mirror of
https://github.com/cappuccino/cappuccino.git
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210 lines
6.4 KiB
Plaintext
210 lines
6.4 KiB
Plaintext
/*
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* CPPlatformString.j
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* AppKit
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*
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* Created by Francisco Tolmasky.
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* Copyright 2010, 280 North, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "../CoreGraphics/CGGeometry.h"
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var DOMFixedWidthSpanElement = nil,
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DOMFlexibleWidthSpanElement = nil,
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DOMMetricsDivElement = nil,
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DOMMetricsTextSpanElement = nil,
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DOMMetricsImgElement = nil,
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DOMIFrameElement = nil,
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DOMIFrameDocument = nil,
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DefaultFont = nil;
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@implementation CPPlatformString : CPBasePlatformString
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{
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}
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+ (void)bootstrap
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{
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[self createDOMElements];
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}
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+ (void)createDOMElements
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{
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var style;
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DOMIFrameElement = document.createElement("iframe");
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// necessary for Safari caching bug:
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DOMIFrameElement.name = "iframe_" + FLOOR(RAND() * 10000);
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DOMIFrameElement.className = "cpdontremove";
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style = DOMIFrameElement.style;
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style.position = "absolute";
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style.left = "-100px";
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style.top = "-100px";
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style.width = "1px";
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style.height = "1px";
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style.borderWidth = "0px";
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style.overflow = "hidden";
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style.zIndex = 100000000000;
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var bodyElement = [CPPlatform mainBodyElement];
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bodyElement.appendChild(DOMIFrameElement);
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DOMIFrameDocument = (DOMIFrameElement.contentDocument || DOMIFrameElement.contentWindow.document);
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DOMIFrameDocument.write('<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">'+
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'<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"><head></head><body></body></html>');
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DOMIFrameDocument.close();
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// IE needs this wide <div> to prevent unwanted text wrapping:
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var DOMDivElement = DOMIFrameDocument.createElement("div");
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DOMDivElement.style.position = "absolute";
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DOMDivElement.style.width = "100000px";
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DOMIFrameDocument.body.appendChild(DOMDivElement);
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DOMFlexibleWidthSpanElement = DOMIFrameDocument.createElement("span");
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style = DOMFlexibleWidthSpanElement.style;
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style.position = "absolute";
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style.visibility = "visible";
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style.padding = "0px";
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style.margin = "0px";
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style.whiteSpace = "pre";
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DOMFixedWidthSpanElement = DOMIFrameDocument.createElement("span");
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style = DOMFixedWidthSpanElement.style;
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style.display = "block";
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style.position = "absolute";
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style.visibility = "visible";
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style.padding = "0px";
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style.margin = "0px";
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style.width = "1px";
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style.wordWrap = "break-word";
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try
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{
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style.whiteSpace = "pre";
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style.whiteSpace = "-o-pre-wrap";
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style.whiteSpace = "-pre-wrap";
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style.whiteSpace = "-moz-pre-wrap";
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style.whiteSpace = "pre-wrap";
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}
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catch(e)
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{
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//some versions of IE throw exceptions for unsupported properties.
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style.whiteSpace = "pre";
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}
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DOMDivElement.appendChild(DOMFlexibleWidthSpanElement);
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DOMDivElement.appendChild(DOMFixedWidthSpanElement);
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}
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+ (void)createDOMMetricsElements
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{
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if (!DOMIFrameElement)
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[self createDOMElements];
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var style;
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DOMMetricsDivElement = DOMIFrameDocument.createElement("div");
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DOMMetricsDivElement.style.position = "absolute";
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DOMMetricsDivElement.style.width = "100000px";
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DOMIFrameDocument.body.appendChild(DOMMetricsDivElement);
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DOMMetricsTextSpanElement = DOMIFrameDocument.createElement("span");
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DOMMetricsTextSpanElement.innerHTML = "x";
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style = DOMMetricsTextSpanElement.style;
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style.position = "absolute";
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style.visibility = "visible";
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style.padding = "0px";
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style.margin = "0px";
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style.whiteSpace = "pre";
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var imgPath = [[CPBundle bundleForClass:[CPView class]] pathForResource:@"empty.png"];
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DOMMetricsImgElement = DOMIFrameDocument.createElement("img");
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DOMMetricsImgElement.setAttribute("src", imgPath);
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DOMMetricsImgElement.setAttribute("width", "1");
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DOMMetricsImgElement.setAttribute("height", "1");
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DOMMetricsImgElement.setAttribute("alt", "");
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style = DOMMetricsImgElement.style;
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style.visibility = "visible";
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style.padding = "0px";
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style.margin = "0px";
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style.border = "none";
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style.verticalAlign = "baseline";
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DOMMetricsDivElement.appendChild(DOMMetricsTextSpanElement);
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DOMMetricsDivElement.appendChild(DOMMetricsImgElement);
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}
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+ (CGSize)sizeOfString:(CPString)aString withFont:(CPFont)aFont forWidth:(float)aWidth
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{
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if (!aFont)
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{
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if (!DefaultFont)
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DefaultFont = [CPFont systemFontOfSize:12.0];
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aFont = DefaultFont;
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}
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if (!DOMIFrameElement)
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[self createDOMElements];
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var span;
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if (!aWidth)
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span = DOMFlexibleWidthSpanElement;
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else
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{
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span = DOMFixedWidthSpanElement;
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span.style.width = ROUND(aWidth) + "px";
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}
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span.style.font = [aFont cssString];
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if (CPFeatureIsCompatible(CPJavascriptInnerTextFeature))
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span.innerText = aString;
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else if (CPFeatureIsCompatible(CPJavascriptTextContentFeature))
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span.textContent = aString;
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return _CGSizeMake(span.clientWidth, span.clientHeight);
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}
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+ (CPDictionary)metricsOfFont:(CPFont)aFont
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{
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if (!aFont)
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{
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if (!DefaultFont)
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DefaultFont = [CPFont systemFontOfSize:12.0];
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aFont = DefaultFont;
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}
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if (!DOMMetricsDivElement)
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[self createDOMMetricsElements];
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DOMMetricsDivElement.style.font = [aFont cssString];
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var baseline = DOMMetricsImgElement.offsetTop - DOMMetricsTextSpanElement.offsetTop + DOMMetricsImgElement.offsetHeight,
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descender = baseline - DOMMetricsTextSpanElement.offsetHeight,
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lineHeight = DOMMetricsTextSpanElement.offsetHeight;
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return [CPDictionary dictionaryWithObjectsAndKeys:baseline, @"ascender", descender, @"descender", lineHeight, @"lineHeight"];
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}
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@end
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