793e7dd01b
When the selected text on a page changes, update the system selection clipboard on supported systems (if primary pasting is enabled).
69 lines
2.6 KiB
C++
69 lines
2.6 KiB
C++
/*
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* Copyright (c) 2024, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <LibWeb/DOM/Document.h>
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#include <LibWeb/DOM/Event.h>
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#include <LibWeb/DOM/EventTarget.h>
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#include <LibWeb/HTML/EventNames.h>
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#include <LibWeb/HTML/Navigable.h>
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#include <LibWeb/Page/Page.h>
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namespace Web::DOM {
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// https://w3c.github.io/selection-api/#dfn-has-scheduled-selectionchange-event
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template<typename T>
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concept SelectionChangeTarget = DerivedFrom<T, EventTarget> && requires(T t) {
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{ t.has_scheduled_selectionchange_event() } -> SameAs<bool>;
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{ t.set_scheduled_selectionchange_event(bool()) } -> SameAs<void>;
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};
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// https://w3c.github.io/selection-api/#scheduling-selectionchange-event
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template<SelectionChangeTarget T>
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void schedule_a_selectionchange_event(T& target, Document& document)
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{
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// 1. If target's has scheduled selectionchange event is true, abort these steps.
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if (target.has_scheduled_selectionchange_event())
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return;
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// AD-HOC: See https://github.com/w3c/selection-api/issues/338
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// Set target's has scheduled selectionchange event to true
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target.set_scheduled_selectionchange_event(true);
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// 2. Queue a task on the user interaction task source to fire a selectionchange event on
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// target.
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queue_global_task(HTML::Task::Source::UserInteraction, relevant_global_object(document), GC::create_function(document.heap(), [&] {
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fire_a_selectionchange_event(target, document);
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}));
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}
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// https://w3c.github.io/selection-api/#firing-selectionchange-event
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template<SelectionChangeTarget T>
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void fire_a_selectionchange_event(T& target, Document& document)
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{
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// 1. Set target's has scheduled selectionchange event to false.
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target.set_scheduled_selectionchange_event(false);
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// 2. If target is an element, fire an event named selectionchange, which bubbles and not
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// cancelable, at target.
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// 3. Otherwise, if target is a document, fire an event named selectionchange, which does not
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// bubble and not cancelable, at target.
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Bindings::EventInit event_init;
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event_init.bubbles = DerivedFrom<T, Element>;
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event_init.cancelable = false;
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auto event = DOM::Event::create(document.realm(), HTML::EventNames::selectionchange, event_init);
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target.dispatch_event(event);
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// AD-HOC: When the selection changes, inform the UI to update the primary pasteboard.
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if (auto& page = document.page(); page.enable_primary_paste()) {
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if (auto text = page.focused_navigable().selected_text(); !text.is_empty())
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page.client().page_did_update_primary_selection(text);
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}
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}
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}
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