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luminotes
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luminotes/static/js/Editor.js

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JavaScript
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GECKO = /Gecko/.test( navigator.userAgent ) && !/like Gecko/.test( navigator.userAgent );
WEBKIT = /WebKit/.test( navigator.userAgent );
MSIE6 = /MSIE 6\.0/.test( navigator.userAgent );
MSIE = /MSIE/.test( navigator.userAgent );
OPERA = /Opera/.test( navigator.userAgent );
FRAME_BORDER_WIDTH = 2;
FRAME_BORDER_HEIGHT = 2;
function Shared_iframe() {
this.iframe = createDOM( "iframe",
{
// iframe src attribute is necessary in IE 6 on an HTTPS site to prevent annoying warnings
"src": MSIE6 && "/static/html/blank.html" || "about:blank",
"frameBorder": "0",
"scrolling": "no",
"class": "note_frame invisible",
"height": "0"
}
);
insertSiblingNodesAfter( "iframe_area", this.iframe );
// enable design mode
if ( this.iframe.contentDocument ) { // browsers such as Firefox
this.iframe.contentDocument.designMode = "On";
} else { // browsers such as IE
this.iframe.contentWindow.document.designMode = "On";
}
if ( this.iframe.contentDocument ) { // browsers such as Firefox
var document = this.iframe.contentDocument;
} else { // browsers such as IE
var document = this.iframe.contentWindow.document;
}
document.open();
var padding = '1.5em';
if ( GECKO )
padding = '1.5em 1.5em 1em 1.5em';
else if ( MSIE )
padding = '1.5em 1.5em 2.25em 1.5em';
else if ( WEBKIT )
padding = '0.4em 1.5em 1em 1.5em';
document.write(
'<html><head><style>html { padding: 0em; margin: 0; } body { padding: ' + padding + '; margin: 0; font-size: 90%; line-height: 140%; font-family: sans-serif; white-space: pre-line; word-wrap: break-word; } h3 { padding-bottom: 0.25em; border-bottom: 1px solid #dddddd; margin-bottom: 0.75em; } a[target ^= "_new"] { background: url(/static/images/web_icon_tiny.png) right center no-repeat; padding-right: 13px; } .diff a[target ^= "_new"] { background-image: none; padding-right: 0; } a:hover { color: #ff6600; } img { border-width: 0; } .left_justified { float: left; margin: 0.5em 1.5em 0.5em 0; } .center_justified { display: block; margin: 0.5em auto 0.5em auto; text-align: center; } .right_justified { float: right; margin: 0.5em 0 0.5em 1.5em; } hr { border: 0; color: #000000; background-color: #000000; height: 1px; } ul { list-style-type: disc; } ul li { margin-top: 0.5em; } ol li { margin-top: 0.5em; } .center_text { text-align: center; } .small_text { padding-top: 0.5em; font-size: 90%; } .indented { margin-left: 1em; } .thumbnail_left { float: left; margin: 0.5em; margin-right: 1em; margin-bottom: 0.5em; border: 1px solid #999999; } .thumbnail_right { float: right; margin: 0.5em; margin-left: 1em; margin-bottom: 0.5em; border: 1px solid #999999; }</style>' +
'<meta content="text/html; charset=UTF-8" http-equiv="content-type"></meta></head><body></body></html>'
);
document.close();
}
Shared_iframe.prototype.editor = function () {
return this.iframe.editor;
}
function Editor( id, notebook_id, note_text, deleted_from_id, revision, read_write, startup, highlight, focus, position_after, start_dirty, own_notes_only ) {
this.id = id;
this.notebook_id = notebook_id;
this.initial_text = note_text;
this.start_dirty = start_dirty;
this.deleted_from_id = deleted_from_id || null;
this.revision = revision;
this.user_revisions = new Array(); // cache for this note's list of revisions, loaded from the server on-demand
this.read_write = read_write; // whether the user has read-write access to this Editor
this.own_notes_only = own_notes_only; // whether the user only has read-write access to their own notes
this.edit_enabled = read_write && !deleted_from_id; // whether editing is actually enabled for this Editor
this.startup = startup || false; // whether this Editor is for a startup note
this.init_highlight = highlight || false;
this.init_focus = focus || false;
this.closed = false;
this.link_started = null;
this.hover_target = null;
this.hover_timer = null;
this.document = null;
this.iframe = null;
this.div = null;
this.title = "";
// all editors share a common design mode iframe, each claiming use of it as necessary
if ( !Editor.shared_iframe )
Editor.shared_iframe = new Shared_iframe();
this.create_div( position_after );
// if the Editor is to be focused, create an editable iframe. otherwise just create a static div
if ( ( highlight || focus ) && this.edit_enabled )
this.claim_iframe( position_after );
}
Editor.prototype.create_div = function ( position_after ) {
var self = this;
// if there is already a static note div for this Editor, connect up the note controls and bail
var static_note_div = getElement( "static_note_" + this.id );
if ( static_note_div ) {
this.note_controls = getElement( "note_controls_" + this.id );
this.holder = getElement( "note_holder_" + this.id );
this.grabber = getElement( "note_grabber_" + this.id );
this.connect_note_controls( true );
this.div = static_note_div;
this.div.editor = this;
static_contents = getFirstElementByTagAndClassName( "span", "static_note_contents", this.div );
if ( static_contents && static_contents.innerHTML != this.initial_text )
static_contents.innerHTML = this.initial_text;
this.scrape_title();
this.focus_default_text_field();
this.connect_handlers();
return;
}
var static_contents = createDOM( "span", { "class": "static_note_contents" } );
static_contents.innerHTML = this.contents();
this.div = createDOM(
"div", { "class": "static_note_div", "id": "static_note_" + this.id }, static_contents
);
this.div.editor = this;
this.create_note_controls();
this.connect_note_controls();
this.holder = createDOM( "table", { "id": "note_holder_" + this.id, "class": "note_holder" },
createDOM( "tbody", {},
createDOM( "tr", {},
createDOM( "td", {}, this.note_controls )
),
createDOM( "tr", {},
createDOM( "td", { "width": "100%" }, this.div ),
this.grabber
),
createDOM( "tr", { "id": "note_shadow_" + this.id, "class": "note_shadow undisplayed" },
createDOM( "div", { "class": "note_shadow_corner" } )
)
)
);
if ( position_after && position_after.parentNode )
insertSiblingNodesAfter( position_after, this.holder );
else
appendChildNodes( "notes", this.holder );
this.scrape_title();
this.focus_default_text_field();
this.connect_handlers();
signal( self, "init_complete" );
}
Editor.prototype.create_note_controls = function () {
var iframe_id = "note_" + this.id;
this.grabber = createDOM( "td", { "id": "note_grabber_" + this.id, "class": "note_grabber" }, "....." );
if ( !this.read_write || this.own_notes_only )
addElementClass( this.grabber, "invisible" );
if ( this.read_write ) {
this.delete_button = createDOM( "input", {
"type": "button",
"class": "note_button",
"id": "delete_" + iframe_id,
"value": "delete" + ( this.deleted_from_id ? " forever" : "" ),
"title": "delete note [ctrl-d]"
} );
if ( this.deleted_from_id ) {
this.undelete_button = createDOM( "input", {
"type": "button",
"class": "note_button",
"id": "undelete_" + iframe_id,
"value": "undelete",
"title": "undelete note"
} );
} else if ( !this.own_notes_only ) {
this.changes_button = createDOM( "input", {
"type": "button",
"class": "note_button",
"id": "changes_" + iframe_id,
"value": "changes",
"title": "previous revisions"
} );
this.tools_button = createDOM( "input", {
"type": "button",
"class": "note_button",
"id": "tools_" + iframe_id,
"value": "tools",
"title": "note tools"
} );
}
}
if ( !this.deleted_from_id && ( this.read_write || !this.startup ) && !this.own_notes_only ) {
