 404,
+                  "~:y1": 438,
+                  "~:x2": 481,
+                  "~:y2": 455
+                }
+              },
+              "~:flip-x": null,
+              "~:height": 17,
+              "~:flip-y": null
+            }
+          }
+        },
+        "~:id": "~u238a17e0-75ff-8075-8006-934586ea2231",
+        "~:name": "Page 1"
+      }
+    },
+    "~:id": "~u238a17e0-75ff-8075-8006-934586ea2230",
+    "~:options": {
+      "~:components-v2": true,
+      "~:base-font-size": "16px"
+    }
+  }
+}

frontend/playwright/data/text-editor/update-file-11552.json

@@ -1,5 +1 @@
-{
-    "~:revn": 2,
-    "~:lagged": []
-
-}
+w

frontend/playwright/data/text-editor/update-file.json

@@ -0,0 +1,4 @@
+{
+  "~:revn": 2,
+  "~:lagged": []
+}

frontend/playwright/helpers/Clipboard.js

@@ -0,0 +1,36 @@
+export class Clipboard {
+  static Permission = {
+    ONLY_READ: ['clipboard-read'],
+    ONLY_WRITE: ['clipboard-write'],
+    ALL: ['clipboard-read', 'clipboard-write']
+  }
+
+  static enable(context, permissions) {
+    return context.grantPermissions(permissions)
+  }
+
+  static writeText(page, text) {
+    return page.evaluate((text) => navigator.clipboard.writeText(text), text);
+  }
+
+  static readText(page) {
+    return page.evaluate(() => navigator.clipboard.readText());
+  }
+
+  constructor(page, context) {
+    this.page = page
+    this.context = context
+  }
+
+  enable(permissions) {
+    return Clipboard.enable(this.context, permissions);
+  }
+
+  writeText(text) {
+    return Clipboard.writeText(this.page, text);
+  }
+
+  readText() {
+    return Clipboard.readText(this.page);
+  }
+}

frontend/playwright/helpers/Transit.js

@@ -0,0 +1,30 @@
+export class Transit {
+  static parse(value) {
+    if (typeof value !== 'string')
+      return value
+
+    if (value.startsWith('~'))
+      return value.slice(2)
+
+    return value
+  }
+
+  static get(object, ...path) {
+    let aux = object;
+    for (const name of path) {
+      if (typeof name !== 'string') {
+        if (!(name in aux)) {
+          return undefined;
+        }
+        aux = aux[name];
+      } else {
+        const transitName = `~:${name}`;
+        if (!(transitName in aux)) {
+          return undefined;
+        }
+        aux = aux[transitName];
+      }
+    }
+    return this.parse(aux);
+  }
+}

frontend/playwright/ui/pages/BasePage.js

@@ -1,4 +1,27 @@
 export class BasePage {
+  /**
+   * Mocks multiple RPC calls in a single call.
+   *
+   * @param {Page} page
+   * @param {object<string, string>} paths
+   * @param {*} options
+   * @returns {Promise<void>}
+   */
+  static async mockRPCs(page, paths, options) {
+    for (const [path, jsonFilename] of Object.entries(paths)) {
+      await this.mockRPC(page, path, jsonFilename, options)
+    }
+  }
+
+  /**
+   * Mocks an RPC call using a file.
+   *
+   * @param {Page} page
+   * @param {string} path
+   * @param {string} jsonFilename
+   * @param {*} options
+   * @returns {Promise<void>}
+   */
   static async mockRPC(page, path, jsonFilename, options) {
     if (!page) {
       throw new TypeError("Invalid page argument. Must be a Playwright page.");
@@ -93,6 +116,10 @@ export class BasePage {
     return this.#page;
   }
 
+  async mockRPCs(paths, options) {
+    return BasePage.mockRPCs(this.page, paths, options);
+  }
+
   async mockRPC(path, jsonFilename, options) {
     return BasePage.mockRPC(this.page, path, jsonFilename, options);
   }

frontend/playwright/ui/pages/WorkspacePage.js

@@ -1,7 +1,146 @@
 import { expect } from "@playwright/test";
+import { readFile } from 'node:fs/promises';
 import { BaseWebSocketPage } from "./BaseWebSocketPage";
+import { Transit } from '../../helpers/Transit';
 
 export class WorkspacePage extends BaseWebSocketPage {
+  static TextEditor = class TextEditor {
+    constructor(workspacePage) {
+      this.workspacePage = workspacePage;
+
+      // locators.
+      this.fontSize = this.workspacePage.rightSidebar.getByRole("textbox", {
+        name: "Font Size",
+      });
+      this.lineHeight = this.workspacePage.rightSidebar.getByRole("textbox", {
+        name: "Line Height",
+      });
+      this.letterSpacing = this.workspacePage.rightSidebar.getByRole(
+        "textbox",
+        {
+          name: "Letter Spacing",
+        },
+      );
+    }
+
+    get page() {
+      return this.workspacePage.page;
+    }
+
+    async waitForStyle(locator, styleName) {
+      return locator.evaluate(
+        (element, styleName) => element.style.getPropertyValue(styleName),
+        styleName,
+      );
+    }
+
+    async waitForEditor() {
+      return this.page.waitForSelector('[data-itype="editor"]');
+    }
+
+    async waitForRoot() {
+      return this.page.waitForSelector('[data-itype="root"]');
+    }
+
+    async waitForParagraph(nth) {
+      if (!nth) {
+        return this.page.waitForSelector('[data-itype="paragraph"]');
+      }
+      return this.page.waitForSelector(
+        `[data-itype="paragraph"]:nth-child(${nth})`,
+      );
+    }
+
+    async waitForParagraphStyle(nth, styleName) {
+      const paragraph = await this.waitForParagraph(nth);
+      return this.waitForStyle(paragraph, styleName);
+    }
+
+    async waitForTextSpan(nth = 0) {
+      if (!nth) {
+        return this.page.waitForSelector('[data-itype="inline"]');
+      }
+      return this.page.waitForSelector(
+        `[data-itype="inline"]:nth-child(${nth})`,
+      );
+    }
+
+    async waitForTextSpanContent(nth = 0) {
+      const textSpan = await this.waitForTextSpan(nth);
+      const textContent = await textSpan.textContent();
+      return textContent;
+    }
+
+    async waitForTextSpanStyle(nth, styleName) {
+      const textSpan = await this.waitForTextSpan(nth);
+      return this.waitForStyle(textSpan, styleName);
+    }
+
+    async startEditing() {
+      await this.page.keyboard.press("Enter");
+      return this.waitForEditor();
+    }
+
+    stopEditing() {
+      return this.page.keyboard.press("Escape");
+    }
+
+    async moveToLeft(amount = 0) {
+      for (let i = 0; i < amount; i++) {
+        await this.page.keyboard.press("ArrowLeft");
+      }
+    }
+
+    async moveToRight(amount = 0) {
+      for (let i = 0; i < amount; i++) {
+        await this.page.keyboard.press("ArrowRight");
+      }
+    }
+
+    async moveFromStart(offset = 0) {
+      await this.page.keyboard.press("ArrowLeft");
+      await this.moveToRight(offset);
+    }
+
+    async moveFromEnd(offset = 0) {
+      await this.page.keyboard.press("ArrowRight");
+      await this.moveToLeft(offset);
+    }
+
+    async selectFromStart(length, offset = 0) {
+      await this.moveFromStart(offset);
+      await this.page.keyboard.down("Shift");
+      await this.moveToRight(length);
+      await this.page.keyboard.up("Shift");
+    }
+
+    async selectFromEnd(length, offset = 0) {
+      await this.moveFromEnd(offset);
+      await this.page.keyboard.down("Shift");
+      await this.moveToLeft(length);
+      await this.page.keyboard.up("Shift");
+    }
+
+    async changeNumericInput(locator, newValue) {
+      await expect(locator).toBeVisible();
+      await locator.focus();
+      await locator.fill(`${newValue}`);
+      await locator.blur();
+    }
+
+    changeFontSize(newValue) {
+      return this.changeNumericInput(this.fontSize, newValue);
+    }
+
+    changeLineHeight(newValue) {
+      return this.changeNumericInput(this.lineHeight, newValue);
+    }
+
+    changeLetterSpacing(newValue) {
+      return this.changeNumericInput(this.letterSpacing, newValue);
+    }
+  };
+
   /**
    * This should be called on `test.beforeEach`.
    *
@@ -11,50 +150,21 @@ export class WorkspacePage extends BaseWebSocketPage {
   static async init(page) {
     await BaseWebSocketPage.initWebSockets(page);
 
