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// This file is loaded into the browser window scope.
/* eslint-env mozilla/browser-window */
// -*- tab-width: 2; indent-tabs-mode: nil; js-indent-level: 2 -*-
/* 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
customElements.define(
"printpreview-pagination",
class PrintPreviewPagination extends HTMLElement {
static get markup() {
return `
<html:link rel="stylesheet" href="chrome://global/content/printPagination.css" />
<html:div class="container">
<html:button id="navigateHome" class="toolbarButton startItem" data-l10n-id="printpreview-homearrow-button"></html:button>
<html:button id="navigatePrevious" class="toolbarButton" data-l10n-id="printpreview-previousarrow-button"></html:button>
<html:div class="toolbarCenter"><html:span id="sheetIndicator" data-l10n-id="printpreview-sheet-of-sheets" data-l10n-args='{ "sheetNum": 1, "sheetCount": 1 }'></html:span></html:div>
<html:button id="navigateNext" class="toolbarButton" data-l10n-id="printpreview-nextarrow-button"></html:button>
<html:button id="navigateEnd" class="toolbarButton endItem" data-l10n-id="printpreview-endarrow-button"></html:button>
</html:div>
`;
}
static get defaultProperties() {
return {
currentPage: 1,
sheetCount: 1,
};
}
get previewBrowser() {
return this._previewBrowser;
}
set previewBrowser(aBrowser) {
this._previewBrowser = aBrowser;
}
observePreviewBrowser(browser) {
if (browser == this.previewBrowser || !this.isConnected) {
return;
}
this.previewBrowser = browser;
this.mutationObserver.disconnect();
this.mutationObserver.observe(browser, {
attributes: ["current-page", "sheet-count"],
});
this.updateFromBrowser();
}
connectedCallback() {
MozXULElement.insertFTLIfNeeded("toolkit/printing/printPreview.ftl");
const shadowRoot = this.attachShadow({ mode: "open" });
document.l10n.connectRoot(shadowRoot);
let fragment = MozXULElement.parseXULToFragment(this.constructor.markup);
this.shadowRoot.append(fragment);
this.elements = {
sheetIndicator: shadowRoot.querySelector("#sheetIndicator"),
homeButton: shadowRoot.querySelector("#navigateHome"),
previousButton: shadowRoot.querySelector("#navigatePrevious"),
nextButton: shadowRoot.querySelector("#navigateNext"),
endButton: shadowRoot.querySelector("#navigateEnd"),
};
this.shadowRoot.addEventListener("click", this);
this.mutationObserver = new MutationObserver(() =>
this.updateFromBrowser()
);
// Initial render with some default values
// We'll be updated with real values when available
this.update(this.constructor.defaultProperties);
}
disconnectedCallback() {
document.l10n.disconnectRoot(this.shadowRoot);
this.shadowRoot.textContent = "";
this.mutationObserver?.disconnect();
delete this.mutationObserver;
this.currentPreviewBrowserObserver?.disconnect();
delete this.currentPreviewBrowserObserver;
}
handleEvent(event) {
if (event.type == "click" && event.button != 0) {
return;
}
event.stopPropagation();
switch (event.target) {
case this.elements.homeButton:
this.navigate(0, 0, "home");
break;
case this.elements.previousButton:
this.navigate(-1, 0, 0);
break;
case this.elements.nextButton:
this.navigate(1, 0, 0);
break;
case this.elements.endButton:
this.navigate(0, 0, "end");
break;
}
}
navigate(aDirection, aPageNum, aHomeOrEnd) {
const nsIWebBrowserPrint = Ci.nsIWebBrowserPrint;
let targetNum;
let navType;
// we use only one of aHomeOrEnd, aDirection, or aPageNum
if (aHomeOrEnd) {
// We're going to either the very first page ("home"), or the
// very last page ("end").
if (aHomeOrEnd == "home") {
targetNum = 1;
navType = nsIWebBrowserPrint.PRINTPREVIEW_HOME;
} else {
targetNum = this.sheetCount;
navType = nsIWebBrowserPrint.PRINTPREVIEW_END;
}
} else if (aPageNum) {
// We're going to a specific page (aPageNum)
targetNum = Math.min(Math.max(1, aPageNum), this.sheetCount);
navType = nsIWebBrowserPrint.PRINTPREVIEW_GOTO_PAGENUM;
} else {
// aDirection is either +1 or -1, and allows us to increment
// or decrement our currently viewed page.
targetNum = Math.min(
Math.max(1, this.currentSheet + aDirection),
this.sheetCount
);
navType = nsIWebBrowserPrint.PRINTPREVIEW_GOTO_PAGENUM;
}
// Preemptively update our own state, rather than waiting for the message from the child process
// This allows subsequent clicks of next/back to advance 1 page per click if possible
// and keeps the UI feeling more responsive
this.update({ currentPage: targetNum });
this.previewBrowser.sendMessageToActor(
"Printing:Preview:Navigate",
{
navType,
pageNum: targetNum,
},
"Printing"
);
}
update(data = {}) {
if (data.sheetCount) {
this.sheetCount = data.sheetCount;
}
if (data.currentPage) {
this.currentSheet = data.currentPage;
}
document.l10n.setAttributes(
this.elements.sheetIndicator,
this.elements.sheetIndicator.dataset.l10nId,
{
sheetNum: this.currentSheet,
sheetCount: this.sheetCount,
}
);
}
updateFromBrowser() {
let sheetCount = parseInt(
this.previewBrowser.getAttribute("sheet-count"),
10
);
let currentPage = parseInt(
this.previewBrowser.getAttribute("current-page"),
10
);
this.update({ sheetCount, currentPage });
}
}
);