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71 lines
2.8 KiB
71 lines
2.8 KiB
// Increase/decrease code font size
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define([
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'base/js/namespace',
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'base/js/events'
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], function(Jupyter, events) {
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var code_change_fontsize = function(doIncrease) {
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var pre_css = null;
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var pre_style = null;
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for(i = 0; i < document.styleSheets.length; i++){
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//if style sheet is custom.css
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if(/localhost.*\/custom\/custom\.css/.test(document.styleSheets[i].href)){
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//pre_css now contains the style sheet custom.css
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pre_css = document.styleSheets[i];
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break;
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}
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}
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for(i = 0; i < pre_css.cssRules.length; i++){
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if(/\.CodeMirror pre/.test(pre_css.cssRules[i].selectorText)){
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pre_style = pre_css.cssRules[i].style;
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break;
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}
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}
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if(pre_style == null){
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pre_css.insertRule(".CodeMirror pre { font-size: \"14px\"; padding-bottom: \"0px\"; }", 0);
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pre_style = pre_css.cssRules[0];
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}
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var font_size = pre_style.fontSize || "";
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if(font_size == "")
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font_size = 14;
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else
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font_size = +/\d+/.exec(font_size)[0];
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font_size += (doIncrease ? +3 : -3);
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font_size = (font_size < 8 ? 8 : font_size);
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var padding_size = (font_size <= 14 ? 0 : (font_size - 14));
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pre_style.paddingBottom = padding_size + "px";
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pre_style.fontSize = font_size + "px";
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};
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var load_ipython_extension = function () {
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Jupyter.toolbar.add_buttons_group([
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/*
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* Buttons to increase/decrease code font size
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*/
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Jupyter.keyboard_manager.actions.register ({
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'help' : 'Increase code font size',
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'icon' : 'fa-search-plus',
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'handler': function () {
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$( document ).ready(code_change_fontsize(true));
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}
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}, 'increase-code-font-size', 'code_font_size'),
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Jupyter.keyboard_manager.actions.register ({
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'help' : 'Decrease code font size',
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'icon' : 'fa-search-minus',
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'handler': function () {
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$( document ).ready(code_change_fontsize(false));
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}
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}, 'decrease-code-font-size', 'code_font_size'),
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]);
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};
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return {
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load_ipython_extension : load_ipython_extension
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};
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});
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