this.hide_button = createDOM( "input", {
"type": "button",
"class": "note_button",
"id": "hide_" + iframe_id,
"value": "hide",
"title": "hide note [ctrl-h]"
} );
}
this.note_controls = createDOM(
"div", { "class": "note_controls", "id": "note_controls_" + this.id },
this.delete_button ? this.delete_button : null,
this.delete_button ? " " : null,
this.changes_button ? this.changes_button : null,
this.changes_button ? " " : null,
this.tools_button ? this.tools_button : null,
this.tools_button ? " " : null,
this.undelete_button ? this.undelete_button : null,
this.undelete_button ? " " : null,
this.hide_button ? this.hide_button : null
);
}
Editor.prototype.connect_note_controls = function ( store_control_buttons ) {
if ( store_control_buttons ) {
var iframe_id = "note_" + this.id;
this.delete_button = getElement( "delete_" + iframe_id );
this.undelete_button = getElement( "undelete_" + iframe_id );
this.changes_button = getElement( "changes_" + iframe_id );
this.tools_button = getElement( "tools_" + iframe_id );
this.hide_button = getElement( "hide_" + iframe_id );
}
var self = this;
if ( this.delete_button ) {
disconnectAll( this.delete_button );
connect( this.delete_button, "onclick", function ( event ) { signal( self, "delete_clicked", event ); } );
}
if ( this.undelete_button ) {
disconnectAll( this.undelete_button );
connect( this.undelete_button, "onclick", function ( event ) { signal( self, "undelete_clicked", event ); } );
}
if ( this.changes_button ) {
disconnectAll( this.changes_button );
connect( this.changes_button, "onclick", function ( event ) { signal( self, "changes_clicked", event ); } );
}
if ( this.tools_button ) {
disconnectAll( this.tools_button );
connect( this.tools_button, "onclick", function ( event ) { signal( self, "tools_clicked", event ); } );
}
if ( this.hide_button ) {
disconnectAll( this.hide_button );
connect( this.hide_button, "onclick", function ( event ) { signal( self, "hide_clicked", event ); } );
}
if ( this.grabber ) {
disconnectAll( this.grabber );
connect( this.grabber, "onmousedown", function ( event ) { self.start_drag( event ); } );
connect( this.grabber, "onclick", function ( event ) { event.stop(); } );
}
}
Editor.prototype.claim_iframe = function ( position_after ) {
var self = this;
var iframe_id = "note_" + this.id;
// if there is already an iframe for this Editor, bail
if ( this.iframe )
return;
// claim the reusable iframe for this note, stealing it from the note that's using it (if any)
this.iframe = Editor.shared_iframe.iframe;
this.iframe.setAttribute( "id", iframe_id );
this.iframe.setAttribute( "name", iframe_id );
if ( this.iframe.editor )
this.iframe.editor.release_iframe();
this.iframe.editor = this;
// setup the note controls
this.note_controls = getElement( "note_controls_" + this.id );
this.connect_note_controls( true );
// give the iframe the note's current contents and then resize it based on the size of the div
var range = this.add_selection_bookmark();
this.set_iframe_contents( this.contents() );
this.remove_selection_bookmark( range );
this.resize( true );
// make the completed iframe visible and hide the static div
addElementClass( this.iframe, "focused_note_frame" );
removeElementClass( this.iframe, "invisible" );
addElementClass( this.div, "invisible" );
addElementClass( this.grabber, "note_grabber_focused" );
function finish_init() {
self.position_cursor( range );
self.connect_handlers();
signal( self, "focused", self );
self.focus( true );
}
// this small delay gives Firefox enough lag time after set_iframe_contents() to display the
// blinking text cursor at the end of the iframe contents
if ( GECKO && !range )
setTimeout( finish_init, 1 );
else
finish_init();
}
Editor.prototype.set_iframe_contents = function ( contents_text ) {
if ( this.iframe.contentDocument ) { // browsers such as Firefox
this.document = this.iframe.contentDocument;
} else { // browsers such as IE
this.document = this.iframe.contentWindow.document;
}
// hack: add a zero-width space to make the horizontal line under title show up in the
// correct position, even before there is a title
if ( !contents_text )
contents_text = "<h3>&#8203;";
this.document.body.innerHTML = contents_text;
}
Editor.prototype.focus_default_text_field = function () {
// special-case: focus any username field found within this div
var username = getElement( "username" );
if ( username && isChildNode( username, this.div ) )
username.focus();
}
Editor.prototype.add_selection_bookmark = function () {
if ( window.getSelection ) { // browsers such as Firefox
// grab the current range for this editor's div so that it can be duplicated within the iframe
var selection = window.getSelection();
if ( selection.rangeCount > 0 )
var range = selection.getRangeAt( 0 );
else
var range = document.createRange();
// if the current range is not within this editor's static note div, then bail
if ( range.startContainer == document || range.endContainer == document )
return null;
try {
if ( !isChildNode( range.startContainer.parentNode, this.div ) || !isChildNode( range.endContainer.parentNode, this.div ) )
return null;
} catch ( e ) {
return null;
}
// mark the nodes that are start and end containers for the current range. we have to mark the
// parent node instead of the start/end container itself, because text nodes can't have classes
var parent_node = range.startContainer.parentNode
if ( !hasElementClass( parent_node, "static_note_div" ) ) {
addElementClass( parent_node, "range_start_container" );
for ( var i in parent_node.childNodes ) {
var child_node = parent_node.childNodes[ i ];
if ( child_node == range.startContainer ) {
range.start_child_offset = i;
break;
}
}
}
var parent_node = range.endContainer.parentNode
if ( !hasElementClass( parent_node, "static_note_div" ) ) {
addElementClass( parent_node, "range_end_container" );
for ( var i in parent_node.childNodes ) {
var child_node = parent_node.childNodes[ i ];
if ( child_node == range.endContainer ) {
range.end_child_offset = i;
break;
}
}
}
return range;
} else if ( document.selection ) { // browsers such as IE
var range = document.selection.createRange();
if ( !isChildNode( range.parentElement(), this.div ) )
return null;
return range;
}
return null;
}
Editor.prototype.remove_selection_bookmark = function ( range ) {
// unmark the nodes that are start and end containers for the given range
if ( range && range.startContainer && range.endContainer ) {
removeElementClass( range.startContainer.parentNode, "range_start_container" );
removeElementClass( range.endContainer.parentNode, "range_end_container" );
}
}
Editor.prototype.position_cursor = function ( div_range ) {
if ( this.init_focus ) {
this.init_focus = false;
if ( this.iframe )
this.focus( true );
}
// if requested, move the text cursor to a specific location
if ( div_range && this.iframe.contentWindow && this.iframe.contentWindow.getSelection ) { // browsers such as Firefox
// position the cursor by using a bookmarked text range
var selection = this.iframe.contentWindow.getSelection();
selection.removeAllRanges();
var range = this.document.createRange();
var start = getFirstElementByTagAndClassName( null, "range_start_container", this.document );
var end = getFirstElementByTagAndClassName( null, "range_end_container", this.document );
// if start and end don't exist, assume that they are the top-level document body node. this
// occurs when start and end are set to the div's static_note_contents node, which doesn't exist
// within the iframe
if ( !start && !end ) {
start = this.document.body;
end = this.document.body;
