blinker / firefox.plugin / data / scripts / gazePosition.js @ 76dd22bd
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/*
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* Copyright 2015 Thies Pfeiffer and Dimitri Heil and Kevin Taron
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* Blinker is distributed under the terms of the GNU General Public License
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*
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* This file is part of Blinker.
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*
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* Blinker is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Blinker is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Blinker. If not, see <http://www.gnu.org/licenses/>.
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*/
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var gazeScrollAtBorders;
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/*
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* Check for elements at position x,y that have gazeEvents bound to them and trigger those events
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*/
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function gazePosition(x, y) { |
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//console.log("functions.js :: "+"gazePosition()" +", x: " + x +", y: "+y );
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//save current position into gazeInformation Object
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gazeInformation.x = x; |
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gazeInformation.y = y; |
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//check if gestureMode has been initiated and needs to be shown
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if (gestureMode) {
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if (gestureString.length == 4) { |
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$.notify("GestureString: " + gestureString, "success"); |
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gestureMode = false;
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edgeFunctions.clearDivs(); |
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var myGestures = blickBrowserSettings.gestures.split(";"); |
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if (myGestures.length > 0) { |
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for (var gg = 0; gg < myGestures.length; gg++) { |
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var splittedGesture = myGestures[gg].split("|"); |
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console.log(splittedGesture[1]);
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if (splittedGesture[0] == gestureString) { |
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console.log("Calling Function: window."+splittedGesture[1]); |
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window[splittedGesture[1]]();
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} |
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} |
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} |
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} |
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if (Date.now() - gestureTimer >= 5000) { |
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$.notify("gestureTimer ran out.", "success"); |
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gestureMode = false;
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edgeFunctions.clearDivs(); |
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} |
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} |
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//check if autoReadingMode is enabled and run the routine if needed
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if (blickBrowserSettings.autoReadingMode){
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clearTimeout(checkForLinksInterval); |
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if (Math.abs(gazeInformation.gazeMoveStartPoint.x - gazeInformation.x) > blickBrowserSettings.autoReadingModeDistance ||
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Math.abs(gazeInformation.gazeMoveStartPoint.y - gazeInformation.y) > blickBrowserSettings.autoReadingModeDistance){
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gazeInformation.gazeMoveStartTime = Date.now(); |
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gazeInformation.gazeMoveStartPoint = {"x": gazeInformation.x,"y":gazeInformation.y};
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} |
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if (Date.now() - gazeInformation.gazeMoveStartTime >= blickBrowserSettings.autoReadingModeThreshold){
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gazeInformation.gazeMoveStartTime = Date.now(); |
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gazeInformation.gazeMoveStartPoint = {"x": gazeInformation.x,"y":gazeInformation.y};
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gazeFunctions.checkForLinks(); |
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} |
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} |
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// Compute gaze Correction
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if (gazeCorrectionMode === true) { |
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var gazeValues = {
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timestamp: Date.now(),
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gcPoint: gazeCorrectionPointNr,
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x: gazeInformation.x,
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y: gazeInformation.y
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}; |
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gazeCorrectionData.push(gazeValues); |
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} |
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//scroll if scrolling is enabled
