1.算法程序
illustrator是矢量编辑软件，画板是绘制处理的重要容器，在印刷方面的一个重要功能就是打开多页PDF，开发一个打开多页PDF功能，以下功能仅用于学习交流，请勿用于非法用途，源代码如下所示：
var w = new Window("dialog { text: 'PDF 打开选项', frameLocation:[400, 200], alignChildren:['fill', 'top'], filePnl: Panel { text: 'PDF 文件', orientation:'row', alignChildren:['left', 'center'], loadBtn: Button { text:'. . .', helpTip :'浏览 PDF 文件, 或将文件路径粘帖至右边文本框'}, et: EditText { text:'' , preferredSize: [220, 20]}, }, rangePnl: Panel { text: '页面', orientation:'column', alignChildren:['fill', 'top'], range: Group {allRb: RadioButton { text:'全部页面', value:true, helpTip: '部分 PDF 文件可能无法正确获取页数\n遇此请自行输入“ 1-总页数”'}, rangeRb: RadioButton { text:'范围:', helpTip: '正确: 1-5 或 1, 2, 3 或 1, 2-4, 5, 7-8\n允许空格, 逗号须为半角'} et: EditText { text: '', characters:25, properties:{multiline:true} }}, caGrp: Group{artboardsCb: Checkbox { text:'创建画板', preferredSize: [84, 20], helpTip: '仅适用于CS4/CS5'}, st: StaticText { text: '间距:' }, et: EditText { text:'20', characters:3}, st2: StaticText { text:'pt' }}, }, dividerLine: Panel { preferredSize: [280, 1], margins:0, }, btn: Group { orientation:'row', alignChildren:['right', 'center'], cancelBtn: Button { text:'取消', properties:{name:'cancel'}}, buildBtn: Button { text:'打开', properties:{name:'ok'} }}}");
w.rangePnl.caGrp.artboardsCb.enabled = w.rangePnl.caGrp.artboardsCb.value = app.version.split(".")[0] > 13;
w.filePnl.loadBtn.onClick = function() {
var pdfile = File.openDialog("选择PDF文件", "*.pdf");
pdfile && w.filePnl.et.text = pdfile.fsName;
};
w.rangePnl.range.et.onChange = function() {
this.parent.rangeRb.value = true;
};
w.btn.buildBtn.onClick = function go() {
var start = new Date().getTime();
var pdfile = w.filePnl.et.text;
var allPage = w.rangePnl.range.allRb.value;
var pageRange = w.rangePnl.range.et.text;
var createAbs = w.rangePnl.caGrp.artboardsCb.value;
var gap = w.rangePnl.caGrp.et.text;
var psArr = [];
var maxArr = null;
var pageArr = null;
var pdfOptions = app.preferences.PDFFileOptions;
var oldInteractionPref = app.userInteractionLevel;
w.close(0);
app.userInteractionLevel = UserInteractionLevel.DONTDISPLAYALERTS;
pdfOptions.pageToOpen = 1;
app.open(new File(pdfile));
width = activeDocument.width;
height = activeDocument.height;
activeDocument.close(SaveOptions.DONOTSAVECHANGES);
if (allPage) {
pageCount = getPDFPageCount(new File(pdfile));
if (!pageCount) {
return;
}
mainloop(pageCount, 0, pageCount);
} else {
maxArr = function() {
for (var i = 0,
var a = []; ++i < 101; a.push(i)) {
}
return a;
}();
pageArr = pageRange.replace(/s/g, "").replace(/(d+)-(d+)/g, function($1, $2, $3) {
return maxArr.slice($2 - 1, $3);
}).split(",");
mainloop(pageArr.length - 1, -1, pageArr.length);
}
if (createAbs) {
var layers = activeDocument.layers;
layers[layers.length - 1].remove();
psArr = psArr.reverse();
for (var k = layers.length - 1; k >= 0; k--) {
if (layers[k].groupItems.length > 0) {
layers[k].visible = true;
var myGroup = layers[k].groupItems[0];
myGroup.top = (activeDocument.artboards[k].artboardRect[1] + psArr[k][0]) - height;
