yetangitu/canvas-based-HTML5-Comic-Book-Reader
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a little more jslint

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This commit is contained in:
Bala Clark 2010-07-09 16:36:27 +01:00
parent 8f859a3f80
commit 625528ad63
1 changed files with 13 additions and 13 deletions
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26
scripts.js
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@ -100,7 +100,7 @@ function ComicBook(id, srcs, opts) {
context = canvas.getContext("2d"); context = canvas.getContext("2d");
// preload images if needed // preload images if needed
if (pages.length != this.srcs.length) { this.preload(this.srcs); } if (pages.length !== this.srcs.length) { this.preload(this.srcs); }
else { this.drawPage(); } else { this.drawPage(); }
// add page controls // add page controls
@ -115,7 +115,7 @@ function ComicBook(id, srcs, opts) {
ComicBook.prototype.zoom = function (new_scale) { ComicBook.prototype.zoom = function (new_scale) {
options.zoomMode = "manual"; options.zoomMode = "manual";
scale = new_scale; scale = new_scale;
if (typeof pages[pointer] == "object") { this.drawPage(); } if (typeof pages[pointer] === "object") { this.drawPage(); }
}; };
/** /**
@ -136,7 +136,7 @@ function ComicBook(id, srcs, opts) {
page.onload = function () { page.onload = function () {
pages[i] = this; loaded++; pages[i] = this; loaded++;
if (loaded == buffer) { ComicBook.prototype.drawPage(); } if (loaded === buffer) { ComicBook.prototype.drawPage(); }
}; };
}); });
}; };
@ -155,14 +155,14 @@ function ComicBook(id, srcs, opts) {
var page = pages[pointer]; var page = pages[pointer];
var page2 = pages[pointer + 1]; var page2 = pages[pointer + 1];
if (typeof page != "object") { throw "invalid page type '"+ typeof page +"'"; } if (typeof page !== "object") { throw "invalid page type '"+ typeof page +"'"; }
var width = page.width; var width = page.width;
if (options.displayMode == "double") { if (options.displayMode === "double") {
// for double page spreads, factor in the width of both pages // for double page spreads, factor in the width of both pages
if (typeof page2 == "object") { width += page2.width; } if (typeof page2 === "object") { width += page2.width; }
// if this is the last page and there is no page2, still keep the canvas wide // if this is the last page and there is no page2, still keep the canvas wide
else { width += width; } else { width += width; }
@ -172,7 +172,7 @@ function ComicBook(id, srcs, opts) {
switch(options.zoomMode) { switch(options.zoomMode) {
case "manual": case "manual":
zoom_scale = (options.displayMode == "double") ? scale * 2 : scale; zoom_scale = (options.displayMode === "double") ? scale * 2 : scale;
break; break;
case "fitWidth": case "fitWidth":
@ -186,8 +186,8 @@ function ComicBook(id, srcs, opts) {
var canvas_width = page.width * zoom_scale; var canvas_width = page.width * zoom_scale;
var canvas_height = page.height * zoom_scale; var canvas_height = page.height * zoom_scale;
var page_width = (options.zoomMode == "manual") ? page.width * scale : canvas_width; var page_width = (options.zoomMode === "manual") ? page.width * scale : canvas_width;
var page_height = (options.zoomMode == "manual") ? page.height * scale : canvas_height; var page_height = (options.zoomMode === "manual") ? page.height * scale : canvas_height;
canvas_height = page_height; canvas_height = page_height;
@ -196,19 +196,19 @@ function ComicBook(id, srcs, opts) {
canvas.height = (canvas_height < window.innerHeight) ? window.innerHeight : canvas_height; canvas.height = (canvas_height < window.innerHeight) ? window.innerHeight : canvas_height;
// work out a horizonal position that will keep the pages always centred // work out a horizonal position that will keep the pages always centred
if (canvas_width < window.innerWidth && options.zoomMode == "manual") { if (canvas_width < window.innerWidth && options.zoomMode === "manual") {
offsetW = (window.innerWidth - page_width) / 2; offsetW = (window.innerWidth - page_width) / 2;
if (options.displayMode == "double") { offsetW = offsetW - page_width / 2; } if (options.displayMode === "double") { offsetW = offsetW - page_width / 2; }
} }
// work out a vertical position that will keep the pages always centred // work out a vertical position that will keep the pages always centred
if (canvas_height < window.innerHeight && options.zoomMode == "manual") { if (canvas_height < window.innerHeight && options.zoomMode === "manual") {
offsetH = (window.innerHeight - page_height) / 2; offsetH = (window.innerHeight - page_height) / 2;
} }
// draw the page(s) // draw the page(s)
context.drawImage(page, offsetW, offsetH, page_width, page_height); context.drawImage(page, offsetW, offsetH, page_width, page_height);
if (options.displayMode == "double" && typeof page2 == "object") { context.drawImage(page2, page_width + offsetW, offsetH, page_width, page_height); } if (options.displayMode === "double" && typeof page2 === "object") { context.drawImage(page2, page_width + offsetW, offsetH, page_width, page_height); }
}; };