715 lines
24 KiB
JavaScript
715 lines
24 KiB
JavaScript
function Editor( id, notebook_id, note_text, deleted_from_id, revision, read_write, startup, highlight, focus, position_after ) {
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this.id = id;
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this.notebook_id = notebook_id;
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this.initial_text = note_text;
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this.deleted_from_id = deleted_from_id || null;
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this.revision = revision;
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this.user_revisions = new Array(); // cache for this note's list of revisions, loaded from the server on-demand
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this.read_write = read_write; // whether the user has read-write access to this Editor
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this.edit_enabled = read_write && !deleted_from_id; // whether editing is actually enabled for this Editor
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this.startup = startup || false; // whether this Editor is for a startup note
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this.init_highlight = highlight || false;
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this.init_focus = focus || false;
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this.closed = false;
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this.link_started = null;
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this.gecko = /Gecko/.test( navigator.userAgent ) && !/like Gecko/.test( navigator.userAgent );
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var iframe_id = "note_" + id;
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var self = this;
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this.document = null;
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this.iframe = createDOM( "iframe", {
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"src": "/static/html/blank_note.html",
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"frameBorder": "0",
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"scrolling": "no",
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"id": iframe_id,
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"name": iframe_id,
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"class": "note_frame",
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"onresize": function () { setTimeout( function () { self.resize() }, 50 ); },
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"onload": function () { setTimeout( function () { self.resize() }, 250 ); }
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} );
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this.iframe.editor = this;
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this.title = "";
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if ( read_write ) {
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this.delete_button = createDOM( "input", {
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"type": "button",
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"class": "note_button",
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"id": "delete_" + iframe_id,
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"value": "delete" + ( this.deleted_from_id ? " forever" : "" ),
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"title": "delete note [ctrl-d]"
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} );
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connect( this.delete_button, "onclick", function ( event ) { signal( self, "delete_clicked", event ); } );
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if ( this.deleted_from_id ) {
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this.undelete_button = createDOM( "input", {
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"type": "button",
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"class": "note_button",
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"id": "undelete_" + iframe_id,
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"value": "undelete",
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"title": "undelete note"
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} );
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connect( this.undelete_button, "onclick", function ( event ) { signal( self, "undelete_clicked", event ); } );
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} else {
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this.changes_button = createDOM( "input", {
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"type": "button",
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"class": "note_button",
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"id": "changes_" + iframe_id,
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"value": "changes",
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"title": "previous revisions"
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} );
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connect( this.changes_button, "onclick", function ( event ) { signal( self, "changes_clicked", event ); } );
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this.options_button = createDOM( "input", {
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"type": "button",
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"class": "note_button",
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"id": "options_" + iframe_id,
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"value": "options",
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"title": "note options"
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} );
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connect( this.options_button, "onclick", function ( event ) { signal( self, "options_clicked", event ); } );
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}
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}
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if ( !this.deleted_from_id && ( read_write || !startup ) ) {
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this.hide_button = createDOM( "input", {
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"type": "button",
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"class": "note_button",
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"id": "hide_" + iframe_id,
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"value": "hide",
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"title": "hide note [ctrl-h]"
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} );
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connect( this.hide_button, "onclick", function ( event ) { signal( self, "hide_clicked", event ); } );
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}
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this.note_controls = createDOM( "span", { "class": "note_controls" },
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this.delete_button ? this.delete_button : null,
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this.delete_button ? " " : null,
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this.changes_button ? this.changes_button : null,
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this.changes_button ? " " : null,
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this.options_button ? this.options_button : null,
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this.options_button ? " " : null,
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this.undelete_button ? this.undelete_button : null,
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this.undelete_button ? " " : null,
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this.hide_button ? this.hide_button : null
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);
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if ( position_after ) {
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insertSiblingNodesAfter( position_after, this.note_controls );