-    await BaseWebSocketPage.mockRPC(
-      page,
-      "get-profile",
-      "logged-in-user/get-profile-logged-in.json",
-    );
-    await BaseWebSocketPage.mockRPC(
-      page,
-      "get-team-users?file-id=*",
+    await BaseWebSocketPage.mockRPCs(page, {
+      "get-profile": "logged-in-user/get-profile-logged-in.json",
+      "get-team-users?file-id=*":
         "logged-in-user/get-team-users-single-user.json",
-    );
-    await BaseWebSocketPage.mockRPC(
-      page,
-      "get-comment-threads?file-id=*",
+      "get-comment-threads?file-id=*":
         "workspace/get-comment-threads-empty.json",
-    );
-    await BaseWebSocketPage.mockRPC(
-      page,
-      "get-project?id=*",
-      "workspace/get-project-default.json",
-    );
-    await BaseWebSocketPage.mockRPC(
-      page,
-      "get-team?id=*",
-      "workspace/get-team-default.json",
-    );
-    await BaseWebSocketPage.mockRPC(page, "get-teams", "get-teams.json");
-
-    await BaseWebSocketPage.mockRPC(
-      page,
-      "get-team-members?team-id=*",
+      "get-project?id=*": "workspace/get-project-default.json",
+      "get-team?id=*": "workspace/get-team-default.json",
+      "get-teams": "get-teams.json",
+      "get-team-members?team-id=*":
         "logged-in-user/get-team-members-your-penpot.json",
-    );
-
-    await BaseWebSocketPage.mockRPC(
-      page,
-      "get-profiles-for-file-comments?file-id=*",
+      "get-profiles-for-file-comments?file-id=*":
         "workspace/get-profile-for-file-comments.json",
-    );
-
-    await BaseWebSocketPage.mockRPC(
-      page,
-      "update-profile-props",
-      "workspace/update-profile-empty.json",
-    );
+      "update-profile-props": "workspace/update-profile-empty.json",
+    });
   }
 
   static anyTeamId = "c7ce0794-0992-8105-8004-38e630f7920a";
@@ -62,9 +172,20 @@ export class WorkspacePage extends BaseWebSocketPage {
   static anyFileId = "c7ce0794-0992-8105-8004-38f280443849";
   static anyPageId = "c7ce0794-0992-8105-8004-38f28044384a";
 
+  /**
+   * WebSocket mock
+   *
+   * @type {MockWebSocketHelper}
+   */
   #ws = null;
 
-  constructor(page) {
+  /**
+   * Constructor
+   *
+   * @param {Page} page
+   * @param {} [options]
+   */
+  constructor(page, options) {
     super(page);
     this.pageName = page.getByTestId("page-name");
 
@@ -112,11 +233,14 @@ export class WorkspacePage extends BaseWebSocketPage {
       "tokens-context-menu-for-set",
     );
     this.contextMenuForShape = page.getByTestId("context-menu");
+    if (options?.textEditor) {
+      this.textEditor = new WorkspacePage.TextEditor(this);
+    }
   }
 
   async goToWorkspace({
-    fileId = WorkspacePage.anyFileId,
-    pageId = WorkspacePage.anyPageId,
+    fileId = this.fileId ?? WorkspacePage.anyFileId,
+    pageId = this.pageId ?? WorkspacePage.anyPageId,
   } = {}) {
     await this.page.goto(
       `/#/workspace?team-id=${WorkspacePage.anyTeamId}&file-id=${fileId}&page-id=${pageId}`,
@@ -141,48 +265,59 @@ export class WorkspacePage extends BaseWebSocketPage {
   }
 
   async setupEmptyFile() {
-    await this.mockRPC(
-      "get-profile",
-      "logged-in-user/get-profile-logged-in.json",
-    );
-    await this.mockRPC(
-      "get-team-users?file-id=*",
+    await this.mockRPCs({
+      "get-profile": "logged-in-user/get-profile-logged-in.json",
+      "get-team-users?file-id=*":
         "logged-in-user/get-team-users-single-user.json ",
-    );
-    await this.mockRPC(
-      "get-comment-threads?file-id=*",
+      "get-comment-threads?file-id=*":
         "workspace/get-comment-threads-empty.json",
-    );
-    await this.mockRPC(
-      "get-project?id=*",
-      "workspace/get-project-default.json",
-    );
-    await this.mockRPC("get-team?id=*", "workspace/get-team-default.json");
-    await this.mockRPC(
-      "get-profiles-for-file-comments?file-id=*",
+      "get-project?id=*": "workspace/get-project-default.json",
+      "get-team?id=*": "workspace/get-team-default.json",
+      "get-profiles-for-file-comments?file-id=*":
         "workspace/get-profile-for-file-comments.json",
-    );
-    await this.mockRPC(/get\-file\?/, "workspace/get-file-blank.json");
-    await this.mockRPC(
-      "get-file-object-thumbnails?file-id=*",
+      "get-file-object-thumbnails?file-id=*":
         "workspace/get-file-object-thumbnails-blank.json",
-    );
-    await this.mockRPC(
-      "get-font-variants?team-id=*",
-      "workspace/get-font-variants-empty.json",
-    );
-    await this.mockRPC(
-      "get-file-fragment?file-id=*",
-      "workspace/get-file-fragment-blank.json",
-    );
-    await this.mockRPC(
-      "get-file-libraries?file-id=*",
-      "workspace/get-file-libraries-empty.json",
-    );
+      "get-font-variants?team-id=*": "workspace/get-font-variants-empty.json",
+      "get-file-fragment?file-id=*": "workspace/get-file-fragment-blank.json",
+      "get-file-libraries?file-id=*": "workspace/get-file-libraries-empty.json",
+    });
+
+    if (this.textEditor) {
+      await this.mockRPC("update-file?id=*", "text-editor/update-file.json");
     }
 
-  async mockGetFile(jsonFile) {
-    await this.mockRPC(/get\-file\?/, jsonFile);
+    // by default we mock the blank file.
+    await this.mockGetFile("workspace/get-file-blank.json");
+  }
+
+  async mockGetFile(jsonFilename, options) {
+    const page = this.page;
+    const jsonPath = `playwright/data/${jsonFilename}`;
+    const body = await readFile(jsonPath, "utf-8");
+    const payload = JSON.parse(body);
+
+    const fileId = Transit.get(payload, "id");
+    const pageId = Transit.get(payload, "data", "pages", 0);
+    const teamId = Transit.get(payload, "team-id");
+
+    this.fileId = fileId ?? this.anyFileId;
+    this.pageId = pageId ?? this.anyPageId;
+    this.teamId = teamId ?? this.anyTeamId;
+
+    const path = /get\-file\?/;
+    const url = typeof path === "string" ? `**/api/main/methods/${path}` : path;
+    const interceptConfig = {
+      status: 200,
+      contentType: "application/transit+json",
+      ...options,
+    };
+    return page.route(url, (route) =>
+      route.fulfill({
+        ...interceptConfig,
+        body,
+      }),
+    );
+    // await this.mockRPC(/get\-file\?/, jsonFile);
   }
 
   async mockGetAsset(regex, asset) {
@@ -190,22 +325,15 @@ export class WorkspacePage extends BaseWebSocketPage {
   }
 
   async setupFileWithComments() {
-    await this.mockRPC(
-      "get-comment-threads?file-id=*",
+    await this.mockRPCs({
+      "get-comment-threads?file-id=*":
         "workspace/get-comment-threads-unread.json",
-    );
-    await this.mockRPC(
-      "get-file-fragment?file-id=*&fragment-id=*",
+      "get-file-fragment?file-id=*&fragment-id=*":
         "viewer/get-file-fragment-single-board.json",
-    );
-    await this.mockRPC(
-      "get-comments?thread-id=*",
-      "workspace/get-thread-comments.json",
-    );
-    await this.mockRPC(
-      "update-comment-thread-status",
+      "get-comments?thread-id=*": "workspace/get-thread-comments.json",
+      "update-comment-thread-status":
         "workspace/update-comment-thread-status.json",
-    );
+    });
   }
 
   async clickWithDragViewportAt(x, y, width, height) {
@@ -223,6 +351,67 @@ export class WorkspacePage extends BaseWebSocketPage {
     await this.page.mouse.up();
   }
 