}
if ( start && end ) {
removeElementClass( start, "range_start_container" );
removeElementClass( end, "range_end_container" );
if ( div_range.start_child_offset )
start = start.childNodes[ div_range.start_child_offset ];
if ( div_range.end_child_offset )
end = end.childNodes[ div_range.end_child_offset ];
range.setStart( start, div_range.startOffset );
range.setEnd( end, div_range.endOffset );
selection.addRange( range );
return;
}
} else if ( div_range && this.document && this.document.selection ) { // browsers such as IE
function text_length( text ) {
var count = 0;
for ( var i = 0; i < text.length; i++ ) {
if ( text.charAt( i ) != "\r" )
count++;
}
return count;
}
// create a range that extends from the start of the div to the start of the original range
var before_div_range = div_range.duplicate();
before_div_range.moveToElementText( this.div );
before_div_range.setEndPoint( "EndToStart", div_range );
// calculate the start offset based on the size of that range in characters
var start = text_length( before_div_range.text ) - 1;
var end = start + text_length( div_range.text );
// finally, position the text cursor within the iframe
var range = this.document.selection.createRange();
range.moveEnd( "character", end );
range.moveStart( "character", start );
range.select();
return;
}
// otherwise, just move the text cursor to the end of the text
if ( this.iframe && this.iframe.contentWindow && this.iframe.contentWindow.getSelection ) { // browsers such as Firefox
var selection = this.iframe.contentWindow.getSelection();
var last_node = this.document.body.lastChild;
selection.removeAllRanges();
var range = this.document.createRange();
while ( ( last_node.nodeValue == "\n" || ( last_node.tagName && last_node.tagName == "BR" ) ) &&
last_node.previousSibling )
last_node = last_node.previousSibling;
range.selectNodeContents( last_node );
range.collapse( false );
selection.addRange( range );
} else if ( this.document && this.document.selection ) { // browsers such as IE
var range = this.document.selection.createRange();
range.move( "textedit" );
range.select();
}
}
Editor.prototype.position_cursor_after = function ( node ) {
if ( this.iframe && this.iframe.contentWindow && this.iframe.contentWindow.getSelection ) { // browsers such as Firefox
var selection = this.iframe.contentWindow.getSelection();
selection.selectAllChildren( node );
selection.collapseToEnd();
}
}
Editor.prototype.collapse_cursor = function () {
if ( this.iframe.contentWindow && this.iframe.contentWindow.getSelection ) { // browsers such as Firefox
var selection = this.iframe.contentWindow.getSelection();
if ( !selection.isCollapsed )
selection.collapseToEnd();
} else if ( this.document.selection ) { // browsers such as IE
var range = this.document.selection.createRange();
range.collapse( false );
range.select();
}
}
Editor.prototype.connect_handlers = function () {
if ( this.document && this.document.body ) {
// since the browser may subtly tweak the html when it's inserted, save off the browser's version
// of the html here. this yields more accurate comparisons within the dirty() method
if ( this.start_dirty )
this.initial_text = "";
else
this.initial_text = this.document.body.innerHTML;
}
var self = this; // necessary so that the member functions of this editor object are used
if ( !this.iframe ) {
connect( this.div, "onmouseup", function ( event ) { self.mouse_released( event ); } );
connect( this.div, "onclick", function ( event ) { self.mouse_clicked( event ) } );
connect( this.div, "onmouseover", function ( event ) { self.mouse_hovered( event ); } );
connect( this.div, "ondragover", function ( event ) { self.mouse_dragged( event ); } );
} else {
if ( this.edit_enabled ) {
connect( this.document, "onkeydown", function ( event ) { self.key_pressed( event ); } );
connect( this.document, "onkeyup", function ( event ) { self.key_released( event ); } );
}
connect( this.document, "onmouseup", function ( event ) { self.mouse_released( event ); } );
connect( this.document, "onclick", function ( event ) { self.mouse_clicked( event ); } );
connect( this.document, "onmouseover", function ( event ) { self.mouse_hovered( event ); } );
connect( this.document, "ondragover", function ( event ) { self.mouse_dragged( event ); } );
connect( this.iframe, "onload", function () { self.resize(); } );
connect( this.iframe, "onresize", function () { setTimeout( function () { self.resize() }, 50 ); } );
connect( this.iframe.contentWindow, "onpaste", function ( event ) { setTimeout( function () { self.resize() }, 50 ); } );
connect( this.iframe.contentWindow, "oncut", function ( event ) { setTimeout( function () { self.resize() }, 50 ); } );
}
// handle each form submit event by forwarding it on as a custom event
function connect_form( form ) {
disconnectAll( form );
connect( form, "onsubmit", function ( event ) {
signal( self, "submit_form", form );
event.stop();
} );
}
var forms = getElementsByTagAndClassName( "form", null, this.div );
for ( var i in forms ) {
var form = forms[ i ];
connect_form( form );
}
// connect each (non-submit) button to issue an event
function connect_button( button ) {
disconnectAll( button );
connect( button, "onclick", function ( event ) {
signal( self, "button_clicked", this, button );
event.stop();
} );
}
var buttons = getElementsByTagAndClassName( "input", "button", this.div );
for ( var i in buttons ) {
var button = buttons[ i ];
if ( button.getAttribute( "type" ) == "submit" )
continue;
connect_button( button );
}
// browsers such as Firefox, but not Opera
if ( GECKO && this.iframe && this.iframe.contentDocument && this.edit_enabled ) {
this.exec_command( "styleWithCSS", false );
this.exec_command( "insertbronreturn", true );
}
if ( this.init_highlight ) {
this.highlight();
this.init_highlight = false;
}
this.scrape_title();
signal( self, "init_complete" );
}
Editor.prototype.highlight = function ( scroll ) {
if ( scroll == undefined )
scroll = true;
var self = this;
function do_highlight() {
if ( !self.iframe ) {
new Highlight( self.div, options = { "queue": { "scope": "highlight", "limit": 1 } } );
return;
}
if ( OPERA ) { // MochiKit's Highlight for iframes is broken in Opera
pulsate( self.iframe, options = { "pulses": 1, "duration": 0.5 } );
} else if ( self.iframe.contentDocument ) { // browsers such as Firefox
new Highlight( self.iframe, options = { "queue": { "scope": "highlight", "limit": 1 } } );
} else { // browsers such as IE
if ( self.document && self.document.body )
new Highlight( self.document.body, options = { "queue": { "scope": "highlight", "limit": 1 } } );
}
}
// focusing the highlighted editor before scrolling to it prevents IE from deciding to
// automatically scroll back to the link immediately afterwards
this.focus();
if ( scroll ) {
var editor_node = this.iframe || this.div;
// if the editor is already completely on-screen, then there's no need to scroll
var viewport_position = getViewportPosition();
if ( getElementPosition( this.note_controls ).y < viewport_position.y ||
getElementPosition( editor_node ).y + getElementDimensions( editor_node ).h > viewport_position.y + getViewportDimensions().h ) {
new ScrollTo( this.note_controls, { "afterFinish": do_highlight, "duration": 0.25 } );
return;
}
}
do_highlight();
}
Editor.prototype.exec_command = function ( command, parameter ) {
command = command.toLowerCase();
if ( command == "h3" ) {
if ( this.state_enabled( "h3" ) )
this.document.execCommand( "formatblock", false, "<p>" );
else
this.document.execCommand( "formatblock", false, "<h3>" );
return;
}