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insertSiblingNodesAfter( this.note_controls, this.iframe );
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} else {
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appendChildNodes( "notes", this.note_controls );
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appendChildNodes( "notes", this.iframe );
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}
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connect( this.iframe, "onload", function ( event ) { self.init_document(); } );
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}
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// second stage of construction, invoked by editor_loaded(). do not call directly
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Editor.prototype.init_document = function () {
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var self = this; // necessary so that the member functions of this editor object are used
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if ( this.iframe.contentDocument ) { // browsers such as Firefox
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this.document = this.iframe.contentDocument;
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if ( this.edit_enabled )
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this.document.designMode = "On";
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setTimeout( function () { self.finish_init(); }, 1 );
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} else { // browsers such as IE
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this.document = this.iframe.contentWindow.document;
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if ( this.edit_enabled ) {
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this.document.designMode = "On";
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// work-around for IE bug: reget the document after designMode is turned on
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this.document = this.iframe.contentWindow.document;
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}
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setTimeout( function () { self.finish_init(); }, 100 );
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}
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}
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// third and final stage of construction, invoked by init_document(). do not call directly
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Editor.prototype.finish_init = function () {
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if ( !this.initial_text )
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this.initial_text = "<h3>";
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this.insert_html( this.initial_text );
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var self = this; // necessary so that the member functions of this editor object are used
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if ( this.edit_enabled ) {
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connect( this.document, "onkeydown", function ( event ) { self.key_pressed( event ); } );
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connect( this.document, "onkeyup", function ( event ) { self.key_released( event ); } );
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}
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connect( this.document, "onblur", function ( event ) { self.blurred( event ); } );
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connect( this.document, "onfocus", function ( event ) { self.focused( event ); } );
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connect( this.document.body, "onblur", function ( event ) { self.blurred( event ); } );
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connect( this.document.body, "onfocus", function ( event ) { self.focused( event ); } );
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connect( this.iframe.contentWindow, "onblur", function ( event ) { self.blurred( event ); } );
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connect( this.iframe.contentWindow, "onfocus", function ( event ) { self.focused( event ); } );
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// special case: don't handle mouse click for share_notebook magic note, so radio button links
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// work as intended
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if ( this.id != "share_notebook" )
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connect( this.document, "onclick", function ( event ) { self.mouse_clicked( event ); } );
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// special-case: connect any submit buttons within the contents of this note
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withDocument( this.document, function () {
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var signup_button = getElement( "signup_button" );
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if ( signup_button ) {
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var signup_form = getElement( "signup_form" );
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connect( signup_button, "onclick", function ( event ) {
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signal( self, "submit_form", "/users/signup", signup_form ); event.stop();
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} );
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}
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var login_button = getElement( "login_button" );
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if ( login_button ) {
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var login_form = getElement( "login_form" );
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connect( login_button, "onclick", function ( event ) {
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signal( self, "submit_form", "/users/login", login_form ); event.stop();
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} );
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}
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var send_reset_button = getElement( "send_reset_button" );
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if ( send_reset_button ) {
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var send_reset_form = getElement( "send_reset_form" );
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connect( send_reset_button, "onclick", function ( event ) {
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signal( self, "submit_form", "/users/send_reset", send_reset_form ); event.stop();
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} );
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}
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var reset_button = getElement( "reset_button" );
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if ( reset_button ) {
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var reset_form = getElement( "reset_form" );
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connect( reset_button, "onclick", function ( event ) {
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signal( self, "submit_form", "/users/reset_password", reset_form ); event.stop();
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} );
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}
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var invite_button = getElement( "invite_button" );
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if ( invite_button ) {
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var invite_form = getElement( "invite_form" );
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connect( invite_button, "onclick", function ( event ) {
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signal( self, "submit_form", "/users/send_invites", invite_form, function ( result ) {
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if ( !result.invites ) return;
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signal( self, "invites_updated", result.invites );
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} );
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event.stop();