+  /**
+   * Clicks and moves from the coordinates x1,y1 to x2,y2
+   *
+   * @param {number} x1
+   * @param {number} y1
+   * @param {number} x2
+   * @param {number} y2
+   */
+  async clickAndMove(x1, y1, x2, y2) {
+    await this.page.waitForTimeout(100);
+    await this.viewport.hover({ position: { x: x1, y: y1 } });
+    await this.page.mouse.down();
+    await this.viewport.hover({ position: { x: x2, y: y2 } });
+    await this.page.mouse.up();
+  }
+
+  /**
+   * Creates a new Text Shape in the specified coordinates
+   * with an initial text.
+   *
+   * @param {number} x1
+   * @param {number} y1
+   * @param {number} x2
+   * @param {number} y2
+   * @param {string} initialText
+   * @param {*} [options]
+   */
+  async createTextShape(x1, y1, x2, y2, initialText, options) {
+    const timeToWait = options?.timeToWait ?? 100;
+    await this.page.keyboard.press("T");
+    await this.page.waitForTimeout(timeToWait);
+    await this.clickAndMove(x1, y1, x2, y2);
+    await this.page.waitForTimeout(timeToWait);
+    if (initialText) {
+      await this.page.keyboard.type(initialText);
+    }
+  }
+
+  /**
+   * Copies the selected element into the clipboard.
+   *
+   * @returns {Promise<void>}
+   */
+  async copy() {
+    return this.page.keyboard.press("Control+C");
+  }
+
+  /**
+   * Pastes something from the clipboard.
+   *
+   * @param {"keyboard"|"context-menu"} [kind="keyboard"]
+   * @returns {Promise<void>}
+   */
+  async paste(kind = "keyboard") {
+    if (kind === "context-menu") {
+      await this.viewport.click({ button: "right" });
+      return this.page.getByText("PasteCtrlV").click();
+    }
+    return this.page.keyboard.press("Control+V");
+  }
+
   async panOnViewportAt(x, y, width, height) {
     await this.page.waitForTimeout(100);
     await this.viewport.hover({ position: { x, y } });
@@ -250,6 +439,11 @@ export class WorkspacePage extends BaseWebSocketPage {
     await this.page.waitForTimeout(500);
   }
 
+  async doubleClickLeafLayer(name, clickOptions = {}) {
+    await this.clickLeafLayer(name, clickOptions);
+    await this.clickLeafLayer(name, clickOptions);
+  }
+
   async clickToggableLayer(name, clickOptions = {}) {
     const layer = this.layers
       .getByTestId("layer-row")

frontend/playwright/ui/specs/text-editor-v2.spec.js

@@ -1,12 +1,317 @@
 import { test, expect } from "@playwright/test";
+import { Clipboard } from '../../helpers/Clipboard';
 import { WorkspacePage } from "../pages/WorkspacePage";
 
-test.beforeEach(async ({ page }) => {
+const timeToWait = 100;
+
+test.beforeEach(async ({ page, context }) => {
+  await Clipboard.enable(context, Clipboard.Permission.ONLY_WRITE);
+
   await WorkspacePage.init(page);
   await WorkspacePage.mockConfigFlags(page, ["enable-feature-text-editor-v2"]);
 });
 
-test.skip("BUG 11552 - Apply styles to the current caret", async ({ page }) => {
+test.afterEach(async ({ context}) => {
+  context.clearPermissions();
+})
+
+test("Create a new text shape", async ({ page }) => {
+  const initialText = "Lorem ipsum";
+  const workspace = new WorkspacePage(page, {
+    textEditor: true
+  });
+  await workspace.setupEmptyFile();
+  await workspace.goToWorkspace();
+  await workspace.createTextShape(190, 150, 300, 200, initialText);
+
+  const textContent = await workspace.textEditor.waitForTextSpanContent();
+  expect(textContent).toBe(initialText);
+
+  await workspace.textEditor.stopEditing();
+});
+
+test("Create a new text shape from pasting text", async ({ page, context }) => {
+  const textToPaste = "Lorem ipsum";
+  const workspace = new WorkspacePage(page, {
+    textEditor: true,
+  });
+  await workspace.setupEmptyFile();
+  await workspace.mockRPC(
+    "update-file?id=*",
+    "text-editor/update-file.json",
+  );
+  await workspace.goToWorkspace();
+
+  await Clipboard.writeText(page, textToPaste);
+
+  await workspace.clickAt(190, 150);
+  await workspace.paste("keyboard");
+
+  await page.waitForTimeout(timeToWait);
+
+  const textContent = await workspace.textEditor.waitForTextSpanContent();
+  expect(textContent).toBe(textToPaste);
+
+  await workspace.textEditor.stopEditing();
+});
+
+test("Create a new text shape from pasting text using context menu", async ({ page, context }) => {
+  const textToPaste = "Lorem ipsum";
+  const workspace = new WorkspacePage(page, {
+    textEditor: true
+  });
+  await workspace.setupEmptyFile();
+  await workspace.goToWorkspace();
+
+  await Clipboard.writeText(page, textToPaste);
+
+  await workspace.clickAt(190, 150);
+  await workspace.paste("context-menu");
+
+  const textContent = await workspace.textEditor.waitForTextSpanContent();
+  expect(textContent).toBe(textToPaste);
+
+  await workspace.textEditor.stopEditing();
+})
+
+test("Update an already created text shape by appending text", async ({ page }) => {
+  const workspace = new WorkspacePage(page, {
+    textEditor: true
+  });
+  await workspace.setupEmptyFile();
+  await workspace.mockGetFile("text-editor/get-file-lorem-ipsum.json");
+  await workspace.goToWorkspace();
+  await workspace.clickLeafLayer("Lorem ipsum");
+  await workspace.textEditor.startEditing();
+  await workspace.textEditor.moveFromEnd(0);
+  await page.keyboard.type(" dolor sit amet");
+  const textContent = await workspace.textEditor.waitForTextSpanContent();
+  expect(textContent).toBe("Lorem ipsum dolor sit amet");
+  await workspace.textEditor.stopEditing();
+});
+
+test("Update an already created text shape by prepending text", async ({
+  page,
+}) => {
+  const workspace = new WorkspacePage(page, {
+    textEditor: true
+  });
+  await workspace.setupEmptyFile();
+  await workspace.mockGetFile("text-editor/get-file-lorem-ipsum.json");
+  await workspace.goToWorkspace();
+  await workspace.clickLeafLayer("Lorem ipsum");
+  await workspace.textEditor.startEditing();
+  await workspace.textEditor.moveFromStart(0);
+  await page.keyboard.type("Dolor sit amet ");
+  const textContent = await workspace.textEditor.waitForTextSpanContent();
+  expect(textContent).toBe("Dolor sit amet Lorem ipsum");
+  await workspace.textEditor.stopEditing();
+});
+
+test("Update an already created text shape by inserting text in between", async ({
+  page,
+}) => {
+  const workspace = new WorkspacePage(page, {
+    textEditor: true
+  });
+  await workspace.setupEmptyFile();
+  await workspace.mockGetFile("text-editor/get-file-lorem-ipsum.json");
+  await workspace.goToWorkspace();
+  await workspace.clickLeafLayer("Lorem ipsum");
+  await workspace.textEditor.startEditing();
+  await workspace.textEditor.moveFromStart(5);
+  await page.keyboard.type(" dolor sit amet");
+  const textContent = await workspace.textEditor.waitForTextSpanContent();
+  expect(textContent).toBe("Lorem dolor sit amet ipsum");
+  await workspace.textEditor.stopEditing();
+});
+
+test("Update a new text shape appending text by pasting text", async ({ page, context }) => {
+  const textToPaste = " dolor sit amet";
+  const workspace = new WorkspacePage(page, {
+    textEditor: true
+  });
+  await workspace.setupEmptyFile();
+  await workspace.mockGetFile("text-editor/get-file-lorem-ipsum.json");
+  await workspace.goToWorkspace();
+
+  await Clipboard.writeText(page, textToPaste);
+
+  await workspace.clickLeafLayer("Lorem ipsum");
+  await workspace.textEditor.startEditing();
+  await workspace.textEditor.moveFromEnd();
+  await workspace.paste("keyboard");
+  const textContent = await workspace.textEditor.waitForTextSpanContent();
+  expect(textContent).toBe("Lorem ipsum dolor sit amet");
+  await workspace.textEditor.stopEditing();
+});
+
+test("Update a new text shape prepending text by pasting text", async ({
+  page, context
+}) => {
+  const textToPaste = "Dolor sit amet ";
+  const workspace = new WorkspacePage(page, {
+    textEditor: true
+  });
+  await workspace.setupEmptyFile();
+  await workspace.mockGetFile("text-editor/get-file-lorem-ipsum.json");
+  await workspace.goToWorkspace();
+
+  await Clipboard.writeText(page, textToPaste);
+
+  await workspace.clickLeafLayer("Lorem ipsum");
+  await workspace.textEditor.startEditing();
+  await workspace.textEditor.moveFromStart();
+  await workspace.paste("keyboard");
+  const textContent = await workspace.textEditor.waitForTextSpanContent();
+  expect(textContent).toBe("Dolor sit amet Lorem ipsum");
+  await workspace.textEditor.stopEditing();
+});
+
+test("Update a new text shape replacing (starting) text with pasted text", async ({
+  page,
+}) => {
+  const textToPaste = "Dolor sit amet";
+  const workspace = new WorkspacePage(page, {
+    textEditor: true
+  });
+  await workspace.setupEmptyFile();
+  await workspace.mockGetFile("text-editor/get-file-lorem-ipsum.json");
+  await workspace.goToWorkspace();
+  await workspace.clickLeafLayer("Lorem ipsum");
+  await workspace.textEditor.startEditing();
+  await workspace.textEditor.selectFromStart(5);
+
+  await Clipboard.writeText(page, textToPaste);
+
+  await workspace.paste("keyboard");
+
+  const textContent = await workspace.textEditor.waitForTextSpanContent();
+  expect(textContent).toBe("Dolor sit amet ipsum");
+
+  await workspace.textEditor.stopEditing();
+});
+
+test("Update a new text shape replacing (ending) text with pasted text", async ({
+  page,
+}) => {
+  const textToPaste = "dolor sit amet";
+  const workspace = new WorkspacePage(page, {
+    textEditor: true
+  });
+  await workspace.setupEmptyFile();
+  await workspace.mockGetFile("text-editor/get-file-lorem-ipsum.json");
+  await workspace.goToWorkspace();
+  await workspace.clickLeafLayer("Lorem ipsum");
+  await workspace.textEditor.startEditing();
+  await workspace.textEditor.selectFromEnd(5);
+
+  await Clipboard.writeText(page, textToPaste);
+
+  await workspace.paste("keyboard");
+
+  const textContent = await workspace.textEditor.waitForTextSpanContent();
+  expect(textContent).toBe("Lorem dolor sit amet");
+
+  await workspace.textEditor.stopEditing();
+});
+
+test("Update a new text shape replacing (in between) text with pasted text", async ({
+  page,
+}) => {
+  const textToPaste = "dolor sit amet";
+  const workspace = new WorkspacePage(page, {
+    textEditor: true
+  });
+  await workspace.setupEmptyFile();
+  await workspace.mockGetFile("text-editor/get-file-lorem-ipsum.json");
+  await workspace.goToWorkspace();
+  await workspace.clickLeafLayer("Lorem ipsum");
+  await workspace.textEditor.startEditing();
+  await workspace.textEditor.selectFromStart(5, 3);
+
+  await Clipboard.writeText(page, textToPaste);
+
+  await workspace.paste("keyboard");
+
+  const textContent = await workspace.textEditor.waitForTextSpanContent();
+  expect(textContent).toBe("Lordolor sit ametsum");
+
+  await workspace.textEditor.stopEditing();
+});
+
+test("Update text font size selecting a part of it (starting)", async ({
+  page,
+}) => {
+  const workspace = new WorkspacePage(page, {
+    textEditor: true
+  });
+  await workspace.setupEmptyFile();
+  await workspace.mockGetFile("text-editor/get-file-lorem-ipsum.json");
+  await workspace.mockRPC(
+    "update-file?id=*",
+    "text-editor/update-file.json",
+  );
+  await workspace.goToWorkspace();
+  await workspace.clickLeafLayer("Lorem ipsum");
+  await workspace.textEditor.startEditing();
+  await workspace.textEditor.selectFromStart(5);
+  await workspace.textEditor.changeFontSize(36);
+
+  const textContent1 = await workspace.textEditor.waitForTextSpanContent(1);
+  expect(textContent1).toBe("Lorem");
+  const textContent2 = await workspace.textEditor.waitForTextSpanContent(2);
+  expect(textContent2).toBe(" ipsum");
+  await workspace.textEditor.stopEditing();
+});
+
+test.skip("Update text line height selecting a part of it (starting)", async ({
+  page,
+}) => {
+  const workspace = new WorkspacePage(page, {
+    textEditor: true,
+  });
+  await workspace.setupEmptyFile();
+  await workspace.mockGetFile("text-editor/get-file-lorem-ipsum.json");
+  await workspace.mockRPC("update-file?id=*", "text-editor/update-file.json");
+  await workspace.goToWorkspace();
+  await workspace.clickLeafLayer("Lorem ipsum");
+  await workspace.textEditor.startEditing();
+  await workspace.textEditor.selectFromStart(5);
+  await workspace.textEditor.changeLineHeight(1.4);
+
+  const lineHeight = await workspace.textEditor.waitForParagraphStyle(1, 'line-height');
+  expect(lineHeight).toBe("1.4");
+
+  const textContent = await workspace.textEditor.waitForTextSpanContent();
+  expect(textContent).toBe("Lorem ipsum");
+
+  await workspace.textEditor.stopEditing();
+});
+
+test.skip("Update text letter spacing selecting a part of it (starting)", async ({
+  page,
+}) => {
+  const workspace = new WorkspacePage(page, {
+    textEditor: true,
+  });
+  await workspace.setupEmptyFile();
+  await workspace.mockGetFile("text-editor/get-file-lorem-ipsum.json");
+  await workspace.mockRPC("update-file?id=*", "text-editor/update-file.json");
+  await workspace.goToWorkspace();
+  await workspace.clickLeafLayer("Lorem ipsum");
+  await workspace.textEditor.startEditing();
+  await workspace.textEditor.selectFromStart(5);
+  await workspace.textEditor.changeLetterSpacing(10);
+
+  const textContent1 = await workspace.textEditor.waitForTextSpanContent(1);
+  expect(textContent1).toBe("Lorem");
+  const textContent2 = await workspace.textEditor.waitForTextSpanContent(2);
+  expect(textContent2).toBe(" ipsum");
+  await workspace.textEditor.stopEditing();
+});
+
+test("BUG 11552 - Apply styles to the current caret", async ({ page }) => {
   const workspace = new WorkspacePage(page);
   await workspace.setupEmptyFile();
   await workspace.mockGetFile("text-editor/get-file-11552.json");
@@ -14,21 +319,16 @@ test.skip("BUG 11552 - Apply styles to the current caret", async ({ page }) => {
     "update-file?id=*",
     "text-editor/update-file-11552.json",
   );
-
-  await workspace.goToWorkspace({
-    fileId: "238a17e0-75ff-8075-8006-934586ea2230",
-    pageId: "238a17e0-75ff-8075-8006-934586ea2231",
-  });
-  await workspace.clickLeafLayer("Lorem ipsum");
-  await workspace.clickLeafLayer("Lorem ipsum");
+  await workspace.goToWorkspace();
+  await workspace.doubleClickLeafLayer("Lorem ipsum");
 
