From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Fri, 19 Apr 2024 02:47:55 +0200
Subject: Adding upstream version 124.0.1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../actors/SelectionActionDelegateChild.sys.mjs    | 442 +++++++++++++++++++++
 1 file changed, 442 insertions(+)
 create mode 100644 mobile/android/actors/SelectionActionDelegateChild.sys.mjs

(limited to 'mobile/android/actors/SelectionActionDelegateChild.sys.mjs')

diff --git a/mobile/android/actors/SelectionActionDelegateChild.sys.mjs b/mobile/android/actors/SelectionActionDelegateChild.sys.mjs
new file mode 100644
index 0000000000..9f05906e09
--- /dev/null
+++ b/mobile/android/actors/SelectionActionDelegateChild.sys.mjs
@@ -0,0 +1,442 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+import { GeckoViewActorChild } from "resource://gre/modules/GeckoViewActorChild.sys.mjs";
+
+const lazy = {};
+
+ChromeUtils.defineESModuleGetters(lazy, {
+  LayoutUtils: "resource://gre/modules/LayoutUtils.sys.mjs",
+});
+
+const MAGNIFIER_PREF = "layout.accessiblecaret.magnifier.enabled";
+const ACCESSIBLECARET_HEIGHT_PREF = "layout.accessiblecaret.height";
+const PREFS = [MAGNIFIER_PREF, ACCESSIBLECARET_HEIGHT_PREF];
+
+// Dispatches GeckoView:ShowSelectionAction and GeckoView:HideSelectionAction to
+// the GeckoSession on accessible caret changes.
+export class SelectionActionDelegateChild extends GeckoViewActorChild {
+  constructor(aModuleName, aMessageManager) {
+    super(aModuleName, aMessageManager);
+
+    this._actionCallback = () => {};
+    this._isActive = false;
+    this._previousMessage = "";
+
+    // Bug 1570744 - JSWindowActorChild's cannot be used as nsIObserver's
+    // directly, so we create a new function here instead to act as our
+    // nsIObserver, which forwards the notification to the observe method.
+    this._observerFunction = (subject, topic, data) => {
+      this.observe(subject, topic, data);
+    };
+    for (const pref of PREFS) {
+      Services.prefs.addObserver(pref, this._observerFunction);
+    }
+
+    this._magnifierEnabled = Services.prefs.getBoolPref(MAGNIFIER_PREF);
+    this._accessiblecaretHeight = parseFloat(
+      Services.prefs.getCharPref(ACCESSIBLECARET_HEIGHT_PREF, "0")
+    );
+  }
+
+  didDestroy() {
+    for (const pref of PREFS) {
+      Services.prefs.removeObserver(pref, this._observerFunction);
+    }
+  }
+
+  _actions = [
+    {
+      id: "org.mozilla.geckoview.HIDE",
+      predicate: _ => true,
+      perform: _ => this.handleEvent({ type: "pagehide" }),
+    },
+    {
+      id: "org.mozilla.geckoview.CUT",
+      predicate: e =>
+        !e.collapsed && e.selectionEditable && !this._isPasswordField(e),
+      perform: _ => this.docShell.doCommand("cmd_cut"),
+    },
+    {
+      id: "org.mozilla.geckoview.COPY",
+      predicate: e => !e.collapsed && !this._isPasswordField(e),
+      perform: _ => this.docShell.doCommand("cmd_copy"),
+    },
+    {
+      id: "org.mozilla.geckoview.PASTE",
+      predicate: e =>
+        (this._isContentHtmlEditable(e) &&
+          Services.clipboard.hasDataMatchingFlavors(
+            /* The following image types are considered by editor */
+            ["image/gif", "image/jpeg", "image/png"],
+            Ci.nsIClipboard.kGlobalClipboard
+          )) ||
+        (e.selectionEditable &&
+          Services.clipboard.hasDataMatchingFlavors(
+            ["text/plain"],
+            Ci.nsIClipboard.kGlobalClipboard
+          )),
+      perform: _ => this._performPaste(),
+    },
+    {
+      id: "org.mozilla.geckoview.PASTE_AS_PLAIN_TEXT",
+      predicate: e =>
+        this._isContentHtmlEditable(e) &&
+        Services.clipboard.hasDataMatchingFlavors(
+          ["text/html"],
+          Ci.nsIClipboard.kGlobalClipboard
+        ),