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} );
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function connect_button( revoke_button, invite_id ) {
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connect( revoke_button, "onclick", function ( event ) {
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signal( self, "revoke_invite", invite_id, function ( result ) {
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if ( !result.invites ) return;
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signal( self, "invites_updated", result.invites );
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} );
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event.stop();
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} );
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}
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var revoke_buttons = getElementsByTagAndClassName( "input", "revoke_button" );
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for ( var i in revoke_buttons ) {
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var revoke_button = revoke_buttons[ i ];
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var invite_id = revoke_button.id.split( "_" ).pop();
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connect_button( revoke_button, invite_id );
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}
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}
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} );
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// browsers such as Firefox, but not Opera
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if ( this.iframe.contentDocument && !/Opera/.test( navigator.userAgent ) && this.edit_enabled )
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this.exec_command( "styleWithCSS", false );
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this.resize();
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if ( this.init_highlight ) self.highlight();
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this.scrape_title();
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if ( this.init_focus ) {
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this.focus();
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// special-case: focus any username field
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var username = withDocument( this.document, function () { return getElement( "username" ); } );
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if ( username )
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username.focus();
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}
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signal( self, "init_complete" );
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}
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Editor.prototype.highlight = function ( scroll ) {
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if ( scroll == undefined )
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scroll = true;
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if ( scroll ) {
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// if the editor is already completely on-screen, then there's no need to scroll
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var viewport_position = getViewportPosition();
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if ( getElementPosition( this.note_controls ).y < viewport_position.y ||
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getElementPosition( this.iframe ).y + getElementDimensions( this.iframe ).h > viewport_position.y + getViewportDimensions().h )
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new ScrollTo( this.note_controls );
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}
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if ( /Opera/.test( navigator.userAgent ) ) { // MochiKit's Highlight for iframes is broken in Opera
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pulsate( this.iframe, options = { "pulses": 1, "duration": 0.5 } );
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} else if ( this.iframe.contentDocument ) { // browsers such as Firefox
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Highlight( this.iframe, options = { "queue": { "scope": "highlight", "limit": 1 } } );
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} else { // browsers such as IE
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if ( this.document && this.document.body )
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Highlight( this.document.body, options = { "queue": { "scope": "highlight", "limit": 1 } } );
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}
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}
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Editor.prototype.exec_command = function ( command, parameter ) {
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command = command.toLowerCase();
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if ( command == "h3" ) {
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if ( this.state_enabled( "h3" ) )
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this.document.execCommand( "formatblock", false, "normal" );
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else
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this.document.execCommand( "formatblock", false, "<h3>" );
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return;
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}
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this.document.execCommand( command, false, parameter );
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}
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Editor.prototype.insert_html = function ( html ) {
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if ( html.length == 0 ) return;
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if ( !this.edit_enabled || /Safari/.test( navigator.userAgent ) ) {
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this.document.body.innerHTML = html;
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return;
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}
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try { // browsers supporting insertHTML command, such as Firefox
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this.document.execCommand( "insertHTML", false, html );
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} catch ( e ) { // browsers that don't support insertHTML, such as IE
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this.document.body.innerHTML = html;
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}
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}
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// resize the editor's frame to fit the dimensions of its content
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Editor.prototype.resize = function () {
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var dimensions;
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// TODO: find a better way to determine which dimensions to use than just checking for contentDocument
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if ( this.iframe.contentDocument ) { // Firefox
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dimensions = { "h": elementDimensions( this.document.documentElement ).h };
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} else { // IE
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if ( !this.document ) return;
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dimensions = { "h": this.document.body.scrollHeight };
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}
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setElementDimensions( this.iframe, dimensions );
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}
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Editor.prototype.key_pressed = function ( event ) {
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signal( this, "key_pressed", this, event );
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this.resize();
