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LibWeb: Implement setRangeText for input and textarea elements
This method replaces range of text in its respective element with a new string
This commit is contained in:
Tim Ledbetter
Andreas Kling
parent
206262cd55
commit
2f5b070716
Notes:
github-actions[bot]
2024-08-31 09:50:48 +00:00
Author: https://github.com/tcl3
Commit: 2f5b070716
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/1223
Reviewed-by: https://github.com/awesomekling
10 changed files with 217 additions and 4 deletions
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@ -1,6 +1,7 @@
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/*
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* Copyright (c) 2021, Andreas Kling <kling@serenityos.org>
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* Copyright (c) 2024, Jelle Raaijmakers <jelle@gmta.nl>
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* Copyright (c) 2024, Tim Ledbetter <tim.ledbetter@ladybird.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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@ -345,6 +346,132 @@ void FormAssociatedTextControlElement::set_selection_direction(Optional<String>
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m_selection_direction = string_to_selection_direction(direction);
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}
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// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-textarea/input-setrangetext
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WebIDL::ExceptionOr<void> FormAssociatedTextControlElement::set_range_text(String const& replacement)
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{
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return set_range_text(replacement, m_selection_start, m_selection_end);
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}
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// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-textarea/input-setrangetext
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WebIDL::ExceptionOr<void> FormAssociatedTextControlElement::set_range_text(String const& replacement, WebIDL::UnsignedLong start, WebIDL::UnsignedLong end, Bindings::SelectionMode selection_mode)
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{
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// 1. If this element is an input element, and setRangeText() does not apply to this element,
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// throw an "InvalidStateError" DOMException.
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auto& html_element = form_associated_element_to_html_element();
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if (is<HTMLInputElement>(html_element) && !static_cast<HTMLInputElement&>(html_element).selection_or_range_applies())
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return WebIDL::InvalidStateError::create(html_element.realm(), "setRangeText does not apply to this input type"_fly_string);
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// 2. Set this element's dirty value flag to true.
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set_dirty_value_flag(true);
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// 3. If the method has only one argument, then let start and end have the values of the selectionStart attribute and the selectionEnd attribute respectively.
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// Otherwise, let start, end have the values of the second and third arguments respectively.
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// NOTE: This is handled by the caller.
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// 4. If start is greater than end, then throw an "IndexSizeError" DOMException.
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if (start > end)
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return WebIDL::IndexSizeError::create(html_element.realm(), "The start argument must be less than or equal to the end argument"_fly_string);
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// 5. If start is greater than the length of the relevant value of the text control, then set it to the length of the relevant value of the text control.
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auto the_relevant_value = relevant_value();
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auto relevant_value_length = the_relevant_value.code_points().length();
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if (start > relevant_value_length)
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start = relevant_value_length;
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// 6. If end is greater than the length of the relevant value of the text control, then set it to the length of the relevant value of the text control.
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if (end > relevant_value_length)
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end = relevant_value_length;
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// 7. Let selection start be the current value of the selectionStart attribute.
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auto selection_start = m_selection_start;
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// 8. Let selection end be the current value of the selectionEnd attribute.
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auto selection_end = m_selection_end;
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// 9. If start is less than end, delete the sequence of code units within the element's relevant value starting with
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// the code unit at the startth position and ending with the code unit at the (end-1)th position.
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if (start < end) {
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StringBuilder builder;
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auto before_removal_point_view = the_relevant_value.code_points().unicode_substring_view(0, start);
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builder.append(before_removal_point_view.as_string());
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auto after_removal_point_view = the_relevant_value.code_points().unicode_substring_view(end);
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builder.append(after_removal_point_view.as_string());
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the_relevant_value = MUST(builder.to_string());
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}
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// 10. Insert the value of the first argument into the text of the relevant value of the text control, immediately before the startth code unit.
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StringBuilder builder;
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auto before_insertion_point_view = the_relevant_value.code_points().unicode_substring_view(0, start);
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builder.append(before_insertion_point_view.as_string());
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builder.append(replacement);
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auto after_insertion_point_view = the_relevant_value.code_points().unicode_substring_view(start);
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builder.append(after_insertion_point_view.as_string());
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the_relevant_value = MUST(builder.to_string());
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TRY(set_relevant_value(the_relevant_value));
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// 11. Let new length be the length of the value of the first argument.
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i64 new_length = replacement.code_points().length();
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// 12. Let new end be the sum of start and new length.
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auto new_end = start + new_length;
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// 13. Run the appropriate set of substeps from the following list:
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switch (selection_mode) {
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// If the fourth argument's value is "select"
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case Bindings::SelectionMode::Select:
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// Let selection start be start.
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selection_start = start;
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// Let selection end be new end.
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selection_end = new_end;
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break;
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// If the fourth argument's value is "start"
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case Bindings::SelectionMode::Start:
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// Let selection start and selection end be start.
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selection_start = start;
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selection_end = start;
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break;
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// If the fourth argument's value is "end"
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case Bindings::SelectionMode::End:
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selection_start = new_end;
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selection_end = new_end;
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break;
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// If the fourth argument's value is "preserve"
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case Bindings::SelectionMode::Preserve:
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// 1. Let old length be end minus start.
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auto old_length = end - start;
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// 2. Let delta be new length minus old length.
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auto delta = new_length - old_length;
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// 3. If selection start is greater than end, then increment it by delta.
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// (If delta is negative, i.e. the new text is shorter than the old text, then this will decrease the value of selection start.)
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// Otherwise: if selection start is greater than start, then set it to start.
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// (This snaps the start of the selection to the start of the new text if it was in the middle of the text that it replaced.)
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if (selection_start > end)
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selection_start += delta;
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else if (selection_start > start)
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selection_start = start;
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// 4. If selection end is greater than end, then increment it by delta in the same way.
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// Otherwise: if selection end is greater than start, then set it to new end.
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// (This snaps the end of the selection to the end of the new text if it was in the middle of the text that it replaced.)
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if (selection_end > end)
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selection_end += delta;
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else if (selection_end > start)
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selection_end = new_end;
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break;
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}
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// 14. Set the selection range with selection start and selection end.
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set_the_selection_range(selection_start, selection_end);
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return {};
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}
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// https://html.spec.whatwg.org/multipage/form-control-infrastructure.html#dom-textarea/input-setselectionrange
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WebIDL::ExceptionOr<void> FormAssociatedTextControlElement::set_selection_range(Optional<WebIDL::UnsignedLong> start, Optional<WebIDL::UnsignedLong> end, Optional<String> direction)
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{
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