this.document.execCommand( command, false, parameter );
}
Editor.prototype.insert_html = function ( html ) {
if ( html.length == 0 ) return;
if ( !this.edit_enabled || strip( this.contents() ) == "" ) {
this.document.body.innerHTML = html;
return;
}
try { // browsers supporting insertHTML command, such as Firefox
this.document.execCommand( "insertHTML", false, html );
} catch ( e ) { // browsers that don't support insertHTML, such as IE
this.document.body.innerHTML = html;
}
}
Editor.prototype.query_command_value = function ( command ) {
return this.document.queryCommandValue( command );
}
// resize the editor's frame to fit the dimensions of its content
Editor.prototype.resize = function ( get_height_from_div ) {
if ( !this.document ) return;
this.reposition();
var height = null;
var width = elementDimensions( this.div ).w;
// set the width first, because that influences the height of the content
width -= FRAME_BORDER_HEIGHT * 2;
var size = { "w": width };
setElementDimensions( this.iframe, size );
if ( get_height_from_div && !this.empty() ) {
height = elementDimensions( this.div ).h;
height -= FRAME_BORDER_HEIGHT * 2; // 2 pixels at the top and 2 at the bottom
// if no height is given, get the height from this editor's document body
} else {
if ( this.iframe && this.iframe.contentDocument && GECKO ) { // Gecko and other sane browsers
height = elementDimensions( this.document.documentElement ).h;
} else { // IE
height = this.document.body.scrollHeight;
}
}
size = { "h": height };
setElementDimensions( this.iframe, size );
setElementDimensions( this.div, size );
var self = this;
}
Editor.prototype.reposition = function ( repeat ) {
if ( !this.iframe ) return;
// give the iframe the exact same position as the div it replaces. subtract the position of the
// center_content_area container, which is relatively positioned
var position = getElementPosition( this.div );
var orig_position = getElementPosition( this.iframe );
if ( repeat && position.x == orig_position.x && position.y == orig_position.y )
return;
var container_position = getElementPosition( "center_content_area" );
position.x -= container_position.x;
position.y -= container_position.y;
setElementPosition( this.iframe, position );
var self = this;
setTimeout( function () { self.reposition( true ); }, 50 );
}
Editor.prototype.start_drag = function ( event ) {
event.stop();
var note_height = 100;
mouse_position = event.mouse().page;
addElementClass( this.div, "note_div_dragging" );
// add a blank div to the area where the editor is popping out from. this lets the user easily
// see where the editor came from
var drop_target = createDOM( "div", { "class": "note_drag_source_area", "id": "note_drag_source_area" } );
insertSiblingNodesAfter( this.holder, drop_target );
var div_size = getElementDimensions( this.div );
div_size.w -= FRAME_BORDER_WIDTH * 2;
setElementDimensions( drop_target, div_size );
// add drop target divs between every note and before the first note
var holders = getElementsByTagAndClassName( "table", "note_holder" );
if ( holders[ 0 ] != this.holder ) {
drop_target = createDOM( "div", { "class": "note_drop_target" } );
insertSiblingNodesBefore( holders[ 0 ], drop_target );
setElementDimensions( drop_target, { "w": div_size.w } );
}
for ( var i in holders ) {
var holder = holders[ i ];
i = parseInt( i );
var next_holder = ( i + 1 < holders.length ) && holders[ i + 1 ] || null;
if ( holder == this.holder || next_holder == this.holder ) continue;
drop_target = createDOM( "div", { "class": "note_drop_target" } );
insertSiblingNodesAfter( holder, drop_target );
setElementDimensions( drop_target, { "w": div_size.w } );
}
// vertically reposition the editor so that at least some part of it is under the mouse cursor
var viewport_position = getViewportPosition();
var position = getElementPosition( this.div );
var new_position = null;
setElementDimensions( this.holder, { "w": getElementDimensions( this.holder ).w } );
// if the click position is above the editor, then move the top of the editor up to it
if ( mouse_position.y < position.y )
new_position = { "y": mouse_position.y };
// if the click position is below the editor, then move the bottom of the editor down to it
else if ( mouse_position.y > position.y + note_height )
new_position = { "y": mouse_position.y - note_height };
else
new_position = { "y": getElementPosition( this.holder ).y };
// save the offset of the mouse click from the top-left of the holder
this.drag_click_offset = {
"x": mouse_position.x - getElementPosition( this.holder ).x,
"y": mouse_position.y - new_position.y
};
new_position.y -= viewport_position.y;
setElementPosition( this.holder, new_position );
addElementClass( this.holder, "note_holder_dragging" );
addElementClass( this.note_controls, "invisible" );
addElementClass( this.grabber, "note_grabber_focused" );
removeElementClass( getElement( "note_shadow_" + this.id ), "undisplayed" );
signal( this, "grabber_pressed", event );
var self = this;
this.drag_signal = connect( window.document.body, "onmousemove", function ( event ) { self.drag( event ); } );
this.drop_signal = connect( window.document.body, "onmouseup", function ( event ) { self.drop( event ); } );
}
Editor.prototype.drag = function( event ) {
event.stop();
if ( this.drag_target_timer )
clearTimeout( this.drag_target_timer );
var mouse_position = event.mouse().page;
// move the editor based on the original click's offset
var viewport_position = getViewportPosition();
setElementPosition( this.holder, {
"x": mouse_position.x - this.drag_click_offset.x - viewport_position.x,
"y": mouse_position.y - this.drag_click_offset.y - viewport_position.y
} );
var self = this;
function hover_drag_targets() {
// if the editor is over any drop targets, expand and color them accordingly
var drop_targets = getElementsByTagAndClassName( "div", "note_drop_target" );
var div_position = getElementPosition( self.div );
var div_size = getElementDimensions( self.div );
for ( var i in drop_targets ) {
var drop_target = drop_targets[ i ];
var target_position = getElementPosition( drop_target );
var target_size = getElementDimensions( drop_target );
if ( WEBKIT ) {
target_position.x -= viewport_position.x;
target_position.y -= viewport_position.y;
}
// if the div is wholly above or below the drop target, then it's not overlapping it
if ( ( div_position.y < target_position.y && div_position.y + div_size.h < target_position.y ) ||
( div_position.y > target_position.y + target_size.h && div_position.y + div_size.h > target_position.y + target_size.h ) )
removeElementClass( drop_target, "note_drop_target_hover" );
else
addElementClass( drop_target, "note_drop_target_hover" );
}
}
// testing drag targets for hovering can be slow, so only do it periodically (a split second after the mouse stops moving)
this.drag_target_timer = setTimeout( function () { hover_drag_targets(); }, 10 );
this.drag_scroll( event.mouse().client );
}
Editor.prototype.drag_scroll = function( mouse_viewport_position ) {
if ( this.drag_scroll_timer )
clearTimeout( this.drag_scroll_timer );
// if the mouse is near the top or the bottom of the viewport, scroll the page accordingly. this
// allows the user to reach other notes while dragging a note
var viewport_size = getViewportDimensions();
var scroll_height = 0;
var SCROLL_TRIGGER_AREA_HEIGHT = 50;
var SCROLL_RATE = 40;
if ( mouse_viewport_position.y > viewport_size.h - SCROLL_TRIGGER_AREA_HEIGHT )
scroll_height = SCROLL_RATE;
else if ( mouse_viewport_position.y < SCROLL_TRIGGER_AREA_HEIGHT )
scroll_height = -SCROLL_RATE;
else {
