- Migrated from https://github.com/Yetangitu/owncloud-apps

- substantial bit rot accrued in 4 years of non-maintenance which made Reader unusable - Reader now works reliably on public pages - or at least it _Works For Me™_ - Refactored a substantial part of the code to comply to the "current" (ha ha) Nextcloud API - Dropped Owncloud compatibility for lack of a testing installation - Dropped IE (<11) support - Dropped compatibility with older (<20) Nextcloud versions - Dropped app-specific ajax code, now handled by SettingsController - Updated dependencies where applicable
2022-09-24 00:00:03 +00:00 · 2022-09-24 00:00:03 +00:00 · b190e180ef
commit b190e180ef
parent 16afbe45fe
137 changed files with 30984 additions and 2 deletions
--- a/vendor/pdfjs/controllers/toc_controller.js
+++ b/vendor/pdfjs/controllers/toc_controller.js
@ -0,0 +1,202 @@
+PDFJS.reader.TocController = function() {
+
+    var reader = this,
+	    book = this.book,
+        settings = reader.settings,
+        toc = document.getElementById("toc"),
+        tovView = document.getElementById("tocView"),
+        $toc_populate = $("#toc_populate"),
+        timeout;
+
+    var isVisible = function (element) {
+
+		var viewport = element.getBoundingClientRect(),
+			visible,
+            offset = settings.preloadOffset;
+
+		visible = (
+			viewport.top  >= (0 - offset)
+				&& viewport.left >= (0 - offset)
+				&& viewport.right < (window.innerWidth + offset)
+				&& viewport.bottom < (window.innerHeight + offset)
+		);
+
+        return visible;
+	};
+
+	var lazyLoad = function () {
+
+		var elements = toc.querySelectorAll('img[data-pagenum]'),
+			pagenum,
+            count;
+
+		for (var i = 0; i < elements.length; i++) {
+			if (isVisible(elements[i])) {
+				pagenum = elements[i].getAttribute("data-pagenum");
+				elements[i].removeAttribute("data-pagenum");
+				reader.getThumb(parseInt(pagenum), true);
+                count++;
+			}
+		}
+
+        if (!elements.length || count === elements.length ) {
+            removeLazyLoader(tocView);
+        }
+	};
+
+    var lazyLoader = function () {
+        timeout = setTimeout( function () {
+            lazyLoad();
+        }, settings.lazyDelay);
+    };
+
+    var addLazyLoader = function (_element) {
+
+        var element = _element || window;
+
+        element.addEventListener("scroll", lazyLoader, false);
+        element.addEventListener("load", lazyLoader, false);
+    };
+
+    var removeLazyLoader = function (_element) {
+
+        var element = _element || window;
+
+        element.removeEventListener("scroll", lazyLoader);
+        element.removeEventListener("load", lazyLoader);
+    };
+
+    var tocCreate = function (no_pages, width, height, populate) {
+        
+        var canvas = document.createElement("canvas"),
+            ctx = canvas.getContext("2d"),
+            aspect,
+            imgsrc,
+            preloadcount,
+            scale,
+            timeout;
+
+        aspect = parseFloat(width / height);
+
+        // create small placeholder image
+        canvas.width = 10;
+        canvas.height = parseInt(canvas.width / aspect);
+
+        placeholder_width = reader.settings.thumbnailWidth;
+        placeholder_height = parseInt(reader.settings.thumbnailWidth / aspect);
+
+        // fill with transparent black, style in CSS
+        ctx.fillStyle = "rgba(0, 0, 0, 0)";
+        ctx.fillRect(0, 0, canvas.width, canvas.height);
+        imgsrc = canvas.toDataURL();
+
+        for(var i = 0; i < no_pages; i++) {
+            var item = document.createElement('li'),
+                placeholder = new Image(),
+                label = document.createElement('span'),
+                page_label = reader.pageLabels[i + 1];
+
+            item.setAttribute("id", "page_" + parseInt(i + 1));
+            placeholder.src = imgsrc;
+            placeholder.style.width = reader.settings.thumbnailWidth;
+            placeholder.style.height = parseInt(reader.settings.thumbnailWidth / aspect);
+            placeholder.classList.add("placeholder");
+            label.innerHTML = page_label || (i + 1).toString();
+            label.classList.add("page_label");
+            //label.style.left = width;
+            item.appendChild(placeholder);
+            item.appendChild(label);
+            toc.appendChild(item);
+            if (populate) {
+                reader.getThumb(i + 1, true);
+            } else {
+                placeholder.setAttribute("data-pagenum", parseInt(i + 1));
+            }
+        }
+
+        if (!populate) {
+
+            // preload first screenfull of thumbnails
+            scale = parseFloat(settings.thumbnailWidth / width);
+            preloadcount = parseInt(window.innerHeight / placeholder_height) + 2;
+            if (preloadcount > settings.numPages)
+                preloadcount = settings.numPages;
+
+            var _timeout = setTimeout(function () {
+                for (var i = 1; i <= preloadcount; i++) {
+                    reader.getThumb(i, true);
+                }
+            }, settings.initialLazyDelay);
+        }
+    };
+
+    var tocInsert = function (image, page, replace) {
+        var placeholder = toc.children[page - 1].firstChild;
+        if (replace === true) {
+            placeholder.parentNode.replaceChild(image, placeholder);
+        }
+
+        toc.children[page - 1].addEventListener('click', function (e) {
+            reader.queuePage(page);
+        });
+    };
+
+    var tocPopulate = function () {
+        var i = 0;
+        while (i < reader.settings.numPages) {
+            reader.getThumb(i, true);
+            i++;
+        }
+
+        reader.thumbnails = true;
+        $toc_populate.addClass("hide");
+		remove_lazy_loader();
+    };
+
+    if (!settings.thumbnails) {
+        addLazyLoader(tocView);
+    }
+
+    reader.book.getPage(1).then(function(page) {
+        var width,
+            height,
+            viewport,
+            page_rotation,
+            rotation;
+
+        page_rotation = page.rotate;
+        rotation = (page_rotation + reader.settings.rotation) % 360;
+
+        viewport = page.getViewport(1, rotation);
+
+        width = viewport.width;
+        height = viewport.height;
+
+        tocCreate(settings.numPages, width, height, settings.thumbnails);
+    });
+
+	var onShow = function() {
+        tocView.classList.add('open');
+        scrollToPage(settings.currentPage);
+	};
+
+	var onHide = function() {
+        tocView.classList.remove('open');
+	};
+
+    var scrollToPage = function (pageNum) {
+        if (pageNum > 0 && pageNum <= settings.numPages) {
+            thumb = document.getElementById("page_" + pageNum);
+            if (thumb)
+                thumb.scrollIntoView();
+        }
+    };
+
+	return {
+		"show" : onShow,
+		"hide" : onHide,
+        "tocInsert": tocInsert,
+        "totPopulate": tocPopulate,
+        "scrollToPage": scrollToPage
+	};
+};