   const fontSizeInput = workspace.rightSidebar.getByRole("textbox", {
     name: "Font Size",
   });
   await expect(fontSizeInput).toBeVisible();
 
-  await workspace.page.keyboard.press("Enter");
-  await workspace.page.keyboard.press("ArrowRight");
+  await page.keyboard.press("Enter");
+  await page.keyboard.press("ArrowRight");
 
   await fontSizeInput.fill("36");
 

frontend/src/app/main/data/workspace/texts.cljs

@@ -831,7 +831,8 @@
     (effect [_ state _]
       (when (features/active-feature? state "text-editor/v2")
         (let [instance (:workspace-editor state)
-              attrs-to-override (some-> (editor.v2/getCurrentStyle instance) (styles/get-styles-from-style-declaration))
+              attrs-to-override (some-> (editor.v2/getCurrentStyle instance)
+                                        (styles/get-styles-from-style-declaration))
               overriden-attrs (merge attrs-to-override attrs)
               styles  (styles/attrs->styles overriden-attrs)]
           (editor.v2/applyStylesToSelection instance styles))))))

frontend/src/app/main/ui/workspace/sidebar/options/menus/typography.cljs

@@ -378,6 +378,7 @@
         :step 0.1
         :default-value "1.2"
         :class (stl/css :line-height-input)
+        :aria-label (tr "inspect.attributes.typography.line-height")
         :value (attr->string line-height)
         :placeholder (if (= :multiple line-height) (tr "settings.multiple") "--")
         :nillable (= :multiple line-height)
@@ -396,6 +397,7 @@
         :step 0.1
         :default-value "0"
         :class (stl/css :letter-spacing-input)
+        :aria-label (tr "inspect.attributes.typography.letter-spacing")
         :value (attr->string letter-spacing)
         :placeholder (if (= :multiple letter-spacing) (tr "settings.multiple") "--")
         :on-change #(handle-change % :letter-spacing)

frontend/src/app/util/text/content/styles.cljs

@@ -48,6 +48,9 @@
   "This function strips units from attr values and un-scapes font-family"
   [k v]
   (cond
+    (= v "mixed")
+    :multiple
+
     (and (or (= k :font-size)
              (= k :letter-spacing))
          (= (str/slice v -2) "px"))

frontend/text-editor/src/editor/TextEditor.js

@@ -26,6 +26,7 @@ import LayoutType from "./layout/LayoutType.js";
  * @typedef {Object} TextEditorOptions
  * @property {CSSStyleDeclaration|Object.<string,*>} [styleDefaults]
  * @property {SelectionControllerDebug} [debug]
+ * @property {boolean} [shouldUpdatePositionOnScroll=false]
  * @property {boolean} [allowHTMLPaste=false]
  */
 
@@ -92,6 +93,21 @@ export class TextEditor extends EventTarget {
    */
   #canvas = null;
 
