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Add reverseColor to raw_ostream.
To be used in printing unprintable source in clang diagnostics. Patch by Seth Cantrell! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@154800 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -136,6 +136,10 @@ namespace sys {
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/// Same as OutputColor, but only enables the bold attribute.
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static const char *OutputBold(bool bg);
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/// This function returns the escape sequence to reverse forground and
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/// background colors.
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static const char *OutputReverse();
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/// Resets the terminals colors, or returns an escape sequence to do so.
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static const char *ResetColor();
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/// @}
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@ -222,6 +222,9 @@ public:
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/// outputting colored text, or before program exit.
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virtual raw_ostream &resetColor() { return *this; }
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/// Reverses the forground and background colors.
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virtual raw_ostream &reverseColor() { return *this; }
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/// This function determines if this stream is connected to a "tty" or
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/// "console" window. That is, the output would be displayed to the user
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/// rather than being put on a pipe or stored in a file.
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@ -379,6 +382,8 @@ public:
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bool bg=false);
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virtual raw_ostream &resetColor();
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virtual raw_ostream &reverseColor();
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virtual bool is_displayed() const;
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/// has_error - Return the value of the flag in this raw_fd_ostream indicating
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@ -290,6 +290,10 @@ const char *Process::OutputBold(bool bg) {
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return "\033[1m";
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}
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const char *Process::OutputReverse() {
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return "\033[7m";
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}
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const char *Process::ResetColor() {
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return "\033[0m";
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}
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@ -215,6 +215,39 @@ const char *Process::OutputColor(char code, bool bold, bool bg) {
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return 0;
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}
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WORD GetConsoleTextAttribute(__in HANDLE hConsoleOutput)
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{
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CONSOLE_SCREEN_BUFFER_INFO info;
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GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE),&info);
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return info.wAttributes;
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}
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const char *Process::OutputReverse() {
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const WORD attributes
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= GetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE));
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const WORD foreground_mask = FOREGROUND_BLUE | FOREGROUND_GREEN |
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FOREGROUND_RED | FOREGROUND_INTENSITY;
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const WORD background_mask = BACKGROUND_BLUE | BACKGROUND_GREEN |
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BACKGROUND_RED | BACKGROUND_INTENSITY;
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const WORD color_mask = foreground_mask | background_mask;
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WORD new_attributes =
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((attributes & FOREGROUND_BLUE )?BACKGROUND_BLUE :0) |
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((attributes & FOREGROUND_GREEN )?BACKGROUND_GREEN :0) |
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((attributes & FOREGROUND_RED )?BACKGROUND_RED :0) |
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((attributes & FOREGROUND_INTENSITY)?BACKGROUND_INTENSITY:0) |
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((attributes & BACKGROUND_BLUE )?FOREGROUND_BLUE :0) |
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((attributes & BACKGROUND_GREEN )?FOREGROUND_GREEN :0) |
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((attributes & BACKGROUND_RED )?FOREGROUND_RED :0) |
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((attributes & BACKGROUND_INTENSITY)?FOREGROUND_INTENSITY:0) |
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0;
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new_attributes = (attributes & ~color_mask) | (new_attributes & color_mask);
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SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE),new_attributes);
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return 0;
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}
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const char *Process::ResetColor() {
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SetConsoleTextAttribute(GetStdHandle(STD_OUTPUT_HANDLE), defaultColors());
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return 0;
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@ -633,6 +633,19 @@ raw_ostream &raw_fd_ostream::resetColor() {
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return *this;
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}
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raw_ostream &raw_fd_ostream::reverseColor() {
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if (sys::Process::ColorNeedsFlush())
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flush();
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const char *colorcode = sys::Process::OutputReverse();
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if (colorcode) {
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size_t len = strlen(colorcode);
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write(colorcode, len);
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// don't account colors towards output characters
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pos -= len;
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}
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return *this;
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}
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bool raw_fd_ostream::is_displayed() const {
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return sys::Process::FileDescriptorIsDisplayed(FD);
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}
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