public void Initialize(Run* run, SCRIPT_ANALYSIS* scriptAnalysis, int charIndexInParagraph, int charCount)
{
this.run = *run;
if (this.run.RunKind == RunKind.Text)
this.run.CharCount = charCount;
CharIndexInParagraph = charIndexInParagraph;
ScriptAnalysis = *scriptAnalysis;
}
private static void SplitScriptRuns(ScriptParagraph* scriptParagraph, Run* runs, int runCount, SCRIPT_ITEM* scriptItems, int scriptItemCount)
{
// Reserve space for the largest possible number of script runs.
int maxScriptRuns = runCount + scriptItemCount;
scriptParagraph->EnsureScriptRunCapacity(maxScriptRuns);
// Merge Runs and SCRIPT_ITEMs to create ScriptRuns.
Run* run = runs;
int runStartCharIndex = 0;
Run* endRun = runs + runCount;
SCRIPT_ITEM* item = scriptItems;
SCRIPT_ITEM* endItem = scriptItems + scriptItemCount;
ScriptRun* startScriptRun = scriptParagraph->ScriptRuns;
ScriptRun* scriptRun = startScriptRun;
int currentCharIndex = 0;
for (; ; scriptRun++)
{
int runEndCharIndex = runStartCharIndex + run->CharCount;
int itemEndCharIndex = (item + 1)->iCharPos;
if (itemEndCharIndex < runEndCharIndex)
{
scriptRun->Initialize(run, &item->a, currentCharIndex, itemEndCharIndex - currentCharIndex);
currentCharIndex = itemEndCharIndex;
item++;
}
else if (runEndCharIndex < itemEndCharIndex)
{
scriptRun->Initialize(run, &item->a, currentCharIndex, runEndCharIndex - currentCharIndex);
runStartCharIndex = currentCharIndex = runEndCharIndex;
run++;
}
else
{
scriptRun->Initialize(run, &item->a, currentCharIndex, runEndCharIndex - currentCharIndex);
runStartCharIndex = currentCharIndex = runEndCharIndex;
run++;
item++;
// All sequences of Runs and Items should always end on the same char so we only
// need to check for termination here.
if (run == endRun)
{
Debug.Assert(item == endItem, "Inconsistent Run and SCRIPT_ITEM sequences.");
break;
}
}
}
scriptParagraph->ScriptRunCount = (int)(scriptRun - startScriptRun) + 1;
}
public void InitializeTruncatedCopy(ScriptRun* scriptRun, int truncatedLeadingCharsCount, int truncatedTrailingCharsCount)
{
this.run = scriptRun->run;
if (this.run.RunKind == RunKind.Text)
this.run.CharCount = scriptRun->CharCount - truncatedLeadingCharsCount - truncatedTrailingCharsCount;
ScriptAnalysis = scriptRun->ScriptAnalysis;
CharIndexInParagraph = scriptRun->CharIndexInParagraph + truncatedLeadingCharsCount;
}