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if (gazeScrollAtBorders === true) { |
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if (gazeInformation.y > (window.innerHeight + window.scrollY) - (window.innerHeight * (blickBrowserSettings.scrollThreshold/100) )) { |
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window.scroll(window.scrollX, window.scrollY + blickBrowserSettings.scrollSpeed); |
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} else if ((gazeInformation.y - window.scrollY) < (window.innerHeight * (blickBrowserSettings.scrollThreshold/100))) { |
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window.scroll(window.scrollX, window.scrollY - blickBrowserSettings.scrollSpeed); |
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} |
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if ((gazeInformation.x - window.scrollX) < (window.innerWidth * (blickBrowserSettings.scrollThreshold/100))) { |
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window.scroll(window.scrollX - blickBrowserSettings.scrollSpeed, window.scrollY); |
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} else if (gazeInformation.x > (window.innerWidth + window.scrollX) - (window.innerWidth * (blickBrowserSettings.scrollThreshold/100))) { |
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window.scroll(window.scrollX + blickBrowserSettings.scrollSpeed, window.scrollY); |
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} |
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} |
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//position and show crosshair if enabled
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if (blickBrowserSettings.gazeCrosshair === true) { |
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$("#crosshairTop").css("left", (gazeInformation.x) + "px"); |
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$("#crosshairTop").css("top", (gazeInformation.y - 16) + "px"); |
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$("#crosshairBottom").css("left", (gazeInformation.x) + "px"); |
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$("#crosshairBottom").css("top", (gazeInformation.y + 1) + "px"); |
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$("#crosshairLeft").css("left", (gazeInformation.x - 16) + "px"); |
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$("#crosshairLeft").css("top", (gazeInformation.y) + "px"); |
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$("#crosshairRight").css("left", (gazeInformation.x + 1) + "px"); |
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$("#crosshairRight").css("top", (gazeInformation.y) + "px"); |
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$("#crosshairTop").css("display", "block"); |
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$("#crosshairBottom").css("display", "block"); |
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$("#crosshairLeft").css("display", "block"); |
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$("#crosshairRight").css("display", "block"); |
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//$("#cross").css("display", "block");
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} else {
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$("#crosshairTop").css("display", "none"); |
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$("#crosshairBottom").css("display", "none"); |
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$("#crosshairLeft").css("display", "none"); |
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$("#crosshairRight").css("display", "none"); |
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//$("#cross").css("display", "none");
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} |
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//move findLinkArea with gazePosition
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$("#findLinkArea").css("display", "none"); |
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$("#findLinkArea").css("left", (gazeInformation.x - $(findLinkArea).width() / 2) + "px"); |
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$("#findLinkArea").css("top", (gazeInformation.y - $(findLinkArea).height() / 2) + "px"); |
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/*
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* Check current gazePosition for edgeGazeGestures
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*/
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if ( (x < ((-1 * blickBrowserSettings.leftEdgeTolerance) + window.scrollX) ) && (y > ( (window.innerHeight*0.1) + window.scrollY ) ) && (y < ((window.innerHeight*0.9)) + window.scrollY) ) { |
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//console.log("leftEdge!!!"+blickBrowserSettings['leftEdge']);
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edgeFunctions[blickBrowserSettings.leftEdge](); |
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} |
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if ( (y < ((-1 * blickBrowserSettings.topEdgeTolerance) + window.scrollY) ) && (x > ((window.innerWidth*0.1) + window.scrollX ) && (x < ((window.innerWidth*0.9)+ window.scrollX ) ) ) ) { |
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//console.log("topEdge!!!");
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edgeFunctions[blickBrowserSettings.topEdge](); |
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} |
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if ((x > (window.innerWidth + window.scrollX + blickBrowserSettings.rightEdgeTolerance)) && (y > ( (window.innerHeight*0.1) + window.scrollY ) ) && (y < ((window.innerHeight*0.9)) + window.scrollY) ) { |
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//console.log("rightEdge!!!");
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edgeFunctions[blickBrowserSettings.rightEdge](); |
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} |