+      perform: _ => this._performPasteAsPlainText(),
+    },
+    {
+      id: "org.mozilla.geckoview.DELETE",
+      predicate: e => !e.collapsed && e.selectionEditable,
+      perform: _ => this.docShell.doCommand("cmd_delete"),
+    },
+    {
+      id: "org.mozilla.geckoview.COLLAPSE_TO_START",
+      predicate: e => !e.collapsed && e.selectionEditable,
+      perform: e => this.docShell.doCommand("cmd_moveLeft"),
+    },
+    {
+      id: "org.mozilla.geckoview.COLLAPSE_TO_END",
+      predicate: e => !e.collapsed && e.selectionEditable,
+      perform: e => this.docShell.doCommand("cmd_moveRight"),
+    },
+    {
+      id: "org.mozilla.geckoview.UNSELECT",
+      predicate: e => !e.collapsed && !e.selectionEditable,
+      perform: e => this.docShell.doCommand("cmd_selectNone"),
+    },
+    {
+      id: "org.mozilla.geckoview.SELECT_ALL",
+      predicate: e => {
+        if (e.reason === "longpressonemptycontent") {
+          return false;
+        }
+        // When on design mode, focusedElement will be null.
+        const element =
+          Services.focus.focusedElement || e.target?.activeElement;
+        if (e.selectionEditable && e.target && element) {
+          let value = "";
+          if (element.value) {
+            value = element.value;
+          } else if (
+            element.isContentEditable ||
+            e.target.designMode === "on"
+          ) {
+            value = element.innerText;
+          }
+          // Do not show SELECT_ALL if the editable is empty
+          // or all the editable text is already selected.
+          return value !== "" && value !== e.selectedTextContent;
+        }
+        return true;
+      },
+      perform: e => this.docShell.doCommand("cmd_selectAll"),
+    },
+  ];
+
+  receiveMessage({ name, data }) {
+    debug`receiveMessage ${name}`;
+
+    switch (name) {
+      case "ExecuteSelectionAction": {
+        this._actionCallback(data);
+      }
+    }
+  }
+
+  _performPaste() {
+    this.handleEvent({ type: "pagehide" });
+    this.docShell.doCommand("cmd_paste");
+  }
+
+  _performPasteAsPlainText() {
+    this.handleEvent({ type: "pagehide" });
+    this.docShell.doCommand("cmd_pasteNoFormatting");
+  }
+
+  _isPasswordField(aEvent) {
+    if (!aEvent.selectionEditable) {
+      return false;
+    }
+
+    const win = aEvent.target.defaultView;
+    const focus = aEvent.target.activeElement;
+    return (
+      win &&
+      win.HTMLInputElement &&
+      win.HTMLInputElement.isInstance(focus) &&
+      !focus.mozIsTextField(/* excludePassword */ true)
+    );
+  }
+
+  _isContentHtmlEditable(aEvent) {
+    if (!aEvent.selectionEditable) {
+      return false;
+    }
+
+    if (aEvent.target.designMode == "on") {
+      return true;
+    }
+
+    // focused element isn't <input> nor <textarea>
+    const win = aEvent.target.defaultView;
+    const focus = Services.focus.focusedElement;
+    return (
+      win &&
+      win.HTMLInputElement &&
+      win.HTMLTextAreaElement &&
+      !win.HTMLInputElement.isInstance(focus) &&
+      !win.HTMLTextAreaElement.isInstance(focus)
+    );
+  }
+
+  _getDefaultMagnifierPoint(aEvent) {
+    const rect = lazy.LayoutUtils.rectToScreenRect(aEvent.target.ownerGlobal, {
+      left: aEvent.clientX,
+      top: aEvent.clientY - this._accessiblecaretHeight,
+      width: 0,
+      height: 0,
+    });
+    return { x: rect.left, y: rect.top };
+  }
+
+  _getBetterMagnifierPoint(aEvent) {
+    const win = aEvent.target.defaultView;
+    if (!win) {
+      return this._getDefaultMagnifierPoint(aEvent);
+    }
+
+    const focus = aEvent.target.activeElement;
+    if (
+      win.HTMLInputElement?.isInstance(focus) &&
+      focus.mozIsTextField(false)
+    ) {
+      // <input> element. Use vertical center position of input element.
