internal static Vector2 MeasureVisualElementTextSize(VisualElement ve, string textToMeasure, float width, MeasureMode widthMode, float height, MeasureMode heightMode)
{
float measuredWidth = float.NaN;
float measuredHeight = float.NaN;
// TODO: This scaling parameter should depend on the real scaling of the text (dpi scaling * world scaling)
// because depending of its value, the glyphs may align on different pixels which can change the
// measure. The resulting measure should then be divided by this scaling to obtain the local measure.
float scaling = 1;
Font usedFont = ve.style.font;
if (textToMeasure == null || usedFont == null)
{
return(new Vector2(measuredWidth, measuredHeight));
}
if (widthMode == MeasureMode.Exactly)
{
measuredWidth = width;
}
else
{
var textParams = TextStylePainterParameters.GetDefault(ve, textToMeasure);
textParams.text = textToMeasure;
textParams.font = usedFont;
textParams.wordWrapWidth = 0.0f;
textParams.wordWrap = false;
textParams.richText = true;
measuredWidth = TextNative.ComputeTextWidth(textParams.GetTextNativeSettings(scaling));
if (widthMode == MeasureMode.AtMost)
{
measuredWidth = Mathf.Min(measuredWidth, width);
}
}
if (heightMode == MeasureMode.Exactly)
{
measuredHeight = height;
}
else
{
var textParams = TextStylePainterParameters.GetDefault(ve, textToMeasure);
textParams.text = textToMeasure;
textParams.font = usedFont;
textParams.wordWrapWidth = measuredWidth;
textParams.richText = true;
measuredHeight = TextNative.ComputeTextHeight(textParams.GetTextNativeSettings(scaling));
if (heightMode == MeasureMode.AtMost)
{
measuredHeight = Mathf.Min(measuredHeight, height);
}
}
return(new Vector2(measuredWidth, measuredHeight));
}
internal void DrawWithTextSelectionAndCursor(IStylePainterInternal painter, string newText)
{
var keyboardTextEditor = editorEventHandler as KeyboardTextEditorEventHandler;
if (keyboardTextEditor == null)
{
return;
}
keyboardTextEditor.PreDrawCursor(newText);
int cursorIndex = editorEngine.cursorIndex;
int selectIndex = editorEngine.selectIndex;
Rect localPosition = editorEngine.localPosition;
Vector2 scrollOffset = editorEngine.scrollOffset;
IStyle style = this.style;
float textScaling = TextNative.ComputeTextScaling(worldTransform);
var textParams = TextStylePainterParameters.GetDefault(this, text);
textParams.text = " ";
textParams.wordWrapWidth = 0.0f;
textParams.wordWrap = false;
var textNativeSettings = textParams.GetTextNativeSettings(textScaling);
float lineHeight = TextNative.ComputeTextHeight(textNativeSettings);
float wordWrapWidth = editorEngine.multiline
? contentRect.width
: 0.0f;
Input.compositionCursorPos = editorEngine.graphicalCursorPos - scrollOffset +
new Vector2(localPosition.x, localPosition.y + lineHeight);
Color drawCursorColor = m_CursorColor.GetSpecifiedValueOrDefault(Color.grey);
int selectionEndIndex = string.IsNullOrEmpty(Input.compositionString)
? selectIndex
: cursorIndex + Input.compositionString.Length;
CursorPositionStylePainterParameters cursorParams;
// Draw highlighted section, if any
if (cursorIndex != selectionEndIndex)
{
var painterParams = RectStylePainterParameters.GetDefault(this);
painterParams.color = selectionColor;
painterParams.border.SetWidth(0.0f);
painterParams.border.SetRadius(0.0f);
int min = cursorIndex < selectionEndIndex ? cursorIndex : selectionEndIndex;
int max = cursorIndex > selectionEndIndex ? cursorIndex : selectionEndIndex;
cursorParams = CursorPositionStylePainterParameters.GetDefault(this, text);
cursorParams.text = editorEngine.text;
cursorParams.wordWrapWidth = wordWrapWidth;
cursorParams.cursorIndex = min;
textNativeSettings = cursorParams.GetTextNativeSettings(textScaling);
Vector2 minPos = TextNative.GetCursorPosition(textNativeSettings, cursorParams.rect, min);
Vector2 maxPos = TextNative.GetCursorPosition(textNativeSettings, cursorParams.rect, max);
minPos -= scrollOffset;
maxPos -= scrollOffset;
if (Mathf.Approximately(minPos.y, maxPos.y))
{
painterParams.rect = new Rect(minPos.x, minPos.y, maxPos.x - minPos.x, lineHeight);
painter.DrawRect(painterParams);
}
else
{
// Draw first line
painterParams.rect = new Rect(minPos.x, minPos.y, contentRect.xMax - minPos.x, lineHeight);
painter.DrawRect(painterParams);
var inbetweenHeight = (maxPos.y - minPos.y) - lineHeight;
if (inbetweenHeight > 0f)
{
// Draw all lines in-between
painterParams.rect = new Rect(contentRect.x, minPos.y + lineHeight, wordWrapWidth, inbetweenHeight);
painter.DrawRect(painterParams);
}
// Draw last line if not empty
if (maxPos.x != contentRect.x)
{
painterParams.rect = new Rect(contentRect.x, maxPos.y, maxPos.x, lineHeight);
painter.DrawRect(painterParams);
}
}
}
// Draw the text with the scroll offset
if (!string.IsNullOrEmpty(editorEngine.text) && contentRect.width > 0.0f && contentRect.height > 0.0f)
{
textParams = TextStylePainterParameters.GetDefault(this, text);
textParams.rect = new Rect(contentRect.x - scrollOffset.x, contentRect.y - scrollOffset.y, contentRect.width, contentRect.height);
textParams.text = editorEngine.text;
painter.DrawText(textParams);
}
// Draw the cursor
if (cursorIndex == selectionEndIndex && (Font)style.font != null)
{
cursorParams = CursorPositionStylePainterParameters.GetDefault(this, text);
cursorParams.text = editorEngine.text;
cursorParams.wordWrapWidth = wordWrapWidth;
cursorParams.cursorIndex = cursorIndex;
textNativeSettings = cursorParams.GetTextNativeSettings(textScaling);
Vector2 cursorPosition = TextNative.GetCursorPosition(textNativeSettings, cursorParams.rect, cursorParams.cursorIndex);
cursorPosition -= scrollOffset;
var painterParams = new RectStylePainterParameters
{
rect = new Rect(cursorPosition.x, cursorPosition.y, 1f, lineHeight),
color = drawCursorColor
};
painter.DrawRect(painterParams);
}
// Draw alternate cursor, if any
if (editorEngine.altCursorPosition != -1)
{
cursorParams = CursorPositionStylePainterParameters.GetDefault(this, text);
cursorParams.text = editorEngine.text.Substring(0, editorEngine.altCursorPosition);
cursorParams.wordWrapWidth = wordWrapWidth;
cursorParams.cursorIndex = editorEngine.altCursorPosition;
textNativeSettings = cursorParams.GetTextNativeSettings(textScaling);
Vector2 altCursorPosition = TextNative.GetCursorPosition(textNativeSettings, cursorParams.rect, cursorParams.cursorIndex);
altCursorPosition -= scrollOffset;
var painterParams = new RectStylePainterParameters
{
rect = new Rect(altCursorPosition.x, altCursorPosition.y, 1f, lineHeight),
color = drawCursorColor
};
painter.DrawRect(painterParams);
}
keyboardTextEditor.PostDrawCursor();
}