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//check if privacy mode is enabled and move the holeImage according to gazeposition
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if (blickBrowserSettings.privacyMode === true) { |
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//console.log("privacy mode is true!!!!!");
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$("#holeImage").css("display", "block"); |
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$("#holeImage").css('background-position', (gazeInformation.x - window.scrollX - 2500) + 'px ' + (gazeInformation.y - window.scrollY - 2500) + 'px'); |
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} else {
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$("#holeImage").css("display", "none"); |
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} |
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//Get elementAt gazePosition
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var elementBelow = document.elementFromPoint(gazeInformation.x - scrollX, gazeInformation.y - scrollY);
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// React on GAZE Interactions
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if($(elementBelow).data('gaze')) { |
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enterLeaveOver(elementBelow); |
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initGazeType(elementBelow); |
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} |
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//document.getElementById("offsetLabel").innerHTML = "Offset: " + "x: " + (browserDecorationThickness + window.scrollX + window.screenX) + "px" + "|y: " + (browserTopBarsHeight + window.scrollY + window.screenY) + "px";
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//append debug information to mouse if enabled
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if (blickBrowserSettings.debugInformation === true) { |
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$("#status").css("display", "block"); |
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} else {
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$("#status").css("display", "none"); |
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} |
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document.getElementById("status").innerHTML = "X: " + gazeInformation.x + "<br /> Y: " + gazeInformation.y + "<br /> fix: " + gazeInformation.isFixation + "<br /> dur:" + (Date.now() - gazeInformation.currentElementFixatedAt) + "ms" + "<br /> winsize:" + window.innerWidth + "px x " + innerHeight + "px" + "<br /> xOffset:" + (window.mozInnerScreenX + window.scrollX) + "px" + "<br /> yOffset:" + (window.mozInnerScreenY + window.scrollY) + "px"; |
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if (elementBelow !== null) { |
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document.getElementById("status").innerHTML += ("<br />type:" + elementBelow.tagName); |
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} |
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//Fixated DISPATCHER
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if (elementBelow !== null && false) { |
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var dataGazeObject = $(elementBelow).data('gaze'); |
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if (dataGazeObject !== undefined) { |
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//does element below have an 'isFixated' event?
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if ($(dataGazeObject)[0].hasOwnProperty("isFixated")) { |
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//if user looks at that element more than 10% of fixationThreshold-time, then show the progressCircle
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if ((Date.now() - gazeInformation.currentElementFixatedAt) >= blickBrowserSettings.fixationThreshold * 0.1) { |
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$('.dial').val(Date.now() - gazeInformation.currentElementFixatedAt).trigger('change'); |
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$("#gazeProgress").css("display", "block"); |
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if (distanceToGaze($("#gazeProgress")) < 10) { |
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$("#gazeProgress").css("left", ($("#gazeProgress").offset().left + 10)); |
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} |
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} |
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//if user looks at that element longer that fixationThreshold-time, trigger isFixated event of that element
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if ((Date.now() - gazeInformation.currentElementFixatedAt) >= blickBrowserSettings.fixationThreshold) {
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console.log("fixationTime: "+(Date.now() - gazeInformation.currentElementFixatedAt));
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gazeInformation.currentElementFixatedAt = Date.now(); |
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gazeInformation.fixatedElement = elementBelow; |
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gazeInformation.fixatedElement.dispatchEvent(isFixated); |
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} |
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} else {
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gazeInformation.currentElementFixatedAt = Date.now(); |
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$("#gazeProgress").css("display", "none"); |
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} |
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} else {
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gazeInformation.currentElementFixatedAt = Date.now(); |
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$("#gazeProgress").css("display", "none"); |
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} |
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} |
