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//==============================================================================
// Elements which contains the location of the previous and next site
//==============================================================================
const prev = document.getElementById("prev-site");
const next = document.getElementById("next-site");
//==============================================================================
// Handle arrow keys and change the location to the desired direction
//==============================================================================
document.addEventListener("keyup", function(e) {
if(!e.ctrlKey && !e.shiftKey) {
(e.keyCode === 37 && prev) && (window.location.href = prev.getAttribute("href"));
(e.keyCode === 39 && next) && (window.location.href = next.getAttribute("href"));
}
}, false);
//==============================================================================
// Markdown tags to replace
//==============================================================================
const markdownTags = {
"bold": ["**", "**"],
"italic": ["*", "*"],
"heading": ["## ", "\n"],
"link": ["[", "](href)"],
"image": [""],
"code": ["\n~~~\n", "\n~~~\n"],
"quote": ["\n> ", ""],
"list_ul": ["* ", ""],
"list_ol": ["1. ", ""]
};
//==============================================================================
// Timeout function for delayed execution of code
//==============================================================================
function delayed(callback) {
window.setTimeout(callback, 20);
}
//==============================================================================
// Set caret position in editor
//==============================================================================
function setCaretPosition(position) {
document.getElementById("content-editor").setSelectionRange(position, position);
document.getElementById("content-editor").focus();
}
//==============================================================================
// Insert emoticon after cursor in editor
//==============================================================================
function insertEmoticon(target, emoticon) {
const selectionStart = target.selectionStart;
const selectionEnd = target.selectionEnd;
const content = target.value;
target.value = content.slice(0, selectionStart) + emoticon + content.slice(selectionEnd);
delayed(function() {
setCaretPosition(selectionStart + emoticon.length);
});
}
//==============================================================================
// Insert markdown around text in editor
//==============================================================================
function insertMarkdown(target, markdown) {
const selectionStart = target.selectionStart;
const selectionEnd = target.selectionEnd;
const selectedText = target.value.substring(selectionStart, selectionEnd);
const content = target.value;
target.value = content.slice(0, selectionStart) + markdownTags[markdown][0] + selectedText + markdownTags[markdown][1] + content.slice(selectionEnd);
delayed(function() {
setCaretPosition(selectionStart + markdownTags[markdown][0].length + selectedText.length + markdownTags[markdown][1].length);
});
}
//==============================================================================
// Keep server-side session active if the user is writing a long text
//==============================================================================
setInterval(function() {
const Request = new XMLHttpRequest();
Request.open("HEAD", "", true);
Request.send();
}, 300000);
//==============================================================================
// Confirmation message for delete button
//==============================================================================
if(document.getElementById("delete-button")) {
document.getElementById("delete-button").onclick = function(e) {
return confirm(e.target.getAttribute("data-text"));
};
}
//==============================================================================
// Insert or remove tab indent in editor if [<shift>+]<tab> is pressed
//==============================================================================
(function() {
if(document.getElementById("content-editor")) {
const element = document.getElementById("content-editor");
element.addEventListener("keydown", function(e) {
if(e.keyCode === 9 && !e.ctrlKey) {
const selectionStart = element.selectionStart;
const selectionEnd = element.selectionEnd;
const content = element.value;
if(e.shiftKey) {
if(content.substring(selectionStart, selectionStart -1) === "\t") {
element.value = content.substring(0, selectionStart - 1) + content.substring(selectionEnd);
setCaretPosition(selectionStart - 1);
}
}
else {
element.value = content.substring(0, selectionStart) + "\t" + content.substring(selectionEnd);
setCaretPosition(selectionStart + 1);
}
e.preventDefault();
}
}, false);
}
})();
//==============================================================================
// Emoticon button list
//==============================================================================
(function() {
if(document.getElementById("emoticon-list")) {
const list = document.getElementById("emoticon-list");
const node = document.getElementById("content-editor");
const items = list.getElementsByTagName("li");
for(let i = 0; i < items.length; ++i) {
items[i].onmousedown = function(e) {
insertEmoticon(node, e.target.getAttribute("data-emoticon"));
};
}
}
})();
//==============================================================================
// Markdown button list
//==============================================================================
(function() {
if(document.getElementById("markdown-list")) {
const list = document.getElementById("markdown-list");
const node = document.getElementById("content-editor");
const items = list.getElementsByTagName("li");
for(let i = 0; i < items.length; ++i) {
items[i].onmousedown = function(e) {
insertMarkdown(node, e.target.getAttribute("data-markdown"));
};
}
}
})();
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