/* * CPPlatformString.j * AppKit * * Created by Francisco Tolmasky. * Copyright 2010, 280 North, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ var DOMFixedWidthSpanElement = nil, DOMFlexibleWidthSpanElement = nil, DOMMetricsDivElement = nil, DOMMetricsTextSpanElement = nil, DOMMetricsImgElement = nil, DOMIFrameElement = nil, DOMIFrameDocument = nil, DefaultFont = nil; @implementation CPPlatformString : CPBasePlatformString { } + (void)bootstrap { [self createDOMElements]; } + (void)createDOMElements { var style; DOMIFrameElement = document.createElement("iframe"); // necessary for Safari caching bug: DOMIFrameElement.name = "iframe_" + FLOOR(RAND() * 10000); DOMIFrameElement.className = "cpdontremove"; style = DOMIFrameElement.style; style.position = "absolute"; style.left = "-100px"; style.top = "-100px"; style.width = "1px"; style.height = "1px"; style.borderWidth = "0px"; style.overflow = "hidden"; style.zIndex = 100000000000; var bodyElement = [CPPlatform mainBodyElement]; bodyElement.appendChild(DOMIFrameElement); DOMIFrameDocument = (DOMIFrameElement.contentDocument || DOMIFrameElement.contentWindow.document); DOMIFrameDocument.write(''+ ''); DOMIFrameDocument.close(); // IE needs this wide
to prevent unwanted text wrapping: var DOMDivElement = DOMIFrameDocument.createElement("div"); DOMDivElement.style.position = "absolute"; DOMDivElement.style.width = "100000px"; DOMIFrameDocument.body.appendChild(DOMDivElement); DOMFlexibleWidthSpanElement = DOMIFrameDocument.createElement("span"); style = DOMFlexibleWidthSpanElement.style; style.position = "absolute"; style.visibility = "visible"; style.padding = "0px"; style.margin = "0px"; style.whiteSpace = "pre"; DOMFixedWidthSpanElement = DOMIFrameDocument.createElement("span"); style = DOMFixedWidthSpanElement.style; style.display = "block"; style.position = "absolute"; style.visibility = "visible"; style.padding = "0px"; style.margin = "0px"; style.width = "1px"; style.wordWrap = "break-word"; try { style.whiteSpace = "pre"; style.whiteSpace = "-o-pre-wrap"; style.whiteSpace = "-pre-wrap"; style.whiteSpace = "-moz-pre-wrap"; style.whiteSpace = "pre-wrap"; } catch(e) { //some versions of IE throw exceptions for unsupported properties. style.whiteSpace = "pre"; } DOMDivElement.appendChild(DOMFlexibleWidthSpanElement); DOMDivElement.appendChild(DOMFixedWidthSpanElement); } + (void)createDOMMetricsElements { if (!DOMIFrameElement) [self createDOMElements]; var style; DOMMetricsDivElement = DOMIFrameDocument.createElement("div"); DOMMetricsDivElement.style.position = "absolute"; DOMMetricsDivElement.style.width = "100000px"; DOMIFrameDocument.body.appendChild(DOMMetricsDivElement); DOMMetricsTextSpanElement = DOMIFrameDocument.createElement("span"); DOMMetricsTextSpanElement.innerHTML = "x"; style = DOMMetricsTextSpanElement.style; style.position = "absolute"; style.visibility = "visible"; style.padding = "0px"; style.margin = "0px"; style.whiteSpace = "pre"; var imgPath = [[CPBundle bundleForClass:[CPView class]] pathForResource:@"empty.png"]; DOMMetricsImgElement = DOMIFrameDocument.createElement("img"); DOMMetricsImgElement.setAttribute("src", imgPath); DOMMetricsImgElement.setAttribute("width", "1"); DOMMetricsImgElement.setAttribute("height", "1"); DOMMetricsImgElement.setAttribute("alt", ""); style = DOMMetricsImgElement.style; style.visibility = "visible"; style.padding = "0px"; style.margin = "0px"; style.border = "none"; style.verticalAlign = "baseline"; DOMMetricsDivElement.appendChild(DOMMetricsTextSpanElement); DOMMetricsDivElement.appendChild(DOMMetricsImgElement); } + (CGSize)sizeOfString:(CPString)aString withFont:(CPFont)aFont forWidth:(float)aWidth { if (!aFont) { if (!DefaultFont) DefaultFont = [CPFont systemFontOfSize:12.0]; aFont = DefaultFont; } if (!DOMIFrameElement) [self createDOMElements]; var span; if (!aWidth) span = DOMFlexibleWidthSpanElement; else { span = DOMFixedWidthSpanElement; span.style.width = ROUND(aWidth) + "px"; } span.style.font = [aFont cssString]; if (CPFeatureIsCompatible(CPJavaScriptInnerTextFeature)) span.innerText = aString; else if (CPFeatureIsCompatible(CPJavaScriptTextContentFeature)) span.textContent = aString; return _CGSizeMake(span.clientWidth, span.clientHeight); } + (CPDictionary)metricsOfFont:(CPFont)aFont { if (!aFont) { if (!DefaultFont) DefaultFont = [CPFont systemFontOfSize:12.0]; aFont = DefaultFont; } if (!DOMMetricsDivElement) [self createDOMMetricsElements]; DOMMetricsDivElement.style.font = [aFont cssString]; var baseline = DOMMetricsImgElement.offsetTop - DOMMetricsTextSpanElement.offsetTop + DOMMetricsImgElement.offsetHeight, descender = baseline - DOMMetricsTextSpanElement.offsetHeight, lineHeight = DOMMetricsTextSpanElement.offsetHeight; return [CPDictionary dictionaryWithObjectsAndKeys:baseline, @"ascender", descender, @"descender", lineHeight, @"lineHeight"]; } @end