static float findScaleValue(const String& keyString, const String& valueString, Document* document)
{
// 1) Non-negative number values are translated to <number> values.
// 2) Negative number values are translated to auto.
// 3) yes is translated to 1.0.
// 4) device-width and device-height are translated to 10.0.
// 5) no and unknown values are translated to 0.0
if (equalIgnoringCase(valueString, "yes"))
return 1;
if (equalIgnoringCase(valueString, "no"))
return 0;
if (equalIgnoringCase(valueString, "desktop-width"))
return 10;
if (equalIgnoringCase(valueString, "device-width"))
return 10;
if (equalIgnoringCase(valueString, "device-height"))
return 10;
float value = numericPrefix(keyString, valueString, document);
if (value < 0)
return ViewportArguments::ValueAuto;
if (value > 10.0)
reportViewportWarning(document, MaximumScaleTooLargeError, String(), String());
return value;
}
static float findUserScalableValue(const String& keyString, const String& valueString, Document* document)
{
// yes and no are used as keywords.
// Numbers >= 1, numbers <= -1, device-width and device-height are mapped to yes.
// Numbers in the range <-1, 1>, and unknown values, are mapped to no.
if (equalIgnoringCase(valueString, "yes"))
return 1;
if (equalIgnoringCase(valueString, "no"))
return 0;
if (equalIgnoringCase(valueString, "desktop-width"))
return 1;
if (equalIgnoringCase(valueString, "device-width"))
return 1;
if (equalIgnoringCase(valueString, "device-height"))
return 1;
bool ok;
float value = numericPrefix(keyString, valueString, document, &ok);
if (!ok)
return 0;
if (fabs(value) < 1)
return 0;
return 1;
}
static float findSizeValue(const String& keyString, const String& valueString, Document* document)
{
// 1) Non-negative number values are translated to px lengths.
// 2) Negative number values are translated to auto.
// 3) device-width and device-height are used as keywords.
// 4) Other keywords and unknown values translate to 0.0.
if (equalIgnoringCase(valueString, "device-width"))
return ViewportArguments::ValueDeviceWidth;
if (equalIgnoringCase(valueString, "device-height"))
return ViewportArguments::ValueDeviceHeight;
float value = numericPrefix(keyString, valueString, document);
if (value < 0)
return ViewportArguments::ValueAuto;
return value;
}
static float findTargetDensityDPIValue(const String& keyString, const String& valueString, Document* document)
{
if (equalIgnoringCase(valueString, "device-dpi"))
return ViewportArguments::ValueDeviceDPI;
if (equalIgnoringCase(valueString, "low-dpi"))
return ViewportArguments::ValueLowDPI;
if (equalIgnoringCase(valueString, "medium-dpi"))
return ViewportArguments::ValueMediumDPI;
if (equalIgnoringCase(valueString, "high-dpi"))
return ViewportArguments::ValueHighDPI;
bool ok;
float value = numericPrefix(keyString, valueString, document, &ok);
if (!ok)
return ViewportArguments::ValueAuto;
if (value < 70 || value > 400) {
reportViewportWarning(document, TargetDensityDpiTooSmallOrLargeError, String(), String());
return ViewportArguments::ValueAuto;
}
return value;
}
