OpenSlides/openslides/mediafiles/static/js/pdf_presenter.js

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JavaScript
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/*
* JavaScript functions for pdf presenter of OpenSlides.
*
*/
var pdf = PDFJS.getDocument(projector['pdf_url']);
projector['load_pdf_page'] = function(page) {
projector['pdf_page_num'] = page;
pdf.then(function(pdf) {
pdf.getPage(page).then(set_convas_size);
});
};
projector['load_pdf'] = function(data) {
projector['pdf_url'] = data['url'];
projector['pdf_page_num'] = data['page_num'];
pdf = PDFJS.getDocument(projector['pdf_url']);
projector['load_pdf_page'](projector['pdf_page_num']);
};
projector['toggle_fullscreen'] = function(fullscreen) {
projector['pdf_fullscreen'] = fullscreen;
content = $('#content');
presentation = $('#presentation');
footer = $('#footer');
body = $('body');
if (fullscreen) {
content.addClass('fullscreen');
presentation.addClass('fullscreen');
footer.addClass('black');
body.addClass('black');
} else {
content.removeClass('fullscreen');
presentation.removeClass('fullscreen');
footer.removeClass('black');
body.removeClass('black');
}
$(window).resize();
};
function scale_to_height(page) {
return page.getViewport(window.innerHeight / page.getViewport(1.0).height);
}
function scale_to_width(page) {
return page.getViewport(window.innerWidth / page.getViewport(1.0).width);
}
function get_correct_viewport(page, canvas) {
if(window.innerWidth > window.innerHeight) {
viewport = scale_to_height(page);
if (viewport.width > window.innerWidth) {
viewport = scale_to_width(page);
canvas.height = viewport.height;
canvas.width = window.innerWidth;
} else {
canvas.height = window.innerHeight;
canvas.width = viewport.width;
}
} else {
viewport = scale_to_width(page);
if (viewport.height > window.innerHeight) {
viewport = scale_to_height(page);
canvas.height = window.innerHeight;
canvas.width = viewport.width;
} else {
canvas.height = viewport.height;
canvas.width = window.innerWidth;
}
}
return viewport;
}
function set_convas_size(page) {
var canvas = document.getElementById('presentation');
var context = canvas.getContext('2d');
if (projector['pdf_fullscreen']) {
viewport = get_correct_viewport(page, canvas);
} else {
viewport = page.getViewport(window.innerWidth / page.getViewport(1.0).width);
canvas.height = viewport.height;
canvas.width = window.innerWidth;
}
page.render({canvasContext: context, viewport: viewport});
}
$(document).ready(function () {
$(window).resize(function() {
projector['load_pdf_page'](projector['pdf_page_num']);
});
if (projector['pdf_fullscreen']) {
if (!$('#content').hasClass('fullscreen')) {
$('#content').addClass('fullscreen');
$('#footer').addClass('black');
$('body').addClass('black');
}
}
$(window).resize();
});