blob: 1f44f3bce31f3bf483d2b081ffe605106d4e746d [file] [log] [blame]
// Copyright (c) 2009 The Chromium Authors. All rights reserved. Use of this
// source code is governed by a BSD-style license that can be found in the
// LICENSE file.
var screenshot = {
tab: 0,
canvas: document.createElement("canvas"),
startX: 0,
startY: 0,
scrollX: 0,
scrollY: 0,
docHeight: 0,
docWidth: 0,
visibleWidth: 0,
visibleHeight: 0,
scrollXCount: 0,
scrollYCount: 0,
scrollBarX: 17,
scrollBarY: 17,
captureStatus: true,
screenshotName: null,
/**
* Receive messages from content_script, and then decide what to do next
*/
addMessageListener: function() {
chrome.extension.onMessage.addListener(function(request, sender, response) {
console.log(request);
var obj = request;
switch (obj.msg) {
case 'capture_selected':
screenshot.captureSelected();
break;
case 'capture_window':
screenshot.captureWindow();
break;
case 'capture_area':
screenshot.showSelectionArea();
break;
case 'capture_webpage':
screenshot.captureWebpage();
break;
}
});
},
/**
* Send the Message to content-script
*/
sendMessage: function(message, callback) {
chrome.tabs.getSelected(null, function(tab) {
chrome.tabs.sendMessage(tab.id, message, callback);
});
},
showSelectionArea: function() {
screenshot.sendMessage({msg: 'show_selection_area'}, null);
},
captureWindow: function() {
screenshot.sendMessage({msg: 'capture_window'},
screenshot.onResponseVisibleSize);
},
captureSelected: function() {
screenshot.sendMessage({msg: 'capture_selected'},
screenshot.onResponseVisibleSize);
},
captureWebpage: function() {
screenshot.sendMessage({msg: 'scroll_init'},
screenshot.onResponseVisibleSize);
},
onResponseVisibleSize: function(response) {
switch (response.msg) {
case 'capture_window':
screenshot.captureVisible(response.docWidth, response.docHeight);
break;
case 'scroll_init_done':
screenshot.startX = response.startX,
screenshot.startY = response.startY,
screenshot.scrollX = response.scrollX,
screenshot.scrollY = response.scrollY,
screenshot.canvas.width = response.canvasWidth;
screenshot.canvas.height = response.canvasHeight;
screenshot.visibleHeight = response.visibleHeight,
screenshot.visibleWidth = response.visibleWidth,
screenshot.scrollXCount = response.scrollXCount;
screenshot.scrollYCount = response.scrollYCount;
screenshot.docWidth = response.docWidth;
screenshot.docHeight = response.docHeight;
screenshot.zoom = response.zoom;
setTimeout("screenshot.captureAndScroll()", screenshot.captureDelayInMs());
break;
case 'scroll_next_done':
screenshot.scrollXCount = response.scrollXCount;
screenshot.scrollYCount = response.scrollYCount;
setTimeout("screenshot.captureAndScroll()", screenshot.captureDelayInMs());
break;
case 'scroll_finished':
screenshot.captureAndScrollDone();
break;
}
},
captureSpecialPage: function() {
var formatParam = localStorage.screenshootQuality || 'png';
chrome.tabs.captureVisibleTab(
null, {format: formatParam, quality: 50}, function(data) {
var image = new Image();
image.onload = function() {
screenshot.canvas.width = image.width;
screenshot.canvas.height = image.height;
var context = screenshot.canvas.getContext("2d");
context.drawImage(image, 0, 0);
screenshot.postImage();
};
image.src = data;
});
},
captureScreenCallback: function(data) {
var image = new Image();
image.onload = function() {
screenshot.canvas.width = image.width;
screenshot.canvas.height = image.height;
var context = screenshot.canvas.getContext("2d");
context.drawImage(image, 0, 0);
screenshot.postImage();
};
image.src = "data:image/bmp;base64," + data;
},
/**
* Use drawImage method to slice parts of a source image and draw them to
* the canvas
*/
capturePortion: function(x, y, width, height,
visibleWidth, visibleHeight, docWidth, docHeight) {
var formatParam = localStorage.screenshootQuality || 'png';
chrome.tabs.captureVisibleTab(
null, {format: formatParam, quality: 50}, function(data) {
var image = new Image();
image.onload = function() {
var curHeight = image.width < docWidth ?
image.height - screenshot.scrollBarY : image.height;
var curWidth = image.height < docHeight ?