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//GAZE ENTER, GAZE LEAVE AND GAZE OVER DISPATCHER
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if (elementBelow !== null && false) { |
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//if current element has the gazeOver event bould to it, trigger it
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var dataGazeObject = $(elementBelow).data('gaze'); |
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if (dataGazeObject !== undefined) { |
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if ($(dataGazeObject)[0].hasOwnProperty("gazeOver")) { |
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$(gazeInformation.elementBelow).trigger("gazeOver"); |
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} |
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} |
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//if its a new element below gaze position
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if (gazeInformation.lastElementBelow != elementBelow) {
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//if it's a new element - reset the fixated-timer
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gazeInformation.currentElementFixatedAt = Date.now(); |
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$('#gazeProgress').css("left", ($(elementBelow).offset().left + $(elementBelow).width() + 10)); |
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$('#gazeProgress').css("top", ($(elementBelow).offset().top)); |
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gazeInformation.fixationPositionAtStart = {
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"x": gazeInformation.x,
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"y": gazeInformation.y
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}; |
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//if (gazeInformation.lastElementBelow != gazeInformation.elementBelow){
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//if last element has gazeLeave event bound to it, trigger it
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var dataGazeObject = $(gazeInformation.lastElementBelow).data('gaze'); |
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if (dataGazeObject !== undefined) { |
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if ($(dataGazeObject)[0].hasOwnProperty("gazeLeave")) { |
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$(gazeInformation.lastElementBelow).trigger("gazeLeave"); |
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} |
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} |
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//$(gazeInformation.lastElementBelow).trigger("gazeLeave");
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//}
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//save the element in the JSON object
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gazeInformation.lastElementBelow = gazeInformation.elementBelow; |
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//if the element was not null - dispatch event
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if (gazeInformation.lastElementBelow !== null) { |
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//unfade last gazed element
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var dataGazeObject = $(gazeInformation.lastElementBelow).data('gaze'); |
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if (dataGazeObject !== undefined) { |
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$(gazeInformation.lastElementBelow).stop();
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$(gazeInformation.lastElementBelow).fadeTo("fast", 1); |
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} |
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gazeInformation.currentElementFixatedAt = Date.now(); |
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gazeLeaveFunc(gazeInformation.lastElementBelow); |
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} |
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//save current element to gazeInformation
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gazeInformation.elementBelow = elementBelow; |
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//if last element has gazeEnter event bound to it, trigger it
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var dataGazeObject = $(elementBelow).data('gaze'); |
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if (dataGazeObject !== undefined) { |
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if ($(dataGazeObject)[0].hasOwnProperty("gazeEnter")) { |
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$(gazeInformation.elementBelow).trigger("gazeEnter"); |
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gazeInformation.currentElementFixatedAt = Date.now(); |
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} |
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} |
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//if explicitMode is enabled, put the currently gazed elements name and url into the gazeLinks Array
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if (blickBrowserSettings.explicitMode === true) { |
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if (!wheelSelectorShowing) {
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if (!controlBarShowing) {
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if (blickBrowserSettings.blickBrowserMode != 'reading') { |
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if ($(gazeInformation.elementBelow).attr('href') !== undefined) { |
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gazeInformation.gazeLinks = []; |
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//console.log("NumOfGazeLinks: " + gazeInformation.gazeLinks.length);
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if (gazeInformation.gazeLinks.length < 1) { |
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gazeInformation.gazeLinks.push({