return;
}
var page_top = document.body.scrollTop || window.pageYOffset;
window.scrollBy( 0, scroll_height );
var new_page_top = document.body.scrollTop || window.pageYOffset;
// if scrolling didn't work, then we're at the top or the bottom of the page, so bail
if ( page_top == new_page_top )
return;
var self = this;
this.drag_scroll_timer = setTimeout( function () { self.drag_scroll( mouse_viewport_position ); }, 50 );
}
Editor.prototype.drop = function( event ) {
disconnect( this.drag_signal );
disconnect( this.drop_signal );
if ( this.drag_scroll_timer )
clearTimeout( this.drag_scroll_timer );
if ( this.drag_target_timer )
clearTimeout( this.drag_target_timer );
removeElementClass( this.div, "note_div_dragging" );
removeElementClass( this.holder, "note_holder_dragging" );
removeElementClass( this.note_controls, "invisible" );
removeElementClass( this.grabber, "note_grabber_focused" );
addElementClass( getElement( "note_shadow_" + this.id ), "undisplayed" );
this.drag_mouse_position = null;
// if there is a hovered drop target, move the editor to it
var hover_drop_target = getFirstElementByTagAndClassName( "div", "note_drop_target_hover" );
if ( hover_drop_target ) {
setElementPosition( this.holder, getElementPosition( hover_drop_target ) );
swapDOM( hover_drop_target, this.holder );
removeElement( "note_drag_source_area" );
this.resize();
this.highlight();
signal( this, "moved", this, this.previous_editor(), this.next_editor() );
}
var drop_targets = getElementsByTagAndClassName( "div", "note_drop_target" );
for ( var i in drop_targets )
removeElement( drop_targets[ i ] );
// if there is no hovered drop target, just move the editor back to its original location
if ( !hover_drop_target ) {
var drag_source_area = getElement( "note_drag_source_area" );
setElementPosition( this.holder, getElementPosition( drag_source_area ) );
removeElement( drag_source_area );
this.resize();
this.highlight();
}
}
Editor.prototype.previous_editor = function () {
var previous_holder = this.holder.previousSibling;
while ( previous_holder && previous_holder.nodeValue == "\n" )
previous_holder = previous_holder.previousSibling;
if ( !previous_holder || !hasElementClass( previous_holder, "note_holder" ) ) return null;
var div = getFirstElementByTagAndClassName( "div", "static_note_div", previous_holder );
if ( !div || !div.editor ) return null;
return div.editor;
}
Editor.prototype.next_editor = function () {
var next_holder = this.holder.nextSibling;
while ( next_holder && next_holder.nodeValue == "\n" )
next_holder = next_holder.nextSibling;
if ( !next_holder || !hasElementClass( next_holder, "note_holder" ) ) return null;
var div = getFirstElementByTagAndClassName( "div", "static_note_div", next_holder );
if ( !div || !div.editor ) return null;
return div.editor;
}
Editor.prototype.key_pressed = function ( event ) {
signal( this, "key_pressed", this, event );
this.resize();
}
Editor.prototype.key_released = function ( event ) {
this.resize();
// if ctrl keys are released, bail
var code = event.key().code;
var CTRL = 17;
var NONE = 0;
if ( event.modifier().ctrl || code == CTRL || code == NONE )
return;
this.cleanup_html( code );
signal( this, "state_changed", this, false );
}
Editor.prototype.cleanup_html = function ( key_code ) {
if ( WEBKIT ) {
// if enter is pressed while in a title, end title mode, since WebKit doesn't do that for us
var ENTER = 13; BACKSPACE = 8;
if ( key_code == ENTER && this.state_enabled( "h3" ) )
this.exec_command( "h3" );
// if backspace is pressed, skip WebKit style scrubbing since it can cause problems
if ( key_code == BACKSPACE )
return null;
// as of this writing, WebKit doesn't support execCommand( "styleWithCSS" ). for more info, see
// https://bugs.webkit.org/show_bug.cgi?id=13490
// so to make up for this shortcoming, manually scrub WebKit style spans and other nodes,
// replacing them with appropriate tags
var style_spans = getElementsByTagAndClassName( "span", null, this.document );
var underlines = getElementsByTagAndClassName( "u", null, this.document );
var strikethroughs = getElementsByTagAndClassName( "strike", null, this.document );
var fonts = getElementsByTagAndClassName( "font", "Apple-style-span", this.document );
var nodes = style_spans.concat( underlines ).concat( strikethroughs ).concat( fonts );
for ( var i in nodes ) {
var node = nodes[ i ];
if ( !node ) continue;
var style = node.getAttribute( "style" );
node.removeAttribute( "class" );
if ( style == undefined && node.tagName != "font" && node.tagName != "FONT" )
continue;
if ( getStyle( node, "color" ) || getStyle( node, "background-color" ) )
continue;
var replacement = withDocument( this.document, function () {
// font-size is set when ending title mode
if ( style.indexOf( "font-size: " ) != -1 )
return null;
if ( style.indexOf( "text-decoration: none;" ) != -1 || style.length == 0 )
return createDOM( "span" );
if ( style.indexOf( "font-weight: bold;" ) != -1 )
return createDOM( "b" );
if ( style.indexOf( "font-style: italic;" ) != -1 )
return createDOM( "i" );
if ( style.indexOf( "text-decoration: underline;" ) != -1 )
return createDOM( "u" );
if ( style.indexOf( "text-decoration: line-through;" ) != -1 )
return createDOM( "strike" );
return null;
} );
if ( replacement ) {
var selection = this.iframe.contentWindow.getSelection();
var anchor = selection.anchorNode;
var offset = selection.anchorOffset;
swapDOM( node, replacement );
appendChildNodes( replacement, node.childNodes );
// necessary to prevent the text cursor from disappearing as the node containing it is replaced
selection.collapse( anchor, offset );
} else {
node.removeAttribute( "style" );
}
}
}
// the rest only applies to Firefox and other Gecko-based browsers
if ( !GECKO )
return;
// if you're typing the text of an <h3> title and you hit enter, the text cursor will skip a line
// and then move back up a line when you start typing again. to prevent this behavior, remove an
// extra <br> tag when this situation is detected before the current node: <h3><br>
if ( this.iframe.contentWindow && this.iframe.contentWindow.getSelection ) {
var selection = this.iframe.contentWindow.getSelection();
var range = selection.getRangeAt( 0 );
var startOffset = range.startOffset;
var node = range.startContainer.childNodes[ startOffset ];
if ( node && node.previousSibling && node.previousSibling.previousSibling &&
node.previousSibling.nodeName == "BR" &&
node.previousSibling.previousSibling.nodeName == "H3" ) {
removeElement( node.previousSibling );
if ( node.nodeName != "BR" )
insertSiblingNodesBefore( node, createDOM( "br" ) );
else
this.resize();
}
}
}
Editor.prototype.cleanup_range = function () {
if ( this.iframe && this.iframe.contentWindow.getSelection ) {
var selection = this.iframe.contentWindow.getSelection();
if ( selection.isCollapsed )
this.exec_command( "removeformat" );
}
}
Editor.prototype.unformat_selection = function () {
if ( !this.iframe || !this.document )
return false;
// if the selection is collapsed, then there is nothing to unformat
if ( this.iframe.contentWindow && this.iframe.contentWindow.getSelection ) { // browsers such as Firefox
var selection = this.iframe.contentWindow.getSelection();
var range = selection.getRangeAt( 0 );
if ( range.collapsed )
return false;
} else if ( this.document.selection ) { // browsers such as IE
var range = this.document.selection.createRange();
var collapsed_range = range.duplicate();
collapsed_range.collapse();
if ( range.isEqual( collapsed_range ) )
return false;
}
// first, remove all standard formatting (<b>, <i>, etc.)