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}
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Editor.prototype.key_released = function ( event ) {
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this.resize();
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// if ctrl keys are released, bail
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var code = event.key().code;
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var CTRL = 17;
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if ( event.modifier().ctrl || code == CTRL )
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return;
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this.cleanup_html();
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signal( this, "state_changed", this );
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}
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Editor.prototype.cleanup_html = function () {
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// this only applies to Firefox and other Gecko-based browsers
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if ( !this.gecko )
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return;
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// if you're typing the text of an <h3> title and you hit enter, the text cursor will skip a line
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// and then move back up a line when you start typing again. to prevent this behavior, remove an
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// extra <br> tag when this situation is detected before the current node: <h3><br>
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if ( this.iframe.contentWindow && this.iframe.contentWindow.getSelection ) {
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var selection = this.iframe.contentWindow.getSelection();
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var range = selection.getRangeAt( 0 );
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var startOffset = range.startOffset;
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var node = range.startContainer.childNodes[ startOffset ];
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if ( node && node.previousSibling && node.previousSibling.previousSibling &&
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node.previousSibling.nodeName == "BR" &&
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node.previousSibling.previousSibling.nodeName == "H3" ) {
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removeElement( node.previousSibling );
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if ( node.nodeName != "BR" )
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insertSiblingNodesBefore( node, createDOM( "br" ) );
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else
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this.resize();
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}
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}
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}
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Editor.prototype.mouse_clicked = function ( event ) {
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this.link_started = null;
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// update the state no matter what, in case the cursor has moved
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if ( this.edit_enabled )
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signal( this, "state_changed", this );
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// we only want to deal with left mouse button clicks
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if ( event.mouse().button.middle || event.mouse().button.right )
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return;
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// search through the tree of elements containing the clicked target. if a link isn't found, bail
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var link = event.target()
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while ( link.nodeName != "A" ) {
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link = link.parentNode;
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if ( !link )
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return;
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}
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if ( !link.href ) return;
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// links with targets are considered to be external links pointing outside of this wiki
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if ( link.target ) {
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// if this is a read-only editor, bail and let the browser handle the link normally
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if ( !this.edit_enabled ) return;
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// otherwise, this is a read-write editor, so we've got to launch the external link ourselves.
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// note that this ignores what the link target actually contains and assumes it's "_new"
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window.open( link.href );
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event.stop();
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return;
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}
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// special case for links to uploaded files
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if ( !link.target && /\/files\//.test( link.href ) ) {
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location.href = link.href;
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return;
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}
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event.stop();
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// load the note corresponding to the clicked link
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var query = parse_query( link );
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var title = link_title( link, query );
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var id = query.note_id;
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signal( this, "load_editor", title, id, null, link, this.iframe );
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}
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Editor.prototype.scrape_title = function () {
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// scrape the note title out of the editor
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var heading = getFirstElementByTagAndClassName( "h3", null, this.document );
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if ( heading )
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var title = scrapeText( heading );
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else
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var title = "";
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// issue a signal that the title has changed and save off the new title
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if ( this.edit_enabled )
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signal( this, "title_changed", this, this.title, title );
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this.title = title;
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}
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Editor.prototype.focused = function () {
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signal( this, "focused", this );
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}
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Editor.prototype.blurred = function () {
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this.scrape_title();
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}
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Editor.prototype.empty = function () {
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if ( !this.document || !this.document.body )
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return true; // consider it empty as of now