myGroup.left = activeDocument.artboards[k].artboardRect[0] + psArr[k][1];
layers[k].visible = false;
}
}
}
finish = new Date().getTime();
totalSeconds = (finish - start) / 1000;
minutes = Math.floor(totalSeconds / 60);
seconds = totalSeconds % 60;
alert("操作已完成，图层为隐藏状态，按住Alt单击眼睛图标以显示n打开 " + activeDocument.layers.length + " 页, 用时 " + minutes + " 分, " + Math.round(seconds) + " 秒.");
app.userInteractionLevel = oldInteractionPref;
function mainloop(start, end, pages) {
if (createAbs) {
targetDoc = app.documents.add(DocumentColorSpace.CMYK, width, height, pages, DocumentArtboardLayout.GridByRow, gap, Math.round(Math.sqrt(pages)))
} else {
targetDoc = app.documents.add(DocumentColorSpace.CMYK, width, height)
}
for (var i = start; i > end; i--) {
p = pageArr ? pageArr[i] : i;
pdfOptions.pageToOpen = p;
sourceDoc = app.open(new File(pdfile));
targetLayer = targetDoc.layers.add();
targetLayer.name = "Page " + p;
main(sourceDoc, targetLayer, psArr);
}
}
};
w.btn.cancelBtn.onClick = function() {
w.close(0);
};
w.show();
function main(sourceDoc, targetLayer, psArr) {
if (!sourceDoc.pageItems.length) {
sourceDoc.close(SaveOptions.DONOTSAVECHANGES);
psArr.push(null);
return;
}
sourceDoc.pageItems[0].selected = true;
if (!sourceDoc.pageItems[sourceDoc.pageItems.length - 1].selected) {
groupAll(sourceDoc);
}
psArr.push([sourceDoc.groupItems[0].top, sourceDoc.groupItems[0].left]);
sourceDoc.groupItems[0].duplicate().moveToEnd(targetLayer);
targetLayer.visible = false;
sourceDoc.close(SaveOptions.DONOTSAVECHANGES);
}
function groupAll(doc) {
var group = doc.layers.add().groupItems.add();
var layer = doc.layers[1];
for (a = layer.pageItems.length; a-- > 0; layer.pageItems[a].move(group, ElementPlacement.PLACEATBEGINNING)) {
}
}
function getPDFPageCount(f) {
var gotCount = false;
if (BridgeTalk.isInstalled("bridge") && BridgeTalk.isRunning("bridge")) {
return getPDFCount_Br(f);
}
f.open("r");
while (!gotCount) {
next_line = f.readln();
if (f.eof) {
alert("抱歉，未能获取总页数");
f.close();
return 0;
}
if (next_line.indexOf("/N ") > 0) {
p = next_line.match(//N (d+)/T/)[1];
gotCount = true;
} else {
if (next_line.indexOf("/Pages>>") > 0) {
p = next_line.match(//Count (d+)/K/)[1];
gotCount = true;
}
}
}
f.close();
return Number(p);
}
function getPDFCount_Br(file) {
var f = new File(file);
var bt = new BridgeTalk();
bt.target = "bridge";
bt.body = "function a(){app.document.setPresentationMode("browser","" + f.path + "");tn = new Thumbnail( File("" + f + "") ); return tn.core.itemContent.pageCount}a();";
bt.onResult = function(inBT) {
data = eval(inBT.body);
};
bt.onError = function(inBT) {
data = "";
};
bt.send();
bt.pump();
$.sleep(100);
timeOutAt = new Date().getTime() + 5000;
currentTime = new Date().getTime();
while (currentTime < timeOutAt && undefined == data) {
bt.pump();
$.sleep(100);
currentTime = new Date().getTime();
}
undefined == data && data = 0;
return data;
}
2.作者答疑
如有疑问，请留言。
提示： 作者知了-联系方式1
提示： 作者知了-联系方式2
