Merge wxWebView JavaScript improvements branch

This is a squashed commit of the SOC2017_WEBVIEW_JS branch from https://github.com/joseeloren/wxWidgets.git Closes https://github.com/wxWidgets/wxWidgets/pull/538
2017-09-02 23:24:06 +01:00
parent 9f4f075034
commit af8f7f33c3
14 changed files with 757 additions and 49 deletions
--- a/include/wx/private/jsscriptwrapper.h
+++ b/include/wx/private/jsscriptwrapper.h
@@ -0,0 +1,146 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/private/jsscriptwrapper.h
+// Purpose:     JS Script Wrapper for wxWebView
+// Author:      Jose Lorenzo
+// Created:     2017-08-12
+// Copyright:   (c) 2017 Jose Lorenzo <josee.loren@gmail.com>
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_PRIVATE_JSSCRIPTWRAPPER_H_
+#define _WX_PRIVATE_JSSCRIPTWRAPPER_H_
+
+#include "wx/regex.h"
+
+// ----------------------------------------------------------------------------
+// JS Script Wrapper for wxWebView
+// ----------------------------------------------------------------------------
+
+class wxJSScriptWrapper
+{
+public:
+
+    explicit wxJSScriptWrapper(const wxString& js, int* runScriptCount) : m_jsscript(js)
+    {
+        // __wx$counter is used to have a different variable on every
+        // RunScript call, to not lose variable values between calls
+        m_wx$counter = wxString::Format("__wx$%i", (*runScriptCount)++);
+    }
+
+    // This method is used to add a double quote level into a JavasSript code
+    // in order to get it working when eval is called programmatically.
+    const wxString GetWrappedCode()
+    {
+        // Adds one escape level if there is a single quote, double quotes or
+        // esacape characters
+        wxRegEx escapeDoubleQuotes("(\\\\*)(['\"\n\r\v\t\b\f])");
+        escapeDoubleQuotes.Replace(&m_jsscript,"\\1\\1\\\\\\2");
+
+        return wxString::Format("try { var %s = eval(\"%s\"); true; } \
+            catch (e) { e.name + \": \" + e.message; }", m_wx$counter, m_jsscript);;
+    }
+
+    const wxString GetOutputCode()
+    {
+#if wxUSE_WEBVIEW && wxUSE_WEBVIEW_WEBKIT && defined(__WXOSX__)
+        return wxString::Format("if (typeof %s == 'object') \
+                                     JSON.stringify(%s); \
+                                 else if (typeof %s == 'undefined') \
+                                     'undefined'; \
+                                 else \
+                                     %s;",
+                                 m_wx$counter, m_wx$counter, m_wx$counter, m_wx$counter);
+#elif wxUSE_WEBVIEW && wxUSE_WEBVIEW_IE
+        return wxString::Format("try {(%s == null || typeof %s != 'object') ? String(%s) : JSON.stringify(%s);} \
+		    catch (e) { \
+				try \
+				{ \
+					function __wx$stringifyJSON(obj) \
+					{ \
+						var objElements = []; \
+						if (!(obj instanceof Object)) \
+							return typeof obj === \"string\" \
+								? \'\"\' + obj + \'\"\' : \'\' + obj; \
+						else if (obj instanceof Array) \
+						{ \
+							if (obj[0] === undefined) \
+								return \'[]\'; \
+							else \
+							{ \
+								var arr = []; \
+								for (var i = 0; i < obj.length; i++) \
+									arr.push(__wx$stringifyJSON(obj[i])); \
+								return \'[\' + arr + \']\'; \
+							} \
+						} \
+						else if (typeof obj === \"object\") \
+						{ \
+							if (obj instanceof Date) \
+							{ \
+								if (!Date.prototype.toISOString) \
+								{ \
+									(function() \
+									{ \
+										function pad(number) \
+										{ \
+											if (number < 10) \
+												return '0' + number; \
+											return number; \
+										} \
+										\
+										Date.prototype.toISOString = function() \
+										{ \
+											return this.getUTCFullYear() + \
+											'-' + pad(this.getUTCMonth() + 1) + \
+											'-' + pad(this.getUTCDate()) + \
+											'T' + pad(this.getUTCHours()) + \
+											':' + pad(this.getUTCMinutes()) + \
+											':' + pad(this.getUTCSeconds()) + \
+											'.' + (this.getUTCMilliseconds() / 1000).toFixed(3).slice(2, 5) + \
+											'Z\"'; \
+										}; \
+										\
+									}()); \
+								} \
+								return '\"' + obj.toISOString(); + '\"' \
+							} \
+							for (var key in obj) \
+							{ \
+								if (typeof obj[key] === \"function\") \
+									return \'{}\'; \
+								else \
+									objElements.push(\'\"\' \
+									+ key + \'\":\' + \
+									__wx$stringifyJSON(obj[key])); \
+							} \
+							return \'{\' + objElements + \'}\'; \
+						} \
+					} \
+					\
+					__wx$stringifyJSON(%s); \
+				} \
+				catch (e) { e.name + \": \" + e.message; }}",
+                m_wx$counter, m_wx$counter, m_wx$counter, m_wx$counter, m_wx$counter);
+#else
+        return m_wx$counter;
+#endif
+    }
+
+    const wxString GetCleanUpCode()
+    {
+        return wxString::Format("%s = undefined;", m_wx$counter);
+    }
+
+    const wxString GetOutputJSVariable()
+    {
+        return m_wx$counter;
+    }
+
+private:
+    wxString m_jsscript;
+    wxString m_wx$counter;
+
+    wxDECLARE_NO_COPY_CLASS(wxJSScriptWrapper);
+};
+
+#endif // _WX_PRIVATE_JSSCRIPTWRAPPER_H_