+  /**
+   * Text editor options.
+   *
+   * @type {TextEditorOptions}
+   */
+  #options = {};
+
+  /**
+   * A boolean indicating that this instance was
+   * disposed or not.
+   *
+   * @type {boolean}
+   */
+  #isDisposed = false;
+
   /**
    * Constructor.
    *
@@ -101,9 +117,9 @@ export class TextEditor extends EventTarget {
    */
   constructor(element, canvas, options) {
     super();
-    if (!(element instanceof HTMLElement))
+    if (!(element instanceof HTMLElement)) {
       throw new TypeError("Invalid text editor element");
-
+    }
     this.#element = element;
     this.#canvas = canvas;
     this.#events = {
@@ -119,6 +135,7 @@ export class TextEditor extends EventTarget {
       keydown: this.#onKeyDown,
     };
     this.#styleDefaults = options?.styleDefaults;
+    this.#options = options;
     this.#setup(options);
   }
 
@@ -150,14 +167,18 @@ export class TextEditor extends EventTarget {
 
   /**
    * Setups the root element.
+   *
+   * @param {TextEditorOptions} options
    */
-  #setupRoot() {
+  #setupRoot(options) {
     this.#root = createEmptyRoot(this.#styleDefaults);
     this.#element.appendChild(this.#root);
   }
 
   /**
    * Setups event listeners.
+   *
+   * @param {TextEditorOptions} options
    */
   #setupListeners(options) {
     this.#changeController.addEventListener("change", this.#onChange);
@@ -174,18 +195,61 @@ export class TextEditor extends EventTarget {
   }
 
   /**
-   * Setups the elements, the properties and the
-   * initial content.
+   * Disposes everything.
    */
-  #setup(options) {
-    this.#setupElementProperties(options);
-    this.#setupRoot(options);
+  dispose() {
+    if (this.#isDisposed) {
+      return this;
+    }
+    this.#isDisposed = true;
+
+    // Dispose change controller.
+    this.#changeController.removeEventListener("change", this.#onChange);
+    this.#changeController.dispose();
+    this.#changeController = null;
+
+    // Disposes selection controller.
+    this.#selectionController.removeEventListener(
+      "stylechange",
+      this.#onStyleChange,
+    );
+    this.#selectionController.dispose();
+    this.#selectionController = null;
+
+    // Disposes the rest of event listeners.
+    removeEventListeners(this.#element, this.#events);
+    if (this.#options.shouldUpdatePositionOnScroll) {
+      window.removeEventListener("scroll", this.#onScroll);
+    }
+
+    // Disposes references to DOM elements.
+    this.#element = null;
+    this.#root = null;
+    return this;
+  }
+
+  /**
+   * Setups controllers.
+   *
+   * @param {TextEditorOptions} options
+   */
+  #setupControllers(options) {
     this.#changeController = new ChangeController(this);
     this.#selectionController = new SelectionController(
       this,
       document.getSelection(),
       options,
     );
+  }
+
+  /**
+   * Setups the elements, the properties and the
+   * initial content.
+   */
+  #setup(options) {
+    this.#setupElementProperties(options);
+    this.#setupRoot(options);
+    this.#setupControllers(options);
     this.#setupListeners(options);
   }
 
@@ -242,7 +306,9 @@ export class TextEditor extends EventTarget {
    * @param {CustomEvent} e
    * @returns {void}
    */
-  #onChange = (e) => this.dispatchEvent(new e.constructor(e.type, e));
+  #onChange = (e) => {
+    this.dispatchEvent(new e.constructor(e.type, e));
+  };
 
   /**
    * Dispatchs a `stylechange` event.
@@ -421,6 +487,15 @@ export class TextEditor extends EventTarget {
     );
   }
 
+  /**
+   * Indicates that the TextEditor was disposed.
+   *
+   * @type {boolean}
+   */
+  get isDisposed() {
+    return this.#isDisposed;
+  }
+
   /**
    * Root element that contains all the paragraphs.
    *
@@ -478,6 +553,15 @@ export class TextEditor extends EventTarget {
     return this.#selectionController.currentStyle;
   }
 
+  /**
+   * Text editor options
+   *
+   * @type {TextEditorOptions}
+   */
+  get options() {
+    return this.#options;
+  }
+
   /**
    * Focus the element
    */
@@ -540,7 +624,8 @@ export class TextEditor extends EventTarget {
    * Applies the current styles to the selection or
    * the current DOM node at the caret.
    *
-   * @param {*} styles
+   * @param {Object.<string, *>} styles
+   * @returns {TextEditor}
    */
   applyStylesToSelection(styles) {
     this.#selectionController.startMutation();
@@ -553,6 +638,8 @@ export class TextEditor extends EventTarget {
 
   /**
    * Selects all content.
+   *
+   * @returns {TextEditor}
    */
   selectAll() {
     this.#selectionController.selectAll();
@@ -562,30 +649,12 @@ export class TextEditor extends EventTarget {
   /**
    * Moves cursor to end.
    *
-   * @returns
+   * @returns {TextEditor}
    */
   cursorToEnd() {
     this.#selectionController.cursorToEnd();
     return this;
   }
-
-  /**
-   * Disposes everything.
-   */
-  dispose() {
-    this.#changeController.removeEventListener("change", this.#onChange);
-    this.#changeController.dispose();
-    this.#changeController = null;
-    this.#selectionController.removeEventListener(
-      "stylechange",
-      this.#onStyleChange,
-    );
-    this.#selectionController.dispose();
-    this.#selectionController = null;
-    removeEventListeners(this.#element, this.#events);
-    this.#element = null;
-    this.#root = null;
-  }
 }
 
 /**
@@ -615,47 +684,98 @@ export function createRootFromString(string) {
   return root;
 }
 
-export function isEditor(instance) {
+/**
+ * Returns true if the passed object is a TextEditor
+ * instance.
+ *
+ * @param {*} instance
+ * @returns {boolean}
+ */
+export function isTextEditor(instance) {
   return instance instanceof TextEditor;
 }
 
-/* Convenience function based API for Text Editor */
+/**
+ * Returns the root element of a TextEditor
+ * instance.
+ *
+ * @param {TextEditor} instance
+ * @returns {HTMLDivElement}
+ */
 export function getRoot(instance) {
-  if (isEditor(instance)) {
+  if (isTextEditor(instance)) {
     return instance.root;
-  } else {
+  }
   return null;
 }
-}
 
+/**
+ * Sets the root of the text editor.
+ *
+ * @param {TextEditor} instance
+ * @param {HTMLDivElement} root
+ * @returns {TextEditor}
+ */
 export function setRoot(instance, root) {
-  if (isEditor(instance)) {
+  if (isTextEditor(instance)) {
     instance.root = root;
   }
 
   return instance;
 }
 
+/**
+ * Creates a new TextEditor instance.
+ *
+ * @param {HTMLDivElement} element
+ * @param {HTMLCanvasElement} canvas
+ * @param {TextEditorOptions} options
+ * @returns {TextEditor}
+ */
 export function create(element, canvas, options) {
   return new TextEditor(element, canvas, { ...options });
 }
 
+/**
+ * Returns the current style of the TextEditor instance.
+ *
+ * @param {TextEditor} instance
+ * @returns {CSSStyleDeclaration|undefined}
+ */
 export function getCurrentStyle(instance) {
-  if (isEditor(instance)) {
+  if (isTextEditor(instance)) {
     return instance.currentStyle;
   }
+  return null;
 }
 
+/**
+ * Applies the specified styles to the TextEditor
+ * passed.
+ *
+ * @param {TextEditor} instance
+ * @param {Object.<string, *>} styles
+ * @returns {TextEditor|null}
+ */
 export function applyStylesToSelection(instance, styles) {
-  if (isEditor(instance)) {
+  if (isTextEditor(instance)) {
     return instance.applyStylesToSelection(styles);
   }
+  return null;
 }
 
+/**
+ * Disposes the current instance resources by nullifying
+ * every property.
+ *
+ * @param {TextEditor} instance
+ * @returns {TextEditor|null}
+ */
 export function dispose(instance) {
-  if (isEditor(instance)) {
-    instance.dispose();
+  if (isTextEditor(instance)) {
+    return instance.dispose();
   }
+  return null;
 }
 
 export default TextEditor;

frontend/text-editor/src/editor/clipboard/paste.js

@@ -10,6 +10,7 @@ import {
   mapContentFragmentFromHTML,
   mapContentFragmentFromString,
 } from "../content/dom/Content.js";
+import { TextEditor } from "../TextEditor.js";
 
 /**
  * Returns a DocumentFragment from text/html.
@@ -38,19 +39,26 @@ function getPlainFragmentFromClipboardData(selectionController, clipboardData) {
 }
 