+      const bounds = focus.getBoundingClientRect();
+      const rect = lazy.LayoutUtils.rectToScreenRect(
+        aEvent.target.ownerGlobal,
+        {
+          left: aEvent.clientX,
+          top: bounds.top,
+          width: 0,
+          height: bounds.height,
+        }
+      );
+      return { x: rect.left, y: rect.top + rect.height / 2 };
+    }
+
+    if (win.HTMLTextAreaElement?.isInstance(focus)) {
+      // TODO:
+      // <textarea> element. How to get better selection bounds?
+      return this._getDefaultMagnifierPoint(aEvent);
+    }
+
+    const selection = win.getSelection();
+    if (selection.rangeCount != 1) {
+      // When selecting text using accessible caret, selection count will be 1.
+      // This situation means that current selection isn't into text.
+      return this._getDefaultMagnifierPoint(aEvent);
+    }
+
+    // We are looking for better selection bounds, then use it.
+    const bounds = (() => {
+      const range = selection.getRangeAt(0);
+      let distance = Number.MAX_SAFE_INTEGER;
+      let y = aEvent.clientY;
+      const rectList = range.getClientRects();
+      for (const rect of rectList) {
+        const newDistance = Math.abs(aEvent.clientY - rect.bottom);
+        if (distance > newDistance) {
+          y = rect.top + rect.height / 2;
+          distance = newDistance;
+        }
+      }
+      return { left: aEvent.clientX, top: y, width: 0, height: 0 };
+    })();
+
+    const rect = lazy.LayoutUtils.rectToScreenRect(
+      aEvent.target.ownerGlobal,
+      bounds
+    );
+    return { x: rect.left, y: rect.top };
+  }
+
+  _handleMagnifier(aEvent) {
+    if (["presscaret", "dragcaret"].includes(aEvent.reason)) {
+      debug`_handleMagnifier: ${aEvent.reason}`;
+      const screenPoint = this._getBetterMagnifierPoint(aEvent);
+      this.eventDispatcher.sendRequest({
+        type: "GeckoView:ShowMagnifier",
+        screenPoint,
+      });
+    } else if (aEvent.reason == "releasecaret") {
+      debug`_handleMagnifier: ${aEvent.reason}`;
+      this.eventDispatcher.sendRequest({
+        type: "GeckoView:HideMagnifier",
+      });
+    }
+  }
+
+  /**
+   * Receive and act on AccessibleCarets caret state-change
+   * (mozcaretstatechanged and pagehide) events.
+   */
+  handleEvent(aEvent) {
+    if (aEvent.type === "pagehide" || aEvent.type === "deactivate") {
+      // Hide any selection actions on page hide or deactivate.
+      aEvent = {
+        reason: "visibilitychange",
+        caretVisibile: false,
+        selectionVisible: false,
+        collapsed: true,
+        selectionEditable: false,
+      };
+    }
+
+    let reason = aEvent.reason;
+
+    if (this._isActive && !aEvent.caretVisible) {
+      // For mozcaretstatechanged, "visibilitychange" means the caret is hidden.