this.exec_command( "removeformat" );
// then, remove all other "formatting" that removeformat doesn't touch (<h1>, <h2>, etc.)
var nodes =
getElementsByTagAndClassName( "h1", null, this.document ).concat(
getElementsByTagAndClassName( "h2", null, this.document ) ).concat(
getElementsByTagAndClassName( "h3", null, this.document ) ).concat(
getElementsByTagAndClassName( "h4", null, this.document ) ).concat(
getElementsByTagAndClassName( "h5", null, this.document ) ).concat(
getElementsByTagAndClassName( "h6", null, this.document ) );
for ( var i in nodes ) {
var node = nodes[ i ];
if ( !node ) continue;
// before proceeding, make sure the node is within the selected text
if ( selection && selection.containsNode ) { // browsers such as Firefox
if ( !selection.containsNode( node, true ) )
continue;
} else if ( this.document.selection ) {
var node_range = this.document.selection.createRange();
node_range.moveToElementText( node );
if ( !range.inRange( node_range ) )
continue;
}
var replacement = withDocument( this.document, function () { return createDOM( "span" ); } );
swapDOM( node, replacement );
appendChildNodes( replacement, node.childNodes );
}
return true;
}
Editor.prototype.mouse_released = function ( event ) {
this.link_started = null;
var self = this;
function handle_click( event ) {
// we only want to deal with left mouse button clicks
if ( event.mouse().button.right )
return false;
// search through the tree of elements containing the clicked target. if a link isn't found, bail
var link = event.target()
if ( !link ) false;
while ( link.nodeName != "A" ) {
link = link.parentNode;
if ( !link )
return false;
}
if ( !link.href ) return false;
var query = parse_query( link );
var id = query.note_id;
// special case for links to uploaded files
if ( !link.target && /\/files\//.test( link.href ) ) {
if ( !/\/files\/new$/.test( link.href ) ) {
window.open( link.href );
}
return true;
}
// middle click opens the link in a new window
if ( event.mouse().button.middle ) {
window.open( link.href );
return true;
}
// links with targets are considered to be external links pointing outside of this wiki
if ( link.target || id == undefined ) {
// if this is a read-only editor and the link target is "_top", go to the link's URL directly
if ( !self.edit_enabled && ( link.target == "_top" || !link.target ) ) {
window.location = link.href;
return true;
}
// launch the external link ourselves, assuming that its target is "_new"
window.open( link.href );
if ( !link.target )
link.target = "_top";
return true;
}
// load the note corresponding to the clicked link
var title = link_title( link, query );
signal( self, "load_editor", title, id, null, null, link, self.holder );
return true;
}
var link_clicked = handle_click( event );
if ( this.edit_enabled ) {
// if no link was clicked, then make the clicked editor into an iframe
if ( !link_clicked && this.div ) {
this.init_focus = true;
this.claim_iframe( null );
}
// in case the cursor has moved, update the state
signal( this, "state_changed", this, link_clicked );
}
}
Editor.prototype.mouse_clicked = function ( event ) {
if ( event.mouse().button.middle || event.mouse().button.right )
return;
var target = event.target();
if ( !target ) return;
var tag_name = target.tagName;
if ( !tag_name ) return;
tag_name = tag_name.toLowerCase();
// allow clicks on buttons, labels, and input fields
if ( tag_name == "button" || tag_name == "label" || tag_name == "input" )
return;
// block all other clicks (e.g. on links, to prevent the browser from handling link clicks itself)
event.stop();
}
HOVER_DURATION_MILLISECONDS = 1000;
Editor.prototype.mouse_hovered = function ( event ) {
// ignore mouse hover events for static div notes
if ( !this.iframe )
return;
// search through the tree of elements containing the hover target for a link
var link = event.target()
if ( !link ) false;
while ( link.nodeName != "A" ) {
link = link.parentNode;
if ( !link )
break;
}
if ( !link || !link.href )
link = null;
var self = this;
var hover_target = link || event.target();
this.hover_target = hover_target;
if ( this.hover_timer )
clearTimeout( this.hover_timer );
this.hover_timer = setTimeout( function () { self.mouse_hover_timeout( hover_target ) }, HOVER_DURATION_MILLISECONDS );
}
Editor.prototype.mouse_hover_timeout = function ( hover_target ) {
// if the mouse is hovering over the same target that it was when the timer started
if ( hover_target == this.hover_target && this.iframe )
signal( this, "mouse_hovered", hover_target );
}
Editor.prototype.mouse_dragged = function ( event ) {
// reset the hover timer to prevent a mouse hover from being registered while the mouse is being dragged
if ( this.hover_timer ) {
var self = this;
clearTimeout( this.hover_timer );
this.hover_timer = setTimeout( function () { self.mouse_hover_timeout( self.hover_target ) }, HOVER_DURATION_MILLISECONDS );
}
}
Editor.prototype.scrape_title = function () {
// scrape the note title out of the editor
var heading = getFirstElementByTagAndClassName( "h3", null, this.document || this.div );
if ( heading )
var title = scrapeText( heading );
else
var title = "";
// issue a signal that the title has changed and save off the new title
if ( this.edit_enabled )
signal( this, "title_changed", this, this.title, title );
this.title = title;
}
Editor.title_placeholder_char = "\u200b";
Editor.title_placeholder_pattern = /\u200b/g;
Editor.title_placeholder_html = "&#8203;&#8203;";
Editor.prototype.empty = function () {
if ( this.iframe && this.document && this.document.body )
var node = this.document.body;
else if ( this.div )
var node = this.div;
else
return true;
return ( scrapeText( node ).replace( Editor.title_placeholder_pattern, "" ).length == 0 );
}
Editor.prototype.insert_link = function ( url ) {
// get the current selection, which is the link title
if ( this.iframe.contentWindow && this.iframe.contentWindow.getSelection ) { // browsers such as Firefox
var selection = this.iframe.contentWindow.getSelection();
// if no text is selected, then insert a link with two zero-width spaces as the title. then,
// position the text cursor between the two zero-width spaces. yes, this really is necessary.