 /**
- * Returns a DocumentFragment (or null) if it contains
- * a compatible clipboardData type.
+ * Returns a document fragment of html data.
  *
  * @param {DataTransfer} clipboardData
- * @returns {DocumentFragment|null}
+ * @returns {DocumentFragment}
  */
-function getFragmentFromClipboardData(selectionController, clipboardData) {
+function getFormattedOrPlainFragmentFromClipboardData(
+  selectionController,
+  clipboardData,
+) {
   if (clipboardData.types.includes("text/html")) {
-    return getFormattedFragmentFromClipboardData(selectionController, clipboardData)
+    return getFormattedFragmentFromClipboardData(
+      selectionController,
+      clipboardData,
+    );
   } else if (clipboardData.types.includes("text/plain")) {
-    return getPlainFragmentFromClipboardData(selectionController, clipboardData)
+    return getPlainFragmentFromClipboardData(
+      selectionController,
+      clipboardData,
+    );
   }
-  return null
 }
 
 /**
@@ -71,18 +79,37 @@ export function paste(event, editor, selectionController) {
 
   let fragment = null;
   if (editor?.options?.allowHTMLPaste) {
-    fragment = getFragmentFromClipboardData(selectionController, event.clipboardData);
+    fragment = getFormattedOrPlainFragmentFromClipboardData(event.clipboardData);
   } else {
     fragment = getPlainFragmentFromClipboardData(selectionController, event.clipboardData);
   }
 
   if (!fragment) {
+    // NOOP
     return;
   }
 
   if (selectionController.isCollapsed) {
+    const hasOnlyOneParagraph = fragment.children.length === 1;
+    const hasOnlyOneTextSpan = fragment.firstElementChild.children.length === 1;
+    const forceTextSpan = fragment.firstElementChild.dataset.textSpan === "force";
+    if (hasOnlyOneParagraph
+     && hasOnlyOneTextSpan
+     && forceTextSpan) {
+      selectionController.insertIntoFocus(fragment.textContent);
+    } else {
       selectionController.insertPaste(fragment);
+    }
+  } else {
+    const hasOnlyOneParagraph = fragment.children.length === 1;
+    const hasOnlyOneTextSpan = fragment.firstElementChild.children.length === 1;
+    const forceTextSpan = fragment.firstElementChild.dataset.textSpan === "force";
+    if (hasOnlyOneParagraph
+     && hasOnlyOneTextSpan
+     && forceTextSpan) {
+      selectionController.replaceText(fragment.textContent);
     } else {
       selectionController.replaceWithPaste(fragment);
     }
   }
+}

frontend/text-editor/src/editor/content/dom/Content.js

@@ -230,14 +230,19 @@ export function mapContentFragmentFromString(string, styleDefaults) {
   const fragment = document.createDocumentFragment();
   for (const line of lines) {
     if (line === "") {
-      fragment.appendChild(createEmptyParagraph(styleDefaults));
-    } else {
       fragment.appendChild(
-        createParagraph(
-          [createTextSpan(new Text(line), styleDefaults)],
-          styleDefaults,
-        ),
+        createEmptyParagraph(styleDefaults)
       );
+    } else {
+      const textSpan = createTextSpan(new Text(line), styleDefaults);
+      const paragraph = createParagraph(
+        [textSpan],
+        styleDefaults,
+      );
+      if (lines.length === 1) {
+        paragraph.dataset.textSpan = "force";
+      }
+      fragment.appendChild(paragraph);
     }
   }
   return fragment;

frontend/text-editor/src/editor/content/dom/Style.js

@@ -6,6 +6,7 @@
  * Copyright (c) KALEIDOS INC
  */
 
+import StyleDeclaration from '../../controllers/StyleDeclaration.js';
 import { getFills } from "./Color.js";
 
 const DEFAULT_FONT_SIZE = "16px";
@@ -386,7 +387,8 @@ export function setStylesFromDeclaration(
  * @returns {HTMLElement}
  */
 export function setStyles(element, allowedStyles, styleObjectOrDeclaration) {
-  if (styleObjectOrDeclaration instanceof CSSStyleDeclaration) {
+  if (styleObjectOrDeclaration instanceof CSSStyleDeclaration
+   || styleObjectOrDeclaration instanceof StyleDeclaration) {
     return setStylesFromDeclaration(
       element,
       allowedStyles,
@@ -426,13 +428,15 @@ export function mergeStyles(allowedStyles, styleDeclaration, newStyles) {
   const mergedStyles = {};
   for (const [styleName, styleUnit] of allowedStyles) {
     if (styleName in newStyles) {
-      mergedStyles[styleName] = newStyles[styleName];
+      const styleValue = newStyles[styleName];
+      mergedStyles[styleName] = styleValue;
     } else {
-      mergedStyles[styleName] = getStyleFromDeclaration(
+      const styleValue = getStyleFromDeclaration(
         styleDeclaration,
         styleName,
         styleUnit,
       );
+      mergedStyles[styleName] = styleValue;
     }
   }
   return mergedStyles;

frontend/text-editor/src/editor/content/dom/TextNodeIterator.js

@@ -6,6 +6,8 @@
  * Copyright (c) KALEIDOS INC
  */
 
+import SafeGuard from '../../controllers/SafeGuard.js';
+
 /**
  * Iterator direction.
  *
@@ -245,6 +247,51 @@ export class TextNodeIterator {
     this.#currentNode = previousNode;
     return this.#currentNode;
   }
+
+  /**
+   * Returns an array of text nodes.
+   *
+   * @param {TextNode} startNode
+   * @param {TextNode} endNode
+   * @returns {Array<TextNode>}
+   */
+  collectFrom(startNode, endNode) {
+    const nodes = [];
+    for (const node of this.iterateFrom(startNode, endNode)) {
+      nodes.push(node);
+    }
+    return nodes;
+  }
+
+  /**
+   * Iterates over a list of nodes.
+   *
+   * @param {TextNode} startNode
+   * @param {TextNode} endNode
+   * @yields {TextNode}
+   */
+  * iterateFrom(startNode, endNode) {
+    const comparedPosition = startNode.compareDocumentPosition(
+      endNode
+    );
+    this.#currentNode = startNode;
+    SafeGuard.start();
+    while (this.#currentNode !== endNode) {
+      yield this.#currentNode;
+      SafeGuard.update();
+      if (comparedPosition === Node.DOCUMENT_POSITION_PRECEDING) {
+        if (!this.previousNode()) {
+          break;
+        }
+      } else if (comparedPosition === Node.DOCUMENT_POSITION_FOLLOWING) {
+        if (!this.nextNode()) {
+          break;
+        }
+      } else {
+        break;
+      }
+    }
+  }
 }
 
 export default TextNodeIterator;

frontend/text-editor/src/editor/controllers/SafeGuard.js

@@ -28,7 +28,20 @@ export function update() {
   }
 }
 
+let timeoutId = 0
+export function throwAfter(error, timeout = SAFE_GUARD_TIME) {
+  timeoutId = setTimeout(() => {
+    throw error
+  }, timeout)
+}
+
+export function throwCancel() {
+  clearTimeout(timeoutId)
+}
+
 export default {
   start,
   update,
-}
+  throwAfter,
+  throwCancel,
+};

frontend/text-editor/src/editor/controllers/SelectionController.js

@@ -54,6 +54,7 @@ import { isRoot, setRootStyles } from "../content/dom/Root.js";
 import { SelectionDirection } from "./SelectionDirection.js";
 import SafeGuard from "./SafeGuard.js";
 import { sanitizeFontFamily } from "../content/dom/Style.js";
+import StyleDeclaration from './StyleDeclaration.js';
 
 /**
  * Supported options for the SelectionController.
@@ -64,39 +65,7 @@ import { sanitizeFontFamily } from "../content/dom/Style.js";
 
 /**
  * SelectionController uses the same concepts used by the Selection API but extending it to support
- * our own internal model based on paragraphs (in drafconst textEditorMock = TextEditorMock.createTextEditorMockWithParagraphs([
-      createParagraph([createTextSpan(new Text("Hello, "))]),
-      createEmptyParagraph(),
-      createParagraph([createTextSpan(new Text("World!"))]),
-    ]);
-    const root = textEditorMock.root;
-    const selection = document.getSelection();
-    const selectionController = new SelectionController(
-      textEditorMock,
-      selection
-    );
-    focus(
-      selection,
-      textEditorMock,
-      root.childNodes.item(2).firstChild.firstChild,
-      0
-    );
-    selectionController.mergeBackwardParagraph();
-    expect(textEditorMock.root).toBeInstanceOf(HTMLDivElement);
-    expect(textEditorMock.root.children.length).toBe(2);
-    expect(textEditorMock.root.dataset.itype).toBe("root");
-    expect(textEditorMock.root.firstChild).toBeInstanceOf(HTMLDivElement);
-    expect(textEditorMock.root.firstChild.dataset.itype).toBe("paragraph");
-    expect(textEditorMock.root.firstChild.firstChild).toBeInstanceOf(
-      HTMLSpanElement
-    );
-    expect(textEditorMock.root.firstChild.firstChild.dataset.itype).toBe(
-      "span"
-    );
-    expect(textEditorMock.root.textContent).toBe("Hello, World!");
-    expect(textEditorMock.root.firstChild.textContent).toBe("Hello, ");
-    expect(textEditorMock.root.lastChild.textContent).toBe("World!");
-  t.js they were called blocks) and text spans.
+ * our own internal model based on paragraphs (in draft.js they were called blocks) and text spans.
  */
 export class SelectionController extends EventTarget {
   /**
@@ -164,21 +133,12 @@ export class SelectionController extends EventTarget {
   #textNodeIterator = null;
 