+      reason = "visibilitychange";
+    } else if (!aEvent.collapsed && !aEvent.selectionVisible) {
+      reason = "invisibleselection";
+    } else if (
+      !this._isActive &&
+      aEvent.selectionEditable &&
+      aEvent.collapsed &&
+      reason !== "longpressonemptycontent" &&
+      reason !== "taponcaret" &&
+      !Services.prefs.getBoolPref(
+        "geckoview.selection_action.show_on_focus",
+        false
+      )
+    ) {
+      // Don't show selection actions when merely focusing on an editor or
+      // repositioning the cursor. Wait until long press or the caret is tapped
+      // in order to match Android behavior.
+      reason = "visibilitychange";
+    }
+
+    debug`handleEvent: ${reason}`;
+
+    if (this._magnifierEnabled) {
+      this._handleMagnifier(aEvent);
+    }
+
+    if (
+      [
+        "longpressonemptycontent",
+        "releasecaret",
+        "taponcaret",
+        "updateposition",
+      ].includes(reason)
+    ) {
+      const actions = this._actions.filter(action =>
+        action.predicate.call(this, aEvent)
+      );
+
+      const screenRect = (() => {
+        const boundingRect = aEvent.boundingClientRect;
+        if (!boundingRect) {
+          return null;
+        }
+        const rect = lazy.LayoutUtils.rectToScreenRect(
+          aEvent.target.ownerGlobal,
+          boundingRect
+        );
+        return {
+          left: rect.left,
+          top: rect.top,
+          right: rect.right,
+          bottom: rect.bottom + this._accessiblecaretHeight,
+        };
+      })();
+
+      const password = this._isPasswordField(aEvent);
+
+      const msg = {
+        collapsed: aEvent.collapsed,
+        editable: aEvent.selectionEditable,
+        password,
+        selection: password ? "" : aEvent.selectedTextContent,
+        screenRect,
+        actions: actions.map(action => action.id),
+      };
+
+      if (this._isActive && JSON.stringify(msg) === this._previousMessage) {
+        // Don't call again if we're already active and things haven't changed.
+        return;
+      }
+
+      this._isActive = true;
+      this._previousMessage = JSON.stringify(msg);
+
+      // We can't just listen to the response of the message because we accept
+      // multiple callbacks.
+      this._actionCallback = data => {
+        const action = actions.find(action => action.id === data.id);
+        if (action) {
+          debug`Performing ${data.id}`;
+          action.perform.call(this, aEvent);
+        } else {
+          warn`Invalid action ${data.id}`;
+        }
+      };
+      this.sendAsyncMessage("ShowSelectionAction", msg);
+    } else if (
+      [
+        "invisibleselection",
+        "presscaret",
+        "scroll",
+        "visibilitychange",
+      ].includes(reason)
+    ) {
+      if (!this._isActive) {
+        return;
+      }
+      this._isActive = false;
+
+      // Mark previous actions as stale. Don't do this for "invisibleselection"
+      // or "scroll" because previous actions should still be valid even after
+      // these events occur.
+      if (reason !== "invisibleselection" && reason !== "scroll") {
+        this._seqNo++;
+      }
+
+      this.sendAsyncMessage("HideSelectionAction", { reason });
+    } else if (reason == "dragcaret") {
+      // nothing for selection action
+    } else {
+      warn`Unknown reason: ${reason}`;
+    }
+  }
+
+  observe(aSubject, aTopic, aData) {
+    if (aTopic != "nsPref:changed") {
+      return;
+    }
+
+    switch (aData) {
+      case ACCESSIBLECARET_HEIGHT_PREF:
+        this._accessiblecaretHeight = parseFloat(
+          Services.prefs.getCharPref(ACCESSIBLECARET_HEIGHT_PREF, "0")
+        );
+        break;
+      case MAGNIFIER_PREF:
+        this._magnifierEnabled = Services.prefs.getBoolPref(MAGNIFIER_PREF);
+        break;
+    }
+    // Reset magnifier
+    this.eventDispatcher.sendRequest({
+      type: "GeckoView:HideMagnifier",
+    });
+  }
+}
+
+const { debug, warn } = SelectionActionDelegateChild.initLogging(
+  "SelectionActionDelegate"
+);
-- 
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