// it ensures that the next character typed in WebKit becomes part of the link title.
if ( selection.toString().length == 0 ) {
this.insert_html( '<a href="' + url + '" id="new_link">' + Editor.title_placeholder_html + '</a>' );
var link = withDocument( this.document, function () { return getElement( "new_link" ); } );
link.removeAttribute( "id" );
selection.selectAllChildren( link );
selection.collapse( link.firstChild, 1 );
this.link_started = link;
// otherwise, just create a link with the selected text as the link title
} else {
this.link_started = null;
this.exec_command( "createLink", url );
return this.find_link_at_cursor();
}
} else if ( this.document.selection ) { // browsers such as IE
var range = this.document.selection.createRange();
// if no text is selected, then insert a link with a placeholder space as the link title, and
// then select it
if ( range.text.length == 0 ) {
range.text = " ";
range.moveStart( "character", -1 );
range.select();
this.exec_command( "createLink", url );
this.link_started = this.find_link_at_cursor();
} else {
this.link_started = null;
this.exec_command( "createLink", url );
return this.find_link_at_cursor();
}
}
}
Editor.prototype.start_link = function () {
return this.insert_link( "/notebooks/" + this.notebook_id + "?note_id=new" );
}
Editor.prototype.start_file_link = function () {
return this.insert_link( "/files/new" );
}
Editor.prototype.end_link = function () {
this.link_started = null;
var link = this.find_link_at_cursor();
if ( this.iframe.contentWindow && this.iframe.contentWindow.getSelection ) { // browsers such as Firefox
this.exec_command( "unlink" );
// necessary to actually end a link. the side-effect is that the cursor jumps to the
// end of the link if it's not already there
if ( link ) {
var selection = this.iframe.contentWindow.getSelection();
var sentinel = this.document.createTextNode( Editor.title_placeholder_char );
insertSiblingNodesAfter( link, sentinel );
selection.collapse( sentinel, 1 );
}
} else if ( this.document.selection ) { // browsers such as IE
// if some text is already selected, unlink it and bail
var range = this.document.selection.createRange();
if ( range.text.length > 0 ) {
this.exec_command( "unlink" );
return;
}
// since execCommand() with "unlink" removes the entire link instead of just ending it, fake it
// by appending a temporary span, selecting it, and then immediately removing it
var span = this.document.createElement( "span" );
span.innerHTML = "&nbsp;";
range.parentElement().appendChild( span );
range.moveToElementText( span );
range.select();
range.pasteHTML( "" );
}
return link;
}
Editor.prototype.find_link_at_cursor = function () {
if ( this.iframe && this.iframe.contentWindow && this.iframe.contentWindow.getSelection ) { // browsers such as Firefox
var selection = this.iframe.contentWindow.getSelection();
var link = selection.anchorNode;
if ( !link ) return null;
while ( link.nodeName != "A" ) {
link = link.parentNode;
if ( !link )
break;
}
if ( link != this.link_started )
this.link_started = null;
if ( link ) return link;
// well, that didn't work, so try the selection's focus node instead
link = selection.focusNode;
while ( link.nodeName != "A" ) {
link = link.parentNode;
if ( !link ) {
this.link_started = null;
return null;
}
}
if ( link != this.link_started )
this.link_started = null;
return link;
} else if ( this.document && this.document.selection ) { // browsers such as IE
var range = this.document.selection.createRange();
var link = range.parentElement();
while ( link.nodeName != "A" ) {
link = link.parentNode;
if ( !link ) {
this.link_started = null;
return null;
}
}
if ( link != this.link_started )
this.link_started = null;
return link;
}
this.link_started = null;
return null;
}
Editor.prototype.focus = function ( suppress_signal ) {
if ( this.div && this.edit_enabled )
this.claim_iframe();
if ( this.iframe ) {
addElementClass( this.iframe, "focused_note_frame" );
if ( OPERA )
this.iframe.focus();
else
this.iframe.contentWindow.focus();
}
if ( !suppress_signal )
signal( this, "focused", this );
}
Editor.prototype.blur = function () {
this.scrape_title();
removeElementClass( this.iframe || this.div, "focused_note_frame" );
if ( this.grabber )
removeElementClass( this.grabber, "note_grabber_focused" );
}
Editor.prototype.release_iframe = function () {
if ( !this.iframe )
return;
var contents = this.contents();
disconnectAll( this.iframe.contentWindow );
disconnectAll( this.iframe );
disconnectAll( this.document.body );
disconnectAll( this.document );
this.iframe.editor = null;
this.document = null;
var static_contents = getFirstElementByTagAndClassName( "span", "static_note_contents", this.div );
if ( static_contents )
static_contents.innerHTML = contents;
removeElementClass( this.div, "invisible" );
addElementClass( this.iframe, "invisible" );
setElementDimensions( this.iframe, { "h": 0 } );
this.iframe = null;
}
Editor.prototype.contents = function () {
if ( this.iframe && this.document && this.document.body )
return this.document.body.innerHTML;
if ( this.div ) {
var static_contents = getFirstElementByTagAndClassName( "span", "static_note_contents", this.div );
if ( static_contents )
return static_contents.innerHTML;
}
return this.initial_text || "";
}
// return true if the given state_name is currently enabled, optionally using a given list of node
// names
Editor.prototype.state_enabled = function ( state_name, node_names, attribute_name ) {
if ( !this.edit_enabled )
return false;
state_name = state_name.toLowerCase();
if ( !node_names )
node_names = this.current_node_names();
for ( var i in node_names ) {
var node_name = node_names[ i ];
if ( node_name == state_name )
return true;
}
return false;
}
DEFAULT_FOREGROUND_CODE = "#000000";
DEFAULT_BACKGROUND_CODE = "#ffffff";
WEBKIT_DEFAULT_COLOR_CODE = "rgba(0, 0, 0, 0)";
// return a list of names for all the nodes containing the cursor
Editor.prototype.current_node_names = function () {
var node_names = new Array();
if ( !this.edit_enabled || !this.iframe || !this.document )
return node_names;
// to determine whether the specified state is enabled, see whether the current selection is
// contained (directly or indirectly) by a node of the appropriate type (e.g. "h3", "a", etc.)