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"object": $(gazeInformation.elementBelow), |
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"index": 0, |
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"name": $(gazeInformation.elementBelow).text(), |
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"url": $(gazeInformation.elementBelow).attr('href') |
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}); |
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appendGazeLinks(); |
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} |
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} |
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} |
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} |
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} |
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} |
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gazeInformation.currentElementFixatedAt = Date.now(); |
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gazeEnterFunc(gazeInformation.elementBelow); |
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//fade gazed elements
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var dataGazeObject = $(gazeInformation.elementBelow).data('gaze'); |
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if (dataGazeObject !== undefined) { |
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$(gazeInformation.elementBelow).stop();
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$(gazeInformation.elementBelow).fadeTo('fast', 0.3); |
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} |
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} |
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} |
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} |
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/*
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* gazePosition adjusting before working with the gazePosition
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*/
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function calcGazePosition(message) { |
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//console.log(window.mozInnerScreenY);
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//console.log("functions.js :: "+"calcGazePosition()" +", message: "+message );
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//stop asyncronous checking for links if readingMode is active
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if (blickBrowserSettings.blickBrowserMode == "reading") { |
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clearTimeout(checkForLinksInterval); |
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} |
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eyeTrackingData = JSON.parse(message); |
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var newX, newY;
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raw = eyeTrackingData; |
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if (raw.x == "0.0" && raw.y == "0.0") { |
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self.port.emit("setIconRed", "noop"); |
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} else {
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self.port.emit("setIconGreen", "noop"); |
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} |
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//remove current screen position from gazePosition
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//add the current scrolling position from gazePosition
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//add the manual offset to the gazePosition
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raw.x = (raw.x / blickBrowserSettings.scaling) + window.scrollX - window.mozInnerScreenX + blickBrowserSettings.gazeOffsetX; |
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raw.y = (raw.y / blickBrowserSettings.scaling) + window.scrollY - window.mozInnerScreenY + blickBrowserSettings.gazeOffsetY; |
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//safe previous
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gazeInformation.previousX = gazeInformation.x; |
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gazeInformation.previousY = gazeInformation.y; |
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newX = raw.x; |
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newY = raw.y; |
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//do gazeSmoothing if needed
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if (blickBrowserSettings.gazeSmoothing === true) { |
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//empty gazeHistory if gaze just performed a saccade
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//append the gazePosition to gazeHistory otherwise
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if (Math.abs(gazeInformation.previousX - newX) > blickBrowserSettings.saccadeLength) {
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gazeCollection = []; |
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} else if (Math.abs(gazeInformation.previousY - newY) > blickBrowserSettings.saccadeLength) { |
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gazeCollection = []; |
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} else {
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//if gazeHistory is not full, append current gazePosition
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if (gazeCollection.length < blickBrowserSettings.gazeSmoothingHistory) {
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gazeCollection.push({
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"x": newX,
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"y": newY
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}); |
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//otherwise remove oldest element and append newest
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} else {
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gazeCollection.splice(0, 1); |