   /**
-   * CSSStyleDeclaration that we can mutate
+   * StyleDeclaration that we can mutate
    * to handle style changes.
    *
-   * @type {CSSStyleDeclaration}
+   * @type {StyleDeclaration}
    */
-  #currentStyle = null;
-
-  /**
-   * Element used to have a custom CSSStyleDeclaration
-   * that we can modify to handle style changes when the
-   * selection is changed.
-   *
-   * @type {HTMLDivElement}
-   */
-  #inertElement = null;
+  #currentStyle = new StyleDeclaration();
 
   /**
    * @type {SelectionControllerDebug}
@@ -275,19 +235,58 @@ export class SelectionController extends EventTarget {
    *
    * @param {HTMLElement} element
    */
-  #applyStylesToCurrentStyle(element) {
+  #applyStylesFromElementToCurrentStyle(element) {
     for (let index = 0; index < element.style.length; index++) {
       const styleName = element.style.item(index);
-
       let styleValue = element.style.getPropertyValue(styleName);
       if (styleName === "font-family") {
         styleValue = sanitizeFontFamily(styleValue);
       }
-
       this.#currentStyle.setProperty(styleName, styleValue);
     }
   }
 
+  /**
+   * Applies some styles to the currentStyle
+   * CSSStyleDeclaration
+   *
+   * @param {HTMLElement} element
+   */
+  #mergeStylesFromElementToCurrentStyle(element) {
+    for (let index = 0; index < element.style.length; index++) {
+      const styleName = element.style.item(index);
+      let styleValue = element.style.getPropertyValue(styleName);
+      if (styleName === "font-family") {
+        styleValue = sanitizeFontFamily(styleValue);
+      }
+      this.#currentStyle.mergeProperty(styleName, styleValue);
+    }
+  }
+
+  /**
+   * Updates current styles based on the currently selected text spans.
+   *
+   * @param {HTMLSpanElement} startNode
+   * @param {HTMLSpanElement} endNode
+   */
+  #updateCurrentStyleFrom(startNode, endNode) {
+    this.#applyDefaultStylesToCurrentStyle();
+    const root = startNode.parentElement.parentElement.parentElement;
+    this.#applyStylesFromElementToCurrentStyle(root);
+    // FIXME: I don't like this approximation. Having to iterate nodes twice
+    // is bad for performance. I think we need another way of "computing"
+    // the cascade.
+    for (const textNode of this.#textNodeIterator.iterateFrom(startNode, endNode)) {
+      const paragraph = textNode.parentElement.parentElement;
+      this.#applyStylesFromElementToCurrentStyle(paragraph);
+    }
+    for (const textNode of this.#textNodeIterator.iterateFrom(startNode, endNode)) {
+      const textSpan = textNode.parentElement;
+      this.#mergeStylesFromElementToCurrentStyle(textSpan);
+    }
+    return this;
+  }
+
   /**
    * Updates current styles based on the currently selected text span.
    *
@@ -297,20 +296,14 @@ export class SelectionController extends EventTarget {
   #updateCurrentStyle(textSpan) {
     this.#applyDefaultStylesToCurrentStyle();
     const root = textSpan.parentElement.parentElement;
-    this.#applyStylesToCurrentStyle(root);
+    this.#applyStylesFromElementToCurrentStyle(root);
     const paragraph = textSpan.parentElement;
-    this.#applyStylesToCurrentStyle(paragraph);
-    this.#applyStylesToCurrentStyle(textSpan);
+    this.#applyStylesFromElementToCurrentStyle(paragraph);
+    this.#applyStylesFromElementToCurrentStyle(textSpan);
     return this;
   }
 
-  /**
-   * This is called on every `selectionchange` because it is dispatched
-   * only by the `document` object.
-   *
-   * @param {Event} e
-   */
-  #onSelectionChange = (e) => {
+  #updateState() {
     // If we're outside the contenteditable element, then
     // we return.
     if (!this.hasFocus) {
@@ -320,17 +313,23 @@ export class SelectionController extends EventTarget {
     let focusNodeChanges = false;
     let anchorNodeChanges = false;
 
-    if (this.#focusNode !== this.#selection.focusNode) {
+    if (
+      this.#focusNode !== this.#selection.focusNode ||
+      this.#focusOffset !== this.#selection.focusOffset
+    ) {
       this.#focusNode = this.#selection.focusNode;
+      this.#focusOffset = this.#selection.focusOffset;
       focusNodeChanges = true;
     }
-    this.#focusOffset = this.#selection.focusOffset;
 
-    if (this.#anchorNode !== this.#selection.anchorNode) {
+    if (
+      this.#anchorNode !== this.#selection.anchorNode ||
+      this.#anchorOffset !== this.#selection.anchorOffset
+    ) {
       this.#anchorNode = this.#selection.anchorNode;
+      this.#anchorOffset = this.#selection.anchorOffset;
       anchorNodeChanges = true;
     }
-    this.#anchorOffset = this.#selection.anchorOffset;
 
     // We need to handle multi selection from firefox
     // and remove all the old ranges and just keep the
@@ -359,7 +358,7 @@ export class SelectionController extends EventTarget {
     // If focus node changed, we need to retrieve all the
     // styles of the current text span and dispatch an event
     // to notify that the styles have changed.
-    if (focusNodeChanges) {
+    if (focusNodeChanges || anchorNodeChanges) {
       this.#notifyStyleChange();
     }
 
@@ -372,43 +371,42 @@ export class SelectionController extends EventTarget {
     if (this.#debug) {
       this.#debug.update(this);
     }
-  };
+  }
+
+  /**
+   * This is called on every `selectionchange` because it is dispatched
+   * only by the `document` object.
+   *
+   * @param {Event} e
+   */
+  #onSelectionChange = (_) => this.#updateState();
 
   /**
    * Notifies that the styles have changed.
    */
   #notifyStyleChange() {
-    const textSpan = this.focusTextSpan;
-    if (textSpan) {
-      this.#updateCurrentStyle(textSpan);
-      this.dispatchEvent(
-        new CustomEvent("stylechange", {
-          detail: this.#currentStyle,
-        }),
-      );
-    } else {
-      const firstTextSpan =
+    if (this.#selection.isCollapsed) {
+      // CARET
+      const textSpan =
+        this.focusTextSpan ??
         this.#textEditor.root?.firstElementChild?.firstElementChild;
-      if (firstTextSpan) {
-        this.#updateCurrentStyle(firstTextSpan);
+
+      this.#updateCurrentStyle(textSpan);
+    } else {
+      // SELECTION.
+      this.#updateCurrentStyleFrom(this.#anchorNode, this.#focusNode);
+    }
     this.dispatchEvent(
       new CustomEvent("stylechange", {
         detail: this.#currentStyle,
       }),
     );
   }
-    }
-  }
 
   /**
    * Setups
    */
   #setup() {
-    // This element is not attached to the DOM
-    // so it doesn't trigger style or layout calculations.
-    // That's why it's called "inertElement".
-    this.#inertElement = document.createElement("div");
-    this.#currentStyle = this.#inertElement.style;
     this.#applyDefaultStylesToCurrentStyle();
 
     if (this.#selection.rangeCount > 0) {
@@ -428,6 +426,22 @@ export class SelectionController extends EventTarget {
     document.addEventListener("selectionchange", this.#onSelectionChange);
   }
 
+  /**
+   * Disposes the current resources.
+   */
+  dispose() {
+    document.removeEventListener("selectionchange", this.#onSelectionChange);
+    this.#textEditor = null;
+    this.#ranges.clear();
+    this.#ranges = null;
+    this.#range = null;
+    this.#selection = null;
+    this.#focusNode = null;
+    this.#anchorNode = null;
+    this.#mutations.dispose();
+    this.#mutations = null;
+  }
+
   /**
    * Returns a Range-like object.
    *
@@ -502,6 +516,8 @@ export class SelectionController extends EventTarget {
    * Marks the start of a mutation.
    *
    * Clears all the mutations kept in CommandMutations.
+   *
+   * @returns {boolean}
    */
   startMutation() {
     this.#mutations.clear();
@@ -512,7 +528,7 @@ export class SelectionController extends EventTarget {
   /**
    * Marks the end of a mutation.
    *
-   * @returns
+   * @returns {CommandMutations}
    */
   endMutation() {
     return this.#mutations;
@@ -520,6 +536,8 @@ export class SelectionController extends EventTarget {
 
