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Diffstat (limited to '')
| -rw-r--r-- | toolkit/content/widgets/button.js | 312 |
1 files changed, 312 insertions, 0 deletions
diff --git a/toolkit/content/widgets/button.js b/toolkit/content/widgets/button.js new file mode 100644 index 0000000000..ce48fac1e9 --- /dev/null +++ b/toolkit/content/widgets/button.js @@ -0,0 +1,312 @@ +/* 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/. */ + +"use strict"; + +// This is loaded into all XUL windows. Wrap in a block to prevent +// leaking to window scope. +{ + class MozButtonBase extends MozElements.BaseText { + constructor() { + super(); + + /** + * While it would seem we could do this by handling oncommand, we can't + * because any external oncommand handlers might get called before ours, + * and then they would see the incorrect value of checked. Additionally + * a command attribute would redirect the command events anyway. + */ + this.addEventListener("click", event => { + if (event.button != 0) { + return; + } + this._handleClick(); + }); + + this.addEventListener("keypress", event => { + if (event.key != " ") { + return; + } + this._handleClick(); + // Prevent page from scrolling on the space key. + event.preventDefault(); + }); + + this.addEventListener("keypress", event => { + if (this.hasMenu()) { + if (this.open) { + return; + } + } else if (!this.inRichListItem) { + if ( + event.keyCode == KeyEvent.DOM_VK_UP || + (event.keyCode == KeyEvent.DOM_VK_LEFT && + document.defaultView.getComputedStyle(this.parentNode) + .direction == "ltr") || + (event.keyCode == KeyEvent.DOM_VK_RIGHT && + document.defaultView.getComputedStyle(this.parentNode) + .direction == "rtl") + ) { + event.preventDefault(); + window.document.commandDispatcher.rewindFocus(); + return; + } + + if ( + event.keyCode == KeyEvent.DOM_VK_DOWN || + (event.keyCode == KeyEvent.DOM_VK_RIGHT && + document.defaultView.getComputedStyle(this.parentNode) + .direction == "ltr") || + (event.keyCode == KeyEvent.DOM_VK_LEFT && + document.defaultView.getComputedStyle(this.parentNode) + .direction == "rtl") + ) { + event.preventDefault(); + window.document.commandDispatcher.advanceFocus(); + return; + } + } + + if ( + event.keyCode || + event.charCode <= 32 || + event.altKey || + event.ctrlKey || + event.metaKey + ) { + return; + } // No printable char pressed, not a potential accesskey + + // Possible accesskey pressed + var charPressedLower = String.fromCharCode( + event.charCode + ).toLowerCase(); + + // If the accesskey of the current button is pressed, just activate it + if (this.accessKey.toLowerCase() == charPressedLower) { + this.click(); + return; + } + + // Search for accesskey in the list of buttons for this doc and each subdoc + // Get the buttons for the main document and all sub-frames + for ( + var frameCount = -1; + frameCount < window.top.frames.length; + frameCount++ + ) { + var doc = + frameCount == -1 + ? window.top.document + : window.top.frames[frameCount].document; + if (this.fireAccessKeyButton(doc.documentElement, charPressedLower)) { + return; + } + } + + // Test dialog buttons + let buttonBox = window.top.document.querySelector("dialog")?.buttonBox; + if (buttonBox) { + this.fireAccessKeyButton(buttonBox, charPressedLower); + } + }); + } + + set type(val) { + this.setAttribute("type", val); + } + + get type() { + return this.getAttribute("type"); + } + + set disabled(val) { + if (val) { + this.setAttribute("disabled", "true"); + } else { + this.removeAttribute("disabled"); + } + } + + get disabled() { + return this.getAttribute("disabled") == "true"; + } + + set group(val) { + this.setAttribute("group", val); + } + + get group() { + return this.getAttribute("group"); + } + + set open(val) { + if (this.hasMenu()) { + this.openMenu(val); + } else if (val) { + // Fall back to just setting the attribute + this.setAttribute("open", "true"); + } else { + this.removeAttribute("open"); + } + } + + get open() { + return this.hasAttribute("open"); + } + + set checked(val) { + if (this.type == "radio" && val) { + var sibs = this.parentNode.getElementsByAttribute("group", this.group); + for (var i = 0; i < sibs.length; ++i) { + sibs[i].removeAttribute("checked"); + } + } + + if (val) { + this.setAttribute("checked", "true"); + } else { + this.removeAttribute("checked"); + } + } + + get checked() { + return this.hasAttribute("checked"); + } + + filterButtons(node) { + // if the node isn't visible, don't descend into it. + var cs = node.ownerGlobal.getComputedStyle(node); + if (cs.visibility != "visible" || cs.display == "none") { + return NodeFilter.FILTER_REJECT; + } + // but it may be a popup element, in which case we look at "state"... + if (XULPopupElement.isInstance(node) && node.state != "open") { + return NodeFilter.FILTER_REJECT; + } + // OK - the node seems visible, so it is a candidate. + if (node.localName == "button" && node.accessKey && !node.disabled) { + return NodeFilter.FILTER_ACCEPT; + } + return NodeFilter.FILTER_SKIP; + } + + fireAccessKeyButton(aSubtree, aAccessKeyLower) { + var iterator = aSubtree.ownerDocument.createTreeWalker( + aSubtree, + NodeFilter.SHOW_ELEMENT, + this.filterButtons + ); + while (iterator.nextNode()) { + var test = iterator.currentNode; + if ( + test.accessKey.toLowerCase() == aAccessKeyLower && + !test.disabled && + !test.collapsed && + !test.hidden + ) { + test.focus(); + test.click(); + return true; + } + } + return false; + } + + _handleClick() { + if (!this.disabled) { + if (this.type == "checkbox") { + this.checked = !this.checked; + } else if (this.type == "radio") { + this.checked = true; + } + } + } + } + + MozXULElement.implementCustomInterface(MozButtonBase, [ + Ci.nsIDOMXULButtonElement, + ]); + + MozElements.ButtonBase = MozButtonBase; + + class MozButton extends MozButtonBase { + static get inheritedAttributes() { + return { + ".box-inherit": "align,dir,pack,orient", + ".button-icon": "src=image", + ".button-text": "value=label,accesskey,crop", + ".button-menu-dropmarker": "open,disabled,label", + }; + } + + get icon() { + return this.querySelector(".button-icon"); + } + + static get buttonFragment() { + let frag = document.importNode( + MozXULElement.parseXULToFragment(` + <hbox class="box-inherit button-box" align="center" pack="center" flex="1" anonid="button-box"> + <image class="button-icon"/> + <label class="button-text"/> + </hbox>`), + true + ); + Object.defineProperty(this, "buttonFragment", { value: frag }); + return frag; + } + + static get menuFragment() { + let frag = document.importNode( + MozXULElement.parseXULToFragment(` + <hbox class="box-inherit button-box" align="center" pack="center" flex="1"> + <hbox class="box-inherit" align="center" pack="center" flex="1"> + <image class="button-icon"/> + <label class="button-text"/> + </hbox> + <dropmarker class="button-menu-dropmarker"/> + </hbox>`), + true + ); + Object.defineProperty(this, "menuFragment", { value: frag }); + return frag; + } + + get _hasConnected() { + return this.querySelector(":scope > .button-box") != null; + } + + connectedCallback() { + if (this.delayConnectedCallback() || this._hasConnected) { + return; + } + + let fragment; + if (this.type === "menu") { + fragment = MozButton.menuFragment; + + this.addEventListener("keypress", event => { + if (event.keyCode != KeyEvent.DOM_VK_RETURN && event.key != " ") { + return; + } + + this.open = true; + // Prevent page from scrolling on the space key. + if (event.key == " ") { + event.preventDefault(); + } + }); + } else { + fragment = this.constructor.buttonFragment; + } + + this.appendChild(fragment.cloneNode(true)); + this.initializeAttributeInheritance(); + this.inRichListItem = !!this.closest("richlistitem"); + } + } + + customElements.define("button", MozButton); +} |