--- /dev/null
+// Displays the page magnifier
+function webdeveloper_displayPageMagnifier(element)
+{
+ var canvas = document.getElementById("webdeveloper-page-magnifier");
+
+ // If the canvas is not set or has no context
+ if(!canvas || !canvas.getContext)
+ {
+ window.openDialog("chrome://webdeveloper/content/message/message.xul", "webdeveloper-message-dialog", "centerscreen,chrome,modal", document.getElementById("webdeveloper-string-bundle").getString("webdeveloper_firefox15Required"));
+ }
+ else
+ {
+ var checked = false;
+ var container = document.getElementById("webdeveloper-page-magnifier-container");
+
+ // If the element is set
+ if(element)
+ {
+ checked = element.getAttribute("checked");
+ }
+
+ webdeveloper_configureElement(document.getElementById("webdeveloper-page-magnifier-toolbar"), "hidden", !checked);
+
+ // If displaying page validation
+ if(checked)
+ {
+ var browserBoxObject = webdeveloper_getSelectedBrowser().boxObject;
+
+ document.getElementById("webdeveloper.magnification.level").value = webdeveloper_getStringPreference("webdeveloper.magnification.level", true);
+ webdeveloper_updatePageMagnifier(0, 0);
+
+ container.addEventListener("DOMMouseScroll", webdeveloper_scrollPageMagnifier, false);
+ window.addEventListener("mousemove", webdeveloper_movePageMagnifier, false);
+
+ container.style.left = (browserBoxObject.x + 10) + "px";
+ container.style.top = (browserBoxObject.y + 10) + "px";
+ container.hidden = false;
+ }
+ else
+ {
+ // Try to remove the event listener
+ try
+ {
+ container.removeEventListener("DOMMouseScroll", webdeveloper_scrollPageMagnifier, false);
+ }
+ catch(exception)
+ {
+ // Do nothing
+ }
+
+ // Try to remove the event listener
+ try
+ {
+ window.removeEventListener("mousemove", webdeveloper_movePageMagnifier, false);
+ }
+ catch(exception)
+ {
+ // Do nothing
+ }
+
+ container.hidden = true;
+ }
+
+ webdeveloper_toggleAppliedStyle(element, "webdeveloper-display-page-magnifier");
+ }
+}
+
+// Called when the page magnifier is moved
+function webdeveloper_movePageMagnifier(event)
+{
+ var canvas = document.getElementById("webdeveloper-page-magnifier");
+ var eventTarget = event.target;
+
+ // If the canvas and event target are set and the canvas is the event target
+ if(canvas && eventTarget && canvas == eventTarget)
+ {
+ var container = document.getElementById("webdeveloper-page-magnifier-container");
+
+ // If the container is set
+ if(container)
+ {
+ var browserBoxObject = webdeveloper_getSelectedBrowser().boxObject;
+ var browserXPosition = browserBoxObject.x;
+ var browserYPosition = browserBoxObject.y;
+ var canvasHalfHeight = canvas.height / 2;
+ var canvasHalfWidth = canvas.width / 2;
+ var containerXPosition = event.clientX - canvasHalfWidth;
+ var containerYPosition = event.clientY - canvasHalfHeight;
+ var documentElement = webdeveloper_getContentDocument().documentElement;
+ var magnificationLevel = parseFloat(webdeveloper_getStringPreference("webdeveloper.magnification.level", true));
+ var magnifierXPosition = event.clientX - browserXPosition - (canvasHalfWidth / magnificationLevel) + documentElement.scrollLeft;
+ var magnifierYPosition = event.clientY - browserYPosition - (canvasHalfHeight / magnificationLevel) + documentElement.scrollTop;
+
+ // If the container X position is less than the browser X position
+ if(containerXPosition < browserXPosition)
+ {
+ containerXPosition = browserXPosition;
+ }
+
+ // If the container Y position is less than the browser Y position
+ if(containerYPosition < browserYPosition)
+ {
+ containerYPosition = browserYPosition;
+ }
+
+ // If the magnifier X position is less than 0
+ if(magnifierXPosition < 0)
+ {
+ magnifierXPosition = 0;
+ }
+
+ // If the magnifier Y position is less than 0
+ if(magnifierYPosition < 0)
+ {
+ magnifierYPosition = 0;
+ }
+
+ container.style.left = containerXPosition + "px";
+ container.style.top = containerYPosition + "px";
+
+ webdeveloper_updatePageMagnifier(magnifierXPosition, magnifierYPosition);
+ }
+ }
+}
+
+// Called when the page magnifier is scrolled with the mouse wheel
+function webdeveloper_scrollPageMagnifier(event)
+{
+ var eventDetail = event.detail;
+
+ // If the event detail is set
+ if(eventDetail)
+ {
+ var magnificationLevel = parseFloat(webdeveloper_getStringPreference("webdeveloper.magnification.level", true));
+
+ // If the event detail is greater than zero (scroll down)
+ if(eventDetail > 0)
+ {
+ // If the magnification level is greater than one
+ if(magnificationLevel > 1)
+ {
+ magnificationLevel -= 1;
+ }
+ }
+ else
+ {
+ magnificationLevel += 1;
+ }
+
+ document.getElementById("webdeveloper.magnification.level").value = magnificationLevel;
+
+ webdeveloper_setStringPreference("webdeveloper.magnification.level", magnificationLevel);
+ webdeveloper_updatePageMagnifier(0, 0);
+
+ event.preventDefault();
+ }
+}
+
+// Updates the magnification level
+function webdeveloper_updateMagnificationLevel(element)
+{
+ var magnificationLevel = element.value;
+ var stringBundle = document.getElementById("webdeveloper-string-bundle");
+
+ // If the magnification level is empty or not a number or less than zero
+ if(!magnificationLevel || parseFloat(magnificationLevel) != magnificationLevel || magnificationLevel <= 0)
+ {
+ webdeveloper_error(stringBundle.getString("webdeveloper_invalidWidth"));
+ }
+ else
+ {
+ webdeveloper_setStringPreference("webdeveloper.magnification.level", magnificationLevel);
+ webdeveloper_updatePageMagnifier(0, 0);
+ }
+}
+
+// Updates the page magnifier
+function webdeveloper_updatePageMagnifier(xPosition, yPosition)
+{
+ var canvas = document.getElementById("webdeveloper-page-magnifier");
+
+ // If the canvas was found
+ if(canvas)
+ {
+ var context = canvas.getContext("2d");
+ var height = canvas.height;
+ var magnificationLevel = parseFloat(webdeveloper_getStringPreference("webdeveloper.magnification.level", true));
+ var width = canvas.width;
+
+ context.save();
+ context.scale(magnificationLevel, magnificationLevel);
+ context.drawWindow(webdeveloper_getContentWindow(), xPosition, yPosition, (xPosition + width) / magnificationLevel, (yPosition + height) / magnificationLevel, "rgb(255, 255, 255)");
+ context.restore();
+ }
+}
\ No newline at end of file
projects / pompage.git / blobdiff