gistfile1.js

buffer.js
---
        /**
         * Scrolls the buffer vertically <b>pages</b> pages.
         *
         * @param {number} pages The number of pages to scroll.
         */
        scrollPages: function (pages)
        {
            let win = findScrollableWindow();
            checkScrollYBounds(win, pages);
            win.scrollByPages(pages);
        },

        /**
         * Scrolls the buffer vertically <b>count</b> * 'scroll' rows.
         *
         * @param {number} count The multiple of 'scroll' lines to scroll.
         * @param {number} direction The direction to scroll, down if 1 and up if -1.
         */
        scrollByScrollSize: function (count, direction) // XXX: boolean
        {
            if (count > 0)
                options["scroll"] = count;

            let win = findScrollableWindow();
            checkScrollYBounds(win, direction);

            if (options["scroll"] > 0)
                this.scrollLines(options["scroll"] * direction);
            else // scroll half a page down in pixels
                win.scrollBy(0, win.innerHeight / 2 * direction);
        },