var node;
if ( window.getSelection ) { // browsers such as Firefox
var selection = this.iframe.contentWindow.getSelection();
if ( selection.rangeCount > 0 )
var range = selection.getRangeAt( 0 );
else
var range = this.document.createRange();
node = range.endContainer;
} else if ( this.document.selection ) { // browsers such as IE
var range = this.document.selection.createRange();
node = range.parentElement();
}
while ( node ) {
var name = node.nodeName.toLowerCase();
if ( name == "body" )
break;
else if ( name == "strong" ) name = "b";
else if ( name == "em" ) name = "i";
else if ( name == "font" && node.getAttribute( "face" ) )
name = "fontface";
else if ( name == "font" && node.getAttribute( "size" ) )
name = "fontsize";
else if ( name == "font" && node.getAttribute( "color" ) )
name = "color";
else if ( name == "span" || name == "font" ) {
var color = getStyle( node, "color" );
var bg_color = getStyle( node, "background-color" );
if ( ( color && color != "transparent" && color != DEFAULT_FOREGROUND_CODE ) ||
( bg_color && bg_color != "transparent" && bg_color != DEFAULT_BACKGROUND_CODE ) )
name = "color";
}
if ( name != "a" || node.href )
node_names.push( name );
node = node.parentNode;
}
return node_names;
}
// return the current effective foreground and background colors as hex code strings
Editor.prototype.current_colors = function () {
var foreground = null;
var background = null;
if ( !this.edit_enabled || !this.iframe || !this.document )
return [ null, null ];
var node;
if ( window.getSelection ) { // browsers such as Firefox
var selection = this.iframe.contentWindow.getSelection();
if ( selection.rangeCount > 0 )
var range = selection.getRangeAt( 0 );
else
var range = this.document.createRange();
node = range.endContainer;
} else if ( this.document.selection ) { // browsers such as IE
var range = this.document.selection.createRange();
node = range.parentElement();
}
while ( node ) {
var name = node.nodeName.toLowerCase();
if ( name == "body" )
break;
if ( foreground == null && name == "font" && node.getAttribute( "color" ) ) {
foreground = node.getAttribute( "color" );
} else if ( name == "span" || name == "font" || name == "h3" ) {
if ( foreground == null ) {
foreground = getStyle( node, "color" )
if ( foreground == "transparent" || foreground == DEFAULT_FOREGROUND_CODE ||
foreground == WEBKIT_DEFAULT_COLOR_CODE )
foreground = null;
}
if ( background == null ) {
background = getStyle( node, "background-color" )
if ( background == "transparent" || background == DEFAULT_BACKGROUND_CODE ||
background == WEBKIT_DEFAULT_COLOR_CODE )
background = null;
}
}
if ( foreground && background )
break;
node = node.parentNode;
}
return [
foreground ? Color.fromString( foreground ).toHexString() : null,
background ? Color.fromString( background ).toHexString() : null
];
}
Editor.prototype.set_foreground_color = function( color_code ) {
if ( GECKO ) this.exec_command( "styleWithCSS", true );
this.exec_command( "forecolor", Color.fromString( color_code ).toHexString() );
if ( GECKO ) this.exec_command( "styleWithCSS", false );
this.cleanup_color_html();
}
Editor.prototype.set_background_color = function( color_code ) {
if ( GECKO ) this.exec_command( "styleWithCSS", true );
if ( MSIE )
this.exec_command( "backcolor", Color.fromString( color_code ).toHexString() );
else
this.exec_command( "hilitecolor", Color.fromString( color_code ).toHexString() );
if ( GECKO ) this.exec_command( "styleWithCSS", false );
this.cleanup_color_html();
}
Editor.prototype.cleanup_color_html = function () {
var fonts = getElementsByTagAndClassName( "font", null, this.document );
// if we somehow end up with both a color attribute and a CSS style on a particular <font>
// element, then remove the color attribute
if ( !MSIE ) {
for ( var i in fonts ) {
var node = fonts[ i ];
if ( node.hasAttribute( "style" ) && node.hasAttribute( "color" ) )
node.removeAttribute( "color" );
}
return;
}
// for some reason, IE likes to add <font size=+0> tags when changing colors, which for some
// reason appears to slightly increase the rendered font size
for ( var i in fonts ) {
var node = fonts[ i ];
var size = node.getAttribute( "size" );
if ( size == "+0" ) {
node.removeAttribute( "size" );
// unless there is at least one attribute, IE will add the "size=+0" right back on
addElementClass( node, "nosize" );
}
}
}
Editor.prototype.shutdown = function( event ) {
signal( this, "title_changed", this, this.title, null );
this.closed = true;
var note_controls = this.note_controls;
if ( this.iframe ) {
var iframe = this.iframe;
// keeping a reference to the iframe allows removeElement( editor_node ) below to work in IE 6
if ( !MSIE6 )
this.iframe = null;
disconnectAll( this );
disconnectAll( this.delete_button );
disconnectAll( this.changes_button );
disconnectAll( this.tools_button );
disconnectAll( this.hide_button );
disconnectAll( this.grabber );
disconnectAll( iframe );
}
if ( this.document ) {
disconnectAll( this.document.body );
disconnectAll( this.document );
}
disconnectAll( this.div );
var holder = this.holder;
blindUp( this.div, options = { "duration": 0.25, afterFinish: function () {
try {
removeElement( holder );
} catch ( e ) { }
} } );
if ( !iframe )
return;
// overriding afterFinishInternal for the iframe prevents it from being set to "display: none",
// which would break subsequent getSelection() calls
iframe.editor = null;
blindUp( iframe, options = { "duration": 0.25, afterFinishInternal: function () {
try {
addElementClass( iframe, "invisible" );
} catch ( e ) { }
} } );
}
Editor.prototype.summarize = function () {
if ( this.document && this.document.body )
return summarize_html( scrapeText( this.document.body ), this.title );
if ( this.div )
return summarize_html( scrapeText( this.div ), this.title );
return "";
}
function summarize_html( html, title ) {
var span = createDOM( "span", {} );
span.innerHTML = html;
var summary = strip( scrapeText( span ) );
// remove the title (if any) from the summary text
if ( title && summary.indexOf( title ) == 0 )
summary = summary.substr( title.length );
if ( summary.length == 0 )
return null;
var MAX_SUMMARY_LENGTH = 40;
var word_count = 10;
// split the summary on whitespace
var words = summary.split( /\s+/ );
function first_words( words, word_count ) {
return words.slice( 0, word_count ).join( " " );
}
var truncated = false;
summary = first_words( words, word_count );
// find a summary less than MAX_SUMMARY_LENGTH and, if possible, truncated on a word boundary
while ( summary.length > MAX_SUMMARY_LENGTH ) {
word_count -= 1;
summary = first_words( words, word_count );
// if the first word is just ridiculously long, truncate it without finding a word boundary
if ( word_count == 1 ) {
summary = summary.substr( 0, MAX_SUMMARY_LENGTH );
truncated = true;
break;
}
}
if ( truncated || word_count < words.length )
summary += " ...";
return summary;
}
// return the given html in a normal form. this makes html string comparisons more accurate
function normalize_html( html ) {
if ( !html ) return html;
// remove any "pulldown" attributes, which get added in IE whenever link.pulldown is set
var normal_html = html.replace( /\s+pulldown="null"/g, "" );
// convert absolute URLs to the server into relative URLs. accomplish this by removing, for
// instance, "https://luminotes.com" from any URLs. this is necessary becuase IE insists on
// converting relative link URLs to absolute URLs
var base_url = window.location.protocol + "//" + window.location.host;
normal_html = normal_html.replace( '="' + base_url + '/', '="/' );
return normal_html;
}
Editor.prototype.dirty = function () {
var original_html = normalize_html( this.initial_text )
var current_html = normalize_html( this.contents() );
if ( current_html == "" || current_html == original_html )
return false;
return true;
}
Editor.prototype.mark_clean = function () {
this.initial_text = this.contents();
}
Editor.prototype.mark_dirty = function () {
this.initial_text = null;
}
// convenience function for parsing a link that has an href URL containing a query string
function parse_query( link ) {
if ( !link || !link.href )
return new Array();
return parseQueryString( link.href.split( "?" ).pop() );
}
// convenience function for getting a link's title (stripped of whitespace), either from a query
// argument in the href, from the actual link title, or from the link's href
function link_title( link, query ) {
if ( link && link.target )
return link.href;
if ( !query )
query = parse_query( link );
var link_title = strip( query.title || scrapeText( link ) );
// work around an IE quirk in which link titles are sometimes 0xa0
if ( link_title.charCodeAt( 0 ) == 160 )
return "";
return link_title.replace( Editor.title_placeholder_pattern, "" );
}
function normalize_title( title ) {
return title.replace( Editor.title_placeholder_pattern, "" ) || "untitled note";
}
function editor_by_id( note_id, revision ) {
if ( revision ) {
var iframe = getElement( "note_" + note_id + " " + revision );
if ( !iframe && getElement( "note_" + note_id ) )
return null;
} else {
var iframe = getElement( "note_" + note_id );
}
if ( iframe )
return iframe.editor;
var div = getElement( "static_note_" + note_id );
if ( div ) {
if ( revision && div.editor && div.editor.revision != revision )
return null;
return div.editor;
}
return null;
}
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