   /**
    * Selects all content.
+   *
+   * @returns {SelectionController}
    */
   selectAll() {
     if (this.#textEditor.isEmpty) {
@@ -558,23 +576,15 @@ export class SelectionController extends EventTarget {
     this.#selection.removeAllRanges();
     this.#selection.addRange(range);
 
-    // Ensure internal state is synchronized
-    this.#focusNode = this.#selection.focusNode;
-    this.#focusOffset = this.#selection.focusOffset;
-    this.#anchorNode = this.#selection.anchorNode;
-    this.#anchorOffset = this.#selection.anchorOffset;
-    this.#range = range;
-    this.#ranges.clear();
-    this.#ranges.add(range);
-
-    // Notify style changes
-    this.#notifyStyleChange();
+    this.#updateState();
 
     return this;
   }
 
   /**
    * Moves cursor to end.
+   *
+   * @returns {SelectionController}
    */
   cursorToEnd() {
     const range = document.createRange(); //Create a range (a range is a like the selection but invisible)
@@ -662,22 +672,6 @@ export class SelectionController extends EventTarget {
     }
   }
 
-  /**
-   * Disposes the current resources.
-   */
-  dispose() {
-    document.removeEventListener("selectionchange", this.#onSelectionChange);
-    this.#textEditor = null;
-    this.#ranges.clear();
-    this.#ranges = null;
-    this.#range = null;
-    this.#selection = null;
-    this.#focusNode = null;
-    this.#anchorNode = null;
-    this.#mutations.dispose();
-    this.#mutations = null;
-  }
-
   /**
    * Returns the current selection.
    *
@@ -1114,8 +1108,8 @@ export class SelectionController extends EventTarget {
     return isParagraphEnd(this.focusNode, this.focusOffset);
   }
 
-  #getFragmentInlineTextNode(fragment) {
-    if (isInline(fragment.firstElementChild.lastChild)) {
+  #getFragmentTextSpanTextNode(fragment) {
+    if (isTextSpan(fragment.firstElementChild.lastChild)) {
       return fragment.firstElementChild.firstElementChild.lastChild;
     }
     return fragment.firstElementChild.lastChild;
@@ -1131,11 +1125,15 @@ export class SelectionController extends EventTarget {
    * @param {DocumentFragment} fragment
    */
   insertPaste(fragment) {
+    const hasOnlyOneParagraph = fragment.children.length === 1;
+    const forceTextSpan =
+      fragment.firstElementChild?.dataset?.textSpan === "force";
     if (
-      fragment.children.length === 1 &&
-      fragment.firstElementChild?.dataset?.textSpan === "force"
+      hasOnlyOneParagraph &&
+      forceTextSpan
     ) {
-      const collapseNode = fragment.firstElementChild.firstChild;
+      // first text span
+      const collapseNode = fragment.firstElementChild.firstElementChild;
       if (this.isTextSpanStart) {
         this.focusTextSpan.before(...fragment.firstElementChild.children);
       } else if (this.isTextSpanEnd) {
@@ -1147,7 +1145,9 @@ export class SelectionController extends EventTarget {
           newTextSpan,
         );
       }
-      return this.collapse(collapseNode, collapseNode.nodeValue?.length || 0);
+      // collapseNode could be a <br>, that's why we need to
+      // make `nodeValue` as optional.
+      return this.collapse(collapseNode, collapseNode?.nodeValue?.length || 0);
     }
     const collapseNode = this.#getFragmentParagraphTextNode(fragment);
     if (this.isParagraphStart) {
@@ -1393,9 +1393,16 @@ export class SelectionController extends EventTarget {
         this.focusOffset,
         newText,
       );
+      this.collapse(this.focusNode, this.focusOffset + newText.length);
     } else if (this.isLineBreakFocus) {
       const textNode = new Text(newText);
+      // the focus node is a <span>.
+      if (isTextSpan(this.focusNode)) {
+        this.focusNode.firstElementChild.replaceWith(textNode);
+      // the focus node is a <br>.
+      } else {
         this.focusNode.replaceWith(textNode);
+      }
       this.collapse(textNode, newText.length);
     } else {
       throw new Error("Unknown node type");

frontend/text-editor/src/editor/controllers/StyleDeclaration.js

@@ -0,0 +1,108 @@
+export class StyleDeclaration {
+  static Property = class Property {
+    static NULL = '["~#\'",null]';
+
+    static Default = new Property("", "", "");
+
+    name;
+    value = "";
+    priority = "";
+
+    constructor(name, value = "", priority = "") {
+      this.name = name;
+      this.value = value ?? "";
+      this.priority = priority ?? "";
+    }
+  };
+
+  #items = new Map();
+
+  get cssFloat() {
+    throw new Error("Not implemented");
+  }
+
+  get cssText() {
+    throw new Error("Not implemented");
+  }
+
+  get parentRule() {
+    throw new Error("Not implemented");
+  }
+
+  get length() {
+    return this.#items.size;
+  }
+
+  #getProperty(name) {
+    return this.#items.get(name) ?? StyleDeclaration.Property.Default;
+  }
+
+  getPropertyPriority(name) {
+    const { priority } = this.#getProperty(name);
+    return priority ?? "";
+  }
+
+  getPropertyValue(name) {
+    const { value } = this.#getProperty(name);
+    return value ?? "";
+  }
+
+  item(index) {
+    return Array.from(this.#items).at(index).name;
+  }
+
+  removeProperty(name) {
+    const value = this.getPropertyValue(name);
+    this.#items.delete(name);
+    return value;
+  }
+
+  setProperty(name, value, priority) {
+    this.#items.set(name, new StyleDeclaration.Property(name, value, priority));
+  }
+
+  /** Non compatible methods */
+  #isQuotedValue(a, b) {
+    if (a.startsWith('"') && b.startsWith('"')) {
+      return a === b;
+    } else if (a.startsWith('"') && !b.startsWith('"')) {
+      return a.slice(1, -1) === b;
+    } else if (!a.startsWith('"') && b.startsWith('"')) {
+      return a === b.slice(1, -1);
+    }
+    return a === b;
+  }
+
+  mergeProperty(name, value) {
+    const currentValue = this.getPropertyValue(name);
+    if (this.#isQuotedValue(currentValue, value)) {
+      return this.setProperty(name, value);
+    } else if (currentValue === "" && value === StyleDeclaration.Property.NULL) {
+      return this.setProperty(name, value);
+    } else if (currentValue === "" && ["initial", "none"].includes(value)) {
+      return this.setProperty(name, value);
+    } else if (currentValue !== value) {
+      return this.setProperty(name, "mixed");
+    }
+  }
+
+  fromCSSStyleDeclaration(cssStyleDeclaration) {
+    for (let index = 0; index < cssStyleDeclaration.length; index++) {
+      const name = cssStyleDeclaration.item(index);
+      const value = cssStyleDeclaration.getPropertyValue(name);
+      const priority = cssStyleDeclaration.getPropertyPriority(name);
+      this.setProperty(name, value, priority);
+    }
+  }
+
+  toObject() {
+    return Object.fromEntries(
+      Array.from(this.#items.entries(), ([name, property]) => [
+        name,
+        property.value,
+      ]),
+    );
+  }
+}
+
+export default StyleDeclaration

frontend/text-editor/src/editor/controllers/StyleDeclaration.test.js

@@ -0,0 +1,32 @@
+import { describe, test, expect } from "vitest";
+import { StyleDeclaration } from "./StyleDeclaration.js";
+
+describe("StyleDeclaration", () => {
+  test("Create a new StyleDeclaration", () => {
+    const styleDeclaration = new StyleDeclaration();
+    expect(styleDeclaration).toBeInstanceOf(StyleDeclaration);
+  });
+
+  test("Uninmplemented getters should throw", () => {
+    expect(() => styleDeclaration.cssFloat).toThrow();
+    expect(() => styleDeclaration.cssText).toThrow();
+    expect(() => styleDeclaration.parentRule).toThrow();
+  });
+
+  test("Set property", () => {
+    const styleDeclaration = new StyleDeclaration();
+    styleDeclaration.setProperty("line-height", "1.2");
+    expect(styleDeclaration.getPropertyValue("line-height")).toBe("1.2");
+    expect(styleDeclaration.getPropertyPriority("line-height")).toBe("");
+  });
+
+  test("Remove property", () => {
+    const styleDeclaration = new StyleDeclaration();
+    styleDeclaration.setProperty("line-height", "1.2");
+    expect(styleDeclaration.getPropertyValue("line-height")).toBe("1.2");
+    expect(styleDeclaration.getPropertyPriority("line-height")).toBe("");
+    styleDeclaration.removeProperty("line-height");
+    expect(styleDeclaration.getPropertyValue("line-height")).toBe("");
+    expect(styleDeclaration.getPropertyPriority("line-height")).toBe("");
+  });
+});