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return ( scrapeText( this.document.body ).length == 0 );
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}
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Editor.prototype.insert_link = function ( url ) {
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// get the current selection, which is the link title
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if ( this.iframe.contentWindow && this.iframe.contentWindow.getSelection ) { // browsers such as Firefox
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var selection = this.iframe.contentWindow.getSelection();
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// if no text is selected, then insert a link with a placeholder span as the link title, and
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// then immediately remove the link title once the link is created
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if ( selection.toString().length == 0 ) {
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this.insert_html( '<span id="placeholder_title"> </span>' );
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var placeholder = withDocument( this.document, function () { return getElement( "placeholder_title" ); } );
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selection.selectAllChildren( placeholder );
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this.exec_command( "createLink", url );
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selection.collapseToEnd();
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// hack to prevent Firefox from erasing spaces before links that happen to be at the end of list items
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var sentinel = createDOM( "span" );
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var link = placeholder.parentNode;
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insertSiblingNodesBefore( link, sentinel );
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this.link_started = placeholder.parentNode;
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// nuke the link title and collapse the selection, yielding a tasty new link that's titleless
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// (except for this span) and unselected
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link.innerHTML = "<span></span>";
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// otherwise, just create a link with the selected text as the link title
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} else {
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this.link_started = null;
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this.exec_command( "createLink", url );
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return this.find_link_at_cursor();
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}
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} else if ( this.document.selection ) { // browsers such as IE
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var range = this.document.selection.createRange();
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// if no text is selected, then insert a link with a placeholder space as the link title, and
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// then select it
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if ( range.text.length == 0 ) {
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range.text = " ";
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range.moveStart( "character", -1 );
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range.select();
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this.exec_command( "createLink", url );
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this.link_started = this.find_link_at_cursor();
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} else {
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this.link_started = null;
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this.exec_command( "createLink", url );
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return this.find_link_at_cursor();
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}
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}
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}
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Editor.prototype.start_link = function () {
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return this.insert_link( "/notebooks/" + this.notebook_id + "?note_id=new" );
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}
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|
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Editor.prototype.start_file_link = function () {
|
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return this.insert_link( "/files/new" );
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}
|
|
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Editor.prototype.end_link = function () {
|
|
this.link_started = null;
|
|
var link = this.find_link_at_cursor();
|
|
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if ( this.iframe.contentWindow && this.iframe.contentWindow.getSelection ) { // browsers such as Firefox
|
|
this.exec_command( "unlink" );
|
|
} 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" );
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span.innerHTML = " ";
|
|
range.parentElement().appendChild( span );
|
|
range.moveToElementText( span );
|
|
range.select();
|
|
range.pasteHTML( "" );
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|
}
|
|
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return link;
|
|
}
|
|
|
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Editor.prototype.find_link_at_cursor = function () {
|
|
if ( this.iframe.contentWindow && this.iframe.contentWindow.getSelection ) { // browsers such as Firefox
|
|
var selection = this.iframe.contentWindow.getSelection();
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|
var link = selection.anchorNode;
|
|
|
|
while ( link.nodeName != "A" ) {
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|
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.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 () {
|
|
if ( /Opera/.test( navigator.userAgent ) )
|
|
this.iframe.focus();
|
|
else
|
|
this.iframe.contentWindow.focus();
|
|
}
|
|
|
|
Editor.prototype.contents = function () {
|
|
return this.document.body.innerHTML;
|
|
}
|
|
|
|
// 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 ) {
|
|
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;
|
|
}
|
|
|
|
// 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 )
|
|
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();
|
|
var range = selection.getRangeAt( 0 );
|
|
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 == "strong" ) name = "b";
|
|
if ( name == "em" ) name = "i";
|
|
|
|
if ( name != "a" || node.href )
|
|
node_names.push( name );
|
|
|
|
node = node.parentNode;
|
|
}
|
|
|
|
return node_names;
|
|
}
|
|
|
|
Editor.prototype.shutdown = function( event ) {
|
|
signal( this, "title_changed", this, this.title, null );
|
|
this.closed = true;
|
|
var iframe = this.iframe;
|
|
var note_controls = this.note_controls;
|
|
disconnectAll( this );
|
|
disconnectAll( this.delete_button );
|
|
disconnectAll( this.changes_button );
|
|
disconnectAll( this.options_button );
|
|
disconnectAll( this.hide_button );
|
|
disconnectAll( iframe );
|
|
|
|
if ( this.document ) {
|
|
disconnectAll( this.document.body );
|
|
disconnectAll( this.document );
|
|
}
|
|
|
|
blindUp( iframe, options = { "duration": 0.5, afterFinish: function () {
|
|
try {
|
|
removeElement( note_controls );
|
|
removeElement( iframe );
|
|
} catch ( e ) { }
|
|
} } );
|
|
}
|
|
|
|
Editor.prototype.summarize = function () {
|
|
var summary = strip( scrapeText( this.document.body ) );
|
|
|
|
// remove the title from the scraped summary text
|
|
if ( summary.indexOf( this.title ) == 0 )
|
|
summary = summary.substr( this.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;
|
|
}
|
|
|
|
// 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;
|
|
}
|