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gazeCollection.push({
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"x": newX,
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"y": newY
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}); |
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} |
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var sumX = 0; |
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var sumY = 0; |
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//calculate the average gazePosition from all positions in gazeHistory
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for (var g = 0; g < gazeCollection.length; g++) { |
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sumX += gazeCollection[g].x; |
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sumY += gazeCollection[g].y; |
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} |
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//set newly calculated gazePosition
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newX = sumX / gazeCollection.length; |
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newY = sumY / gazeCollection.length; |
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} |
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} |
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try{
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//run check for gazeEvents and options on newly calculated gazePosition
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gazePosition(newX, newY); |
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} catch (exc){
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| 471 |
console.log("ERROR MESSAGE: "+exc.message);
|
| 472 |
console.log("ERROR NAME: "+exc.name);
|
| 473 |
console.log("ERROR LINENUMBER: "+exc.lineNumber);
|
| 474 |
console.log("ERROR LINENUMBER: "+exc.columnNumber);
|
| 475 |
} |
| 476 |
} |
| 477 |
|
| 478 |
|
| 479 |
function isFix(elementBelow) { |
| 480 |
//if user looks at that element more than 10% of fixationThreshold-time, then show the progressCircle
|
| 481 |
if ((Date.now() - gazeInformation.currentElementFixatedAt) >= blickBrowserSettings.fixationThreshold * 0.1) { |
| 482 |
|
| 483 |
// console.log("10% of fixation");
|
| 484 |
$('.dial').val(Date.now() - gazeInformation.currentElementFixatedAt).trigger('change'); |
| 485 |
$("#gazeProgress").css("display", "block"); |
| 486 |
|
| 487 |
|
| 488 |
|
| 489 |
if (distanceToGaze($("#gazeProgress")) < 10) { |
| 490 |
$("#gazeProgress").css("left", ($("#gazeProgress").offset().left + 10)); |
| 491 |
} |
| 492 |
|
| 493 |
|
| 494 |
} |
| 495 |
|
| 496 |
|
| 497 |
//if user looks at that element longer that fixationThreshold-time, trigger isFixated event of that element
|
| 498 |
if ((Date.now() - gazeInformation.currentElementFixatedAt) >= blickBrowserSettings.fixationThreshold) {
|
| 499 |
console.log("fixation");
|
| 500 |
console.log("fixationTime: "+(Date.now() - gazeInformation.currentElementFixatedAt));
|
| 501 |
gazeInformation.currentElementFixatedAt = Date.now(); |
| 502 |
gazeInformation.fixatedElement = elementBelow; |
| 503 |
gazeInformation.fixatedElement.dispatchEvent(isFixated); |
| 504 |
$('.fixatedElement').removeClass('fixatedElement'); |
| 505 |
$(gazeInformation.fixatedElement).addClass('fixatedElement'); |
| 506 |
$(gazeInformation.fixatedElement).trigger("isFixated"); |
| 507 |
} |
| 508 |
} |
| 509 |
|
| 510 |
function isOver(elementBelow) { |
| 511 |
$(gazeInformation.elementBelow).trigger("gazeOver"); |
| 512 |
isFix(elementBelow); |
| 513 |
} |
| 514 |
|
| 515 |
function isLeave() { |
| 516 |
$(gazeInformation.lastElementBelow).trigger("gazeLeave"); |
| 517 |
|
| 518 |
//if the element was not null - dispatch event
|
| 519 |
if (gazeInformation.lastElementBelow !== null) { |
| 520 |
// console.log("leave element: " + gazeInformation.lastElementBelow);
|
| 521 |
//unfade last gazed element
|
| 522 |
var dataGazeObject = $(gazeInformation.lastElementBelow).data('gaze'); |
| 523 |
if (dataGazeObject !== undefined) { |
| 524 |
$(gazeInformation.lastElementBelow).stop();
|
| 525 |
$(gazeInformation.lastElementBelow).fadeTo("fast", 1); |
| 526 |
} |
| 527 |
|
| 528 |
gazeInformation.currentElementFixatedAt = Date.now(); |
| 529 |
gazeLeaveFunc(gazeInformation.lastElementBelow); |
| 530 |
|
| 531 |
} |
| 532 |
} |
| 533 |
|
| 534 |
function isEnter(elementBelow) { |
| 535 |
if($(elementBelow).data('gaze')) { |
| 536 |
//console.log("enter element: " + gazeInformation.lastElementBelow);
|
| 537 |
gazeInformation.elementBelow = elementBelow; |
| 538 |
$(gazeInformation.elementBelow).trigger("gazeEnter"); |
| 539 |
gazeInformation.currentElementFixatedAt = Date.now(); |
| 540 |
gazeEnterFunc(gazeInformation.elementBelow); |
| 541 |
isFix(elementBelow); |
| 542 |
} |
| 543 |
} |
| 544 |
|
| 545 |
|
| 546 |
function enterLeaveOver(elementBelow) { |
| 547 |
//GAZE ENTER, GAZE LEAVE AND GAZE OVER DISPATCHER
|
| 548 |
if (elementBelow !== null) { |
| 549 |
if($(elementBelow).data('gaze') !== undefined) { |
| 550 |
//trigger is over element
|
| 551 |
isOver(elementBelow); |
| 552 |
|
| 553 |
if(gazeInformation.lastElementBelow != elementBelow) {
|
| 554 |
//if it's a new element - reset the fixated-timer
|
| 555 |
gazeInformation.currentElementFixatedAt = Date.now(); |
| 556 |
$('#gazeProgress').css("left", ($(elementBelow).offset().left + $(elementBelow).width() + 10)); |
| 557 |
$('#gazeProgress').css("top", ($(elementBelow).offset().top)); |
| 558 |
gazeInformation.fixationPositionAtStart = {
|
| 559 |
"x": gazeInformation.x,
|
| 560 |
"y": gazeInformation.y
|
| 561 |
}; |
| 562 |
|
| 563 |
isLeave(); |
| 564 |
isEnter(elementBelow); |
| 565 |
gazeInformation.lastElementBelow = gazeInformation.elementBelow; |
| 566 |
} |
| 567 |
} |
| 568 |
|
| 569 |
} else {
|
| 570 |
isLeave(); |
| 571 |
gazeInformation.lastElementBelow = null;
|
| 572 |
} |
| 573 |
} |
| 574 |
|
| 575 |
function setScrollAtBorder(onScroll = blickBrowserSettings.scrollAtBorders) { |
| 576 |
gazeScrollAtBorders = onScroll; |
| 577 |
} |