image.width - screenshot.scrollBarX : image.width;
var zoomX = curWidth / visibleWidth;
var zoomY = curHeight / visibleHeight;
screenshot.canvas.width = width * zoomX;
screenshot.canvas.height = height * zoomY;
var context = screenshot.canvas.getContext("2d");
context.drawImage(image, x * zoomX, y * zoomY, width * zoomX,
height * zoomY, 0, 0, width * zoomX, height * zoomY);
screenshot.postImage();
};
image.src = data;
});
},
captureVisible: function(docWidth, docHeight) {
var formatParam = localStorage.screenshootQuality || 'png';
chrome.tabs.captureVisibleTab(
null, {format: formatParam, quality: 50}, function(data) {
var image = new Image();
image.onload = function() {
var width = image.height < docHeight ?
image.width - 17 : image.width;
var height = image.width < docWidth ?
image.height - 17 : image.height;
screenshot.canvas.width = width;
screenshot.canvas.height = height;
var context = screenshot.canvas.getContext("2d");
context.drawImage(image, 0, 0, width, height, 0, 0, width, height);
screenshot.postImage();
};
image.src = data;
});
},
/**
* Use the drawImage method to stitching images, and render to canvas
*/
captureAndScroll: function() {
var formatParam = localStorage.screenshootQuality || 'png';
chrome.tabs.captureVisibleTab(
null, {format: formatParam, quality: 50}, function(data) {
var image = new Image();
image.onload = function() {
var context = screenshot.canvas.getContext('2d');
var width = 0;
var height = 0;
// Get scroll bar's width.
screenshot.scrollBarY =
screenshot.visibleHeight < screenshot.docHeight ? 17 : 0;
screenshot.scrollBarX =
screenshot.visibleWidth < screenshot.docWidth ? 17 : 0;
// Get visible width and height of capture result.
var visibleWidth =
(image.width - screenshot.scrollBarY < screenshot.canvas.width ?
image.width - screenshot.scrollBarY : screenshot.canvas.width);
var visibleHeight =
(image.height - screenshot.scrollBarX < screenshot.canvas.height ?
image.height - screenshot.scrollBarX : screenshot.canvas.height);
// Get region capture start x coordinate.
var zoom = screenshot.zoom;
var x1 = screenshot.startX - Math.round(screenshot.scrollX * zoom);
var x2 = 0;
var y1 = screenshot.startY - Math.round(screenshot.scrollY * zoom);
var y2 = 0;
if ((screenshot.scrollYCount + 1) * visibleWidth >
screenshot.canvas.width) {
width = screenshot.canvas.width % visibleWidth;
x1 = (screenshot.scrollYCount + 1) * visibleWidth -
screenshot.canvas.width + screenshot.startX - screenshot.scrollX;
} else {
width = visibleWidth;
}
if ((screenshot.scrollXCount + 1) * visibleHeight >
screenshot.canvas.height) {
height = screenshot.canvas.height % visibleHeight;
if ((screenshot.scrollXCount + 1) * visibleHeight +
screenshot.scrollY < screenshot.docHeight) {
y1 = 0;
} else {
y1 = (screenshot.scrollXCount + 1) * visibleHeight +
screenshot.scrollY - screenshot.docHeight;
}
} else {
height = visibleHeight;
}
x2 = screenshot.scrollYCount * visibleWidth;
y2 = screenshot.scrollXCount * visibleHeight;
context.drawImage(image, x1, y1, width, height, x2, y2, width, height);
screenshot.sendMessage({msg: 'scroll_next', visibleWidth: visibleWidth,
visibleHeight: visibleHeight}, screenshot.onResponseVisibleSize);
};
image.src = data;
});
},
captureAndScrollDone: function() {
screenshot.postImage();
},
/**
* Post the image to 'showimage.html'
*/
postImage: function() {
chrome.tabs.getSelected(null, function(tab) {
screenshot.tab = tab;
});
var date = new Date();
screenshot.screenshotName = "Screenshot "+dateFormat(date, 'Y-m-d H.i.s');
chrome.tabs.create({'url': 'showimage.html'});
var popup = chrome.extension.getViews({type: 'popup'})[0];
if (popup)
popup.close();
},
isThisPlatform: function(operationSystem) {
return navigator.userAgent.toLowerCase().indexOf(operationSystem) > -1;
},
init: function() {
localStorage.screenshootQuality = localStorage.screenshootQuality || 'png';
screenshot.addMessageListener();
},
captureDelayInMs: function() {
var maxCallsPerSecond = chrome?.tabs?.MAX_CAPTURE_VISIBLE_TAB_CALLS_PER_SECOND;
if (!maxCallsPerSecond) return 100;
return Math.ceil(1000/maxCallsPerSecond) + 10;
},